Merged commit includes the following changes: (#8755)

319052168  by rathodv:

    Change assertAllEqual to assertAllClose for Position Sensitive Crop and Resize to avoid flaky tests.

--
319044492  by rathodv:

    Internal change.

--
319039033  by ronnyvotel:

    Preprocessor ops for DensePose.

--
319035440  by sbeery:

    External beam code with DataFlow Support

--
318899436  by ronnyvotel:

    DensePose library for common operations like scaling, coordinate transformations, and flipping.

--
318833308  by Vivek Rathod:

      Internal Change

--

PiperOrigin-RevId: 319052168

research/object_detection/core/densepose_ops.py

+# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+"""DensePose operations.
+
+DensePose part ids are represented as tensors of shape
+[num_instances, num_points] and coordinates are represented as tensors of shape
+[num_instances, num_points, 4] where each point holds (y, x, v, u). The location
+of the DensePose sampled point is (y, x) in normalized coordinates. The surface
+coordinate (in the part coordinate frame) is (v, u). Note that dim 1 of both
+tensors may contain padding, since the number of sampled points per instance
+is not fixed. The value `num_points` represents the maximum number of sampled
+points for an instance in the example.
+"""
+import os
+
+import scipy.io
+import tensorflow.compat.v1 as tf
+
+from object_detection.utils import shape_utils
+
+PART_NAMES = [
+    b'torso_back', b'torso_front', b'right_hand', b'left_hand', b'left_foot',
+    b'right_foot', b'right_upper_leg_back', b'left_upper_leg_back',
+    b'right_upper_leg_front', b'left_upper_leg_front', b'right_lower_leg_back',
+    b'left_lower_leg_back', b'right_lower_leg_front', b'left_lower_leg_front',
+    b'left_upper_arm_back', b'right_upper_arm_back', b'left_upper_arm_front',
+    b'right_upper_arm_front', b'left_lower_arm_back', b'right_lower_arm_back',
+    b'left_lower_arm_front', b'right_lower_arm_front', b'right_face',
+    b'left_face',
+]
+
+_SRC_PATH = ('google3/third_party/tensorflow_models/object_detection/'
+             'dataset_tools/densepose')
+
+
+def scale(dp_surface_coords, y_scale, x_scale, scope=None):
+  """Scales DensePose coordinates in y and x dimensions.
+
+  Args:
+    dp_surface_coords: a tensor of shape [num_instances, num_points, 4], with
+      coordinates in (y, x, v, u) format.
+    y_scale: (float) scalar tensor
+    x_scale: (float) scalar tensor
+    scope: name scope.
+
+  Returns:
+    new_dp_surface_coords: a tensor of shape [num_instances, num_points, 4]
+  """
+  with tf.name_scope(scope, 'DensePoseScale'):
+    y_scale = tf.cast(y_scale, tf.float32)
+    x_scale = tf.cast(x_scale, tf.float32)
+    new_keypoints = dp_surface_coords * [[[y_scale, x_scale, 1, 1]]]
+    return new_keypoints
+
+
+def clip_to_window(dp_surface_coords, window, scope=None):
+  """Clips DensePose points to a window.
+
+  This op clips any input DensePose points to a window.
+
+  Args:
+    dp_surface_coords: a tensor of shape [num_instances, num_points, 4] with
+      DensePose surface coordinates in (y, x, v, u) format.
+    window: a tensor of shape [4] representing the [y_min, x_min, y_max, x_max]
+      window to which the op should clip the keypoints.
+    scope: name scope.
+
+  Returns:
+    new_dp_surface_coords: a tensor of shape [num_instances, num_points, 4].
+  """
+  with tf.name_scope(scope, 'DensePoseClipToWindow'):
+    y, x, v, u = tf.split(value=dp_surface_coords, num_or_size_splits=4, axis=2)
+    win_y_min, win_x_min, win_y_max, win_x_max = tf.unstack(window)
+    y = tf.maximum(tf.minimum(y, win_y_max), win_y_min)
+    x = tf.maximum(tf.minimum(x, win_x_max), win_x_min)
+    new_dp_surface_coords = tf.concat([y, x, v, u], 2)
+    return new_dp_surface_coords
+
+
+def prune_outside_window(dp_num_points, dp_part_ids, dp_surface_coords, window,
+                         scope=None):
+  """Prunes DensePose points that fall outside a given window.
+
+  This function replaces points that fall outside the given window with zeros.
+  See also clip_to_window which clips any DensePose points that fall outside the
+  given window.
+
+  Note that this operation uses dynamic shapes, and therefore is not currently
+  suitable for TPU.
+
+  Args:
+    dp_num_points: a tensor of shape [num_instances] that indicates how many
+      (non-padded) DensePose points there are per instance.
+    dp_part_ids: a tensor of shape [num_instances, num_points] with DensePose
+      part ids. These part_ids are 0-indexed, where the first non-background
+      part has index 0.
+    dp_surface_coords: a tensor of shape [num_instances, num_points, 4] with
+      DensePose surface coordinates in (y, x, v, u) format.
+    window: a tensor of shape [4] representing the [y_min, x_min, y_max, x_max]
+      window outside of which the op should prune the points.
+    scope: name scope.
+
+  Returns:
+    new_dp_num_points: a tensor of shape [num_instances] that indicates how many
+      (non-padded) DensePose points there are per instance after pruning.
+    new_dp_part_ids: a tensor of shape [num_instances, num_points] with
+      DensePose part ids. These part_ids are 0-indexed, where the first
+      non-background part has index 0.
+    new_dp_surface_coords: a tensor of shape [num_instances, num_points, 4] with
+      DensePose surface coordinates after pruning.
+  """
+  with tf.name_scope(scope, 'DensePosePruneOutsideWindow'):
+    y, x, _, _ = tf.unstack(dp_surface_coords, axis=-1)
+    win_y_min, win_x_min, win_y_max, win_x_max = tf.unstack(window)
+
+    num_instances, num_points = shape_utils.combined_static_and_dynamic_shape(
+        dp_part_ids)
+    dp_num_points_tiled = tf.tile(dp_num_points[:, tf.newaxis],
+                                  multiples=[1, num_points])
+    range_tiled = tf.tile(tf.range(num_points)[tf.newaxis, :],
+                          multiples=[num_instances, 1])
+    valid_initial = range_tiled < dp_num_points_tiled
+    valid_in_window = tf.logical_and(
+        tf.logical_and(y >= win_y_min, y <= win_y_max),
+        tf.logical_and(x >= win_x_min, x <= win_x_max))
+    valid_indices = tf.logical_and(valid_initial, valid_in_window)
+
+    new_dp_num_points = tf.math.reduce_sum(
+        tf.cast(valid_indices, tf.int32), axis=1)
+    max_num_points = tf.math.reduce_max(new_dp_num_points)
+
+    def gather_and_reshuffle(elems):
+      dp_part_ids, dp_surface_coords, valid_indices = elems
+      locs = tf.where(valid_indices)[:, 0]
+      valid_part_ids = tf.gather(dp_part_ids, locs, axis=0)
+      valid_part_ids_padded = shape_utils.pad_or_clip_nd(
+          valid_part_ids, output_shape=[max_num_points])
+      valid_surface_coords = tf.gather(dp_surface_coords, locs, axis=0)
+      valid_surface_coords_padded = shape_utils.pad_or_clip_nd(
+          valid_surface_coords, output_shape=[max_num_points, 4])
+      return [valid_part_ids_padded, valid_surface_coords_padded]
+
+    new_dp_part_ids, new_dp_surface_coords = (
+        shape_utils.static_or_dynamic_map_fn(
+            gather_and_reshuffle,
+            elems=[dp_part_ids, dp_surface_coords, valid_indices],
+            dtype=[tf.int32, tf.float32],
+            back_prop=False))
+    return new_dp_num_points, new_dp_part_ids, new_dp_surface_coords
+
+
+def change_coordinate_frame(dp_surface_coords, window, scope=None):
+  """Changes coordinate frame of the points to be relative to window's frame.
+
+  Given a window of the form [y_min, x_min, y_max, x_max] in normalized
+  coordinates, changes DensePose coordinates to be relative to this window.
+
+  An example use case is data augmentation: where we are given groundtruth
+  points and would like to randomly crop the image to some window. In this
+  case we need to change the coordinate frame of each sampled point to be
+  relative to this new window.
+
+  Args:
+    dp_surface_coords: a tensor of shape [num_instances, num_points, 4] with
+      DensePose surface coordinates in (y, x, v, u) format.
+    window: a tensor of shape [4] representing the [y_min, x_min, y_max, x_max]
+      window we should change the coordinate frame to.
+    scope: name scope.
+
+  Returns:
+    new_dp_surface_coords: a tensor of shape [num_instances, num_points, 4].
+  """
+  with tf.name_scope(scope, 'DensePoseChangeCoordinateFrame'):
+    win_height = window[2] - window[0]
+    win_width = window[3] - window[1]
+    new_dp_surface_coords = scale(
+        dp_surface_coords - [window[0], window[1], 0, 0],
+        1.0 / win_height, 1.0 / win_width)
+    return new_dp_surface_coords
+
+
+def to_normalized_coordinates(dp_surface_coords, height, width,
+                              check_range=True, scope=None):
+  """Converts absolute DensePose coordinates to normalized in range [0, 1].
+
+  This function raises an assertion failed error at graph execution time when
+  the maximum coordinate is smaller than 1.01 (which means that coordinates are
+  already normalized). The value 1.01 is to deal with small rounding errors.
+
+  Args:
+    dp_surface_coords: a tensor of shape [num_instances, num_points, 4] with
+      DensePose absolute surface coordinates in (y, x, v, u) format.
+    height: Height of image.
+    width: Width of image.
+    check_range: If True, checks if the coordinates are already normalized.
+    scope: name scope.
+
+  Returns:
+    A tensor of shape [num_instances, num_points, 4] with normalized
+    coordinates.
+  """
+  with tf.name_scope(scope, 'DensePoseToNormalizedCoordinates'):
+    height = tf.cast(height, tf.float32)
+    width = tf.cast(width, tf.float32)
+
+    if check_range:
+      max_val = tf.reduce_max(dp_surface_coords[:, :, :2])
+      max_assert = tf.Assert(tf.greater(max_val, 1.01),
+                             ['max value is lower than 1.01: ', max_val])
+      with tf.control_dependencies([max_assert]):
+        width = tf.identity(width)
+
+    return scale(dp_surface_coords, 1.0 / height, 1.0 / width)
+
+
+def to_absolute_coordinates(dp_surface_coords, height, width,
+                            check_range=True, scope=None):
+  """Converts normalized DensePose coordinates to absolute pixel coordinates.
+
+  This function raises an assertion failed error when the maximum
+  coordinate value is larger than 1.01 (in which case coordinates are already
+  absolute).
+
+  Args:
+    dp_surface_coords: a tensor of shape [num_instances, num_points, 4] with
+      DensePose normalized surface coordinates in (y, x, v, u) format.
+    height: Height of image.
+    width: Width of image.
+    check_range: If True, checks if the coordinates are normalized or not.
+    scope: name scope.
+
+  Returns:
+    A tensor of shape [num_instances, num_points, 4] with absolute coordinates.
+  """
+  with tf.name_scope(scope, 'DensePoseToAbsoluteCoordinates'):
+    height = tf.cast(height, tf.float32)
+    width = tf.cast(width, tf.float32)
+
+    if check_range:
+      max_val = tf.reduce_max(dp_surface_coords[:, :, :2])
+      max_assert = tf.Assert(tf.greater_equal(1.01, max_val),
+                             ['maximum coordinate value is larger than 1.01: ',
+                              max_val])
+      with tf.control_dependencies([max_assert]):
+        width = tf.identity(width)
+
+    return scale(dp_surface_coords, height, width)
+
+
+class DensePoseHorizontalFlip(object):
+  """Class responsible for horizontal flipping of parts and surface coords."""
+
+  def __init__(self):
+    """Constructor."""
+
+    uv_symmetry_transforms_path = os.path.join(
+        tf.resource_loader.get_data_files_path(), '..', 'dataset_tools',
+        'densepose', 'UV_symmetry_transforms.mat')
+    data = scipy.io.loadmat(uv_symmetry_transforms_path)
+
+    # Create lookup maps which indicate how a VU coordinate changes after a
+    # horizontal flip.
+    uv_symmetry_map = {}
+    for key in ('U_transforms', 'V_transforms'):
+      uv_symmetry_map_per_part = []
+      for i in range(data[key].shape[1]):
+        # The following tensor has shape [256, 256].
+        map_per_part = tf.constant(data[key][0, i], dtype=tf.float32)
+        uv_symmetry_map_per_part.append(map_per_part)
+      uv_symmetry_map[key] = tf.reshape(
+          tf.stack(uv_symmetry_map_per_part, axis=0), [-1])
+    # The following dictionary contains flattened lookup maps for the U and V
+    # coordinates separately. The shape of each is [24 * 256 * 256].
+    self.uv_symmetries = uv_symmetry_map
+
+    # Create a list of that maps part index to flipped part index (0-indexed).
+    part_symmetries = []
+    for i, part_name in enumerate(PART_NAMES):
+      if b'left' in part_name:
+        part_symmetries.append(PART_NAMES.index(
+            part_name.replace(b'left', b'right')))
+      elif b'right' in part_name:
+        part_symmetries.append(PART_NAMES.index(
+            part_name.replace(b'right', b'left')))
+      else:
+        part_symmetries.append(i)
+    self.part_symmetries = part_symmetries
+
+  def flip_parts_and_coords(self, part_ids, vu):
+    """Flips part ids and coordinates.
+
+    Args:
+      part_ids: a [num_instances, num_points] int32 tensor with pre-flipped part
+        ids. These part_ids are 0-indexed, where the first non-background part
+        has index 0.
+      vu: a [num_instances, num_points, 2] float32 tensor with pre-flipped vu
+        normalized coordinates.
+
+    Returns:
+      new_part_ids: a [num_instances, num_points] int32 tensor with post-flipped
+        part ids. These part_ids are 0-indexed, where the first non-background
+        part has index 0.
+      new_vu: a [num_instances, num_points, 2] float32 tensor with post-flipped
+        vu coordinates.
+    """
+    num_instances, num_points = shape_utils.combined_static_and_dynamic_shape(
+        part_ids)
+    part_ids_flattened = tf.reshape(part_ids, [-1])
+    new_part_ids_flattened = tf.gather(self.part_symmetries, part_ids_flattened)
+    new_part_ids = tf.reshape(new_part_ids_flattened,
+                              [num_instances, num_points])
+
+    # Convert VU floating point coordinates to values in [256, 256] grid.
+    vu = tf.math.minimum(tf.math.maximum(vu, 0.0), 1.0)
+    vu_locs = tf.cast(vu * 256., dtype=tf.int32)
+    vu_locs_flattened = tf.reshape(vu_locs, [-1, 2])
+    v_locs_flattened, u_locs_flattened = tf.unstack(vu_locs_flattened, axis=1)
+
+    # Convert vu_locs into lookup indices (in flattened part symmetries map).
+    symmetry_lookup_inds = (
+        part_ids_flattened * 65536 + 256 * v_locs_flattened + u_locs_flattened)
+
+    # New VU coordinates.
+    v_new = tf.gather(self.uv_symmetries['V_transforms'], symmetry_lookup_inds)
+    u_new = tf.gather(self.uv_symmetries['U_transforms'], symmetry_lookup_inds)
+    new_vu_flattened = tf.stack([v_new, u_new], axis=1)
+    new_vu = tf.reshape(new_vu_flattened, [num_instances, num_points, 2])
+
+    return new_part_ids, new_vu
+
+
+def flip_horizontal(dp_part_ids, dp_surface_coords, scope=None):
+  """Flips the DensePose points horizontally around the flip_point.
+
+  This operation flips dense pose annotations horizontally. Note that part ids
+  and surface coordinates may or may not change as a result of the flip.
+
+  Args:
+    dp_part_ids: a tensor of shape [num_instances, num_points] with DensePose
+      part ids. These part_ids are 0-indexed, where the first non-background
+      part has index 0.
+    dp_surface_coords: a tensor of shape [num_instances, num_points, 4] with
+      DensePose surface coordinates in (y, x, v, u) normalized format.
+    scope: name scope.
+
+  Returns:
+    new_dp_part_ids: a tensor of shape [num_instances, num_points] with
+      DensePose part ids after flipping.
+    new_dp_surface_coords: a tensor of shape [num_instances, num_points, 4] with
+      DensePose surface coordinates after flipping.
+  """
+  with tf.name_scope(scope, 'DensePoseFlipHorizontal'):
+    # First flip x coordinate.
+    y, x, vu = tf.split(dp_surface_coords, num_or_size_splits=[1, 1, 2], axis=2)
+    xflipped = 1.0 - x
+
+    # Flip part ids and surface coordinates.
+    horizontal_flip = DensePoseHorizontalFlip()
+    new_dp_part_ids, new_vu = horizontal_flip.flip_parts_and_coords(
+        dp_part_ids, vu)
+    new_dp_surface_coords = tf.concat([y, xflipped, new_vu], axis=2)
+    return new_dp_part_ids, new_dp_surface_coords
+

research/object_detection/core/densepose_ops_test.py

+# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+"""Tests for object_detection.core.densepose_ops."""
+import numpy as np
+import tensorflow.compat.v1 as tf
+
+from object_detection.core import densepose_ops
+from object_detection.utils import test_case
+
+
+class DensePoseOpsTest(test_case.TestCase):
+  """Tests for common DensePose operations."""
+
+  def test_scale(self):
+    def graph_fn():
+      dp_surface_coords = tf.constant([
+          [[0.0, 0.0, 0.1, 0.2], [100.0, 200.0, 0.3, 0.4]],
+          [[50.0, 120.0, 0.5, 0.6], [100.0, 140.0, 0.7, 0.8]]
+      ])
+      y_scale = tf.constant(1.0 / 100)
+      x_scale = tf.constant(1.0 / 200)
+
+      output = densepose_ops.scale(dp_surface_coords, y_scale, x_scale)
+      return output
+    output = self.execute(graph_fn, [])
+
+    expected_dp_surface_coords = np.array([
+        [[0., 0., 0.1, 0.2], [1.0, 1.0, 0.3, 0.4]],
+        [[0.5, 0.6, 0.5, 0.6], [1.0, 0.7, 0.7, 0.8]]
+    ])
+    self.assertAllClose(output, expected_dp_surface_coords)
+
+  def test_clip_to_window(self):
+    def graph_fn():
+      dp_surface_coords = tf.constant([
+          [[0.25, 0.5, 0.1, 0.2], [0.75, 0.75, 0.3, 0.4]],
+          [[0.5, 0.0, 0.5, 0.6], [1.0, 1.0, 0.7, 0.8]]
+      ])
+      window = tf.constant([0.25, 0.25, 0.75, 0.75])
+
+      output = densepose_ops.clip_to_window(dp_surface_coords, window)
+      return output
+    output = self.execute(graph_fn, [])
+
+    expected_dp_surface_coords = np.array([
+        [[0.25, 0.5, 0.1, 0.2], [0.75, 0.75, 0.3, 0.4]],
+        [[0.5, 0.25, 0.5, 0.6], [0.75, 0.75, 0.7, 0.8]]
+    ])
+    self.assertAllClose(output, expected_dp_surface_coords)
+
+  def test_prune_outside_window(self):
+    def graph_fn():
+      dp_num_points = tf.constant([2, 0, 1])
+      dp_part_ids = tf.constant([[1, 1], [0, 0], [16, 0]])
+      dp_surface_coords = tf.constant([
+          [[0.9, 0.5, 0.1, 0.2], [0.75, 0.75, 0.3, 0.4]],
+          [[0.0, 0.0, 0.0, 0.0], [0.0, 0.0, 0.0, 0.0]],
+          [[0.8, 0.5, 0.6, 0.6], [0.5, 0.5, 0.7, 0.7]]
+      ])
+      window = tf.constant([0.25, 0.25, 0.75, 0.75])
+
+      new_dp_num_points, new_dp_part_ids, new_dp_surface_coords = (
+          densepose_ops.prune_outside_window(dp_num_points, dp_part_ids,
+                                             dp_surface_coords, window))
+      return new_dp_num_points, new_dp_part_ids, new_dp_surface_coords
+    new_dp_num_points, new_dp_part_ids, new_dp_surface_coords = (
+        self.execute_cpu(graph_fn, []))
+
+    expected_dp_num_points = np.array([1, 0, 0])
+    expected_dp_part_ids = np.array([[1], [0], [0]])
+    expected_dp_surface_coords = np.array([
+        [[0.75, 0.75, 0.3, 0.4]],
+        [[0.0, 0.0, 0.0, 0.0]],
+        [[0.0, 0.0, 0.0, 0.0]]
+    ])
+    self.assertAllEqual(new_dp_num_points, expected_dp_num_points)
+    self.assertAllEqual(new_dp_part_ids, expected_dp_part_ids)
+    self.assertAllClose(new_dp_surface_coords, expected_dp_surface_coords)
+
+  def test_change_coordinate_frame(self):
+    def graph_fn():
+      dp_surface_coords = tf.constant([
+          [[0.25, 0.5, 0.1, 0.2], [0.75, 0.75, 0.3, 0.4]],
+          [[0.5, 0.0, 0.5, 0.6], [1.0, 1.0, 0.7, 0.8]]
+      ])
+      window = tf.constant([0.25, 0.25, 0.75, 0.75])
+
+      output = densepose_ops.change_coordinate_frame(dp_surface_coords, window)
+      return output
+    output = self.execute(graph_fn, [])
+
+    expected_dp_surface_coords = np.array([
+        [[0, 0.5, 0.1, 0.2], [1.0, 1.0, 0.3, 0.4]],
+        [[0.5, -0.5, 0.5, 0.6], [1.5, 1.5, 0.7, 0.8]]
+    ])
+    self.assertAllClose(output, expected_dp_surface_coords)
+
+  def test_to_normalized_coordinates(self):
+    def graph_fn():
+      dp_surface_coords = tf.constant([
+          [[10., 30., 0.1, 0.2], [30., 45., 0.3, 0.4]],
+          [[20., 0., 0.5, 0.6], [40., 60., 0.7, 0.8]]
+      ])
+      output = densepose_ops.to_normalized_coordinates(
+          dp_surface_coords, 40, 60)
+      return output
+    output = self.execute(graph_fn, [])
+
+    expected_dp_surface_coords = np.array([
+        [[0.25, 0.5, 0.1, 0.2], [0.75, 0.75, 0.3, 0.4]],
+        [[0.5, 0.0, 0.5, 0.6], [1.0, 1.0, 0.7, 0.8]]
+    ])
+    self.assertAllClose(output, expected_dp_surface_coords)
+
+  def test_to_absolute_coordinates(self):
+    def graph_fn():
+      dp_surface_coords = tf.constant([
+          [[0.25, 0.5, 0.1, 0.2], [0.75, 0.75, 0.3, 0.4]],
+          [[0.5, 0.0, 0.5, 0.6], [1.0, 1.0, 0.7, 0.8]]
+      ])
+      output = densepose_ops.to_absolute_coordinates(
+          dp_surface_coords, 40, 60)
+      return output
+    output = self.execute(graph_fn, [])
+
+    expected_dp_surface_coords = np.array([
+        [[10., 30., 0.1, 0.2], [30., 45., 0.3, 0.4]],
+        [[20., 0., 0.5, 0.6], [40., 60., 0.7, 0.8]]
+    ])
+    self.assertAllClose(output, expected_dp_surface_coords)
+
+  def test_horizontal_flip(self):
+    part_ids_np = np.array([[1, 4], [0, 8]], dtype=np.int32)
+    surf_coords_np = np.array([
+        [[0.1, 0.7, 0.2, 0.4], [0.3, 0.8, 0.2, 0.4]],
+        [[0.0, 0.5, 0.8, 0.7], [0.6, 1.0, 0.7, 0.9]],
+    ], dtype=np.float32)
+    def graph_fn():
+      part_ids = tf.constant(part_ids_np, dtype=tf.int32)
+      surf_coords = tf.constant(surf_coords_np, dtype=tf.float32)
+      flipped_part_ids, flipped_surf_coords = densepose_ops.flip_horizontal(
+          part_ids, surf_coords)
+      flipped_twice_part_ids, flipped_twice_surf_coords = (
+          densepose_ops.flip_horizontal(flipped_part_ids, flipped_surf_coords))
+      return (flipped_part_ids, flipped_surf_coords,
+              flipped_twice_part_ids, flipped_twice_surf_coords)
+    (flipped_part_ids, flipped_surf_coords, flipped_twice_part_ids,
+     flipped_twice_surf_coords) = self.execute(graph_fn, [])
+
+    expected_flipped_part_ids = [[1, 5],  # 1->1, 4->5
+                                 [0, 9]]  # 0->0, 8->9
+    expected_flipped_surf_coords_yx = np.array([
+        [[0.1, 1.0-0.7], [0.3, 1.0-0.8]],
+        [[0.0, 1.0-0.5], [0.6, 1.0-1.0]],
+    ], dtype=np.float32)
+    self.assertAllEqual(expected_flipped_part_ids, flipped_part_ids)
+    self.assertAllClose(expected_flipped_surf_coords_yx,
+                        flipped_surf_coords[:, :, 0:2])
+    self.assertAllEqual(part_ids_np, flipped_twice_part_ids)
+    self.assertAllClose(surf_coords_np, flipped_twice_surf_coords, rtol=1e-2,
+                        atol=1e-2)
+
+
+if __name__ == '__main__':
+  tf.test.main()

research/object_detection/core/preprocessor_test.py

@@ -119,6 +119,24 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
     ])
     return tf.constant(keypoints, dtype=tf.float32)
 
+  def createTestDensePose(self):
+    dp_num_points = tf.constant([1, 3], dtype=tf.int32)
+    dp_part_ids = tf.constant(
+        [[4, 0, 0],
+         [1, 0, 5]], dtype=tf.int32)
+    dp_surface_coords = tf.constant(
+        [
+            # Instance 0.
+            [[0.1, 0.2, 0.6, 0.7],
+             [0.0, 0.0, 0.0, 0.0],
+             [0.0, 0.0, 0.0, 0.0]],
+            # Instance 1.
+            [[0.8, 0.9, 0.2, 0.4],
+             [0.1, 0.3, 0.2, 0.8],
+             [0.6, 1.0, 0.3, 0.4]],
+        ], dtype=tf.float32)
+    return dp_num_points, dp_part_ids, dp_surface_coords
+
   def createKeypointFlipPermutation(self):
     return [0, 2, 1]
 
@@ -694,7 +712,11 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
                                 test_masks=True,
                                 test_keypoints=True)
 
-  def testRunRandomHorizontalFlipWithMaskAndKeypoints(self):
+  @parameterized.parameters(
+      {'include_dense_pose': False},
+      {'include_dense_pose': True}
+  )
+  def testRunRandomHorizontalFlipWithMaskAndKeypoints(self, include_dense_pose):
 
     def graph_fn():
       preprocess_options = [(preprocessor.random_horizontal_flip, {})]
@@ -704,6 +726,7 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
       boxes = self.createTestBoxes()
       masks = self.createTestMasks()
       keypoints, keypoint_visibilities = self.createTestKeypoints()
+      dp_num_point, dp_part_ids, dp_surface_coords = self.createTestDensePose()
       keypoint_flip_permutation = self.createKeypointFlipPermutation()
       tensor_dict = {
           fields.InputDataFields.image:
@@ -717,13 +740,21 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
           fields.InputDataFields.groundtruth_keypoint_visibilities:
               keypoint_visibilities
       }
+      if include_dense_pose:
+        tensor_dict.update({
+            fields.InputDataFields.groundtruth_dp_num_points: dp_num_point,
+            fields.InputDataFields.groundtruth_dp_part_ids: dp_part_ids,
+            fields.InputDataFields.groundtruth_dp_surface_coords:
+                dp_surface_coords
+        })
       preprocess_options = [(preprocessor.random_horizontal_flip, {
           'keypoint_flip_permutation': keypoint_flip_permutation
       })]
       preprocessor_arg_map = preprocessor.get_default_func_arg_map(
           include_instance_masks=True,
           include_keypoints=True,
-          include_keypoint_visibilities=True)
+          include_keypoint_visibilities=True,
+          include_dense_pose=include_dense_pose)
       tensor_dict = preprocessor.preprocess(
           tensor_dict, preprocess_options, func_arg_map=preprocessor_arg_map)
       boxes = tensor_dict[fields.InputDataFields.groundtruth_boxes]
@@ -731,14 +762,26 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
       keypoints = tensor_dict[fields.InputDataFields.groundtruth_keypoints]
       keypoint_visibilities = tensor_dict[
           fields.InputDataFields.groundtruth_keypoint_visibilities]
-      return [boxes, masks, keypoints, keypoint_visibilities]
-
-    boxes, masks, keypoints, keypoint_visibilities = self.execute_cpu(
-        graph_fn, [])
-    self.assertIsNotNone(boxes)
-    self.assertIsNotNone(masks)
-    self.assertIsNotNone(keypoints)
-    self.assertIsNotNone(keypoint_visibilities)
+      output_tensors = [boxes, masks, keypoints, keypoint_visibilities]
+      if include_dense_pose:
+        dp_num_points = tensor_dict[
+            fields.InputDataFields.groundtruth_dp_num_points]
+        dp_part_ids = tensor_dict[
+            fields.InputDataFields.groundtruth_dp_part_ids]
+        dp_surface_coords = tensor_dict[
+            fields.InputDataFields.groundtruth_dp_surface_coords]
+        output_tensors.extend([dp_num_points, dp_part_ids, dp_surface_coords])
+      return output_tensors
+
+    output_tensors = self.execute_cpu(graph_fn, [])
+    self.assertIsNotNone(output_tensors[0])  # Boxes.
+    self.assertIsNotNone(output_tensors[1])  # Masks.
+    self.assertIsNotNone(output_tensors[2])  # Keypoints
+    self.assertIsNotNone(output_tensors[3])  # Keypoint Visibilities.
+    if include_dense_pose:
+      self.assertIsNotNone(output_tensors[4])  # DensePose Num Points.
+      self.assertIsNotNone(output_tensors[5])  # DensePose Part IDs.
+      self.assertIsNotNone(output_tensors[6])  # DensePose Surface Coords
 
   def testRandomVerticalFlip(self):
 
@@ -1886,6 +1929,65 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
       self.assertAllClose(
           distorted_keypoints_.flatten(), expected_keypoints.flatten())
 
+  def testRunRandomCropImageWithDensePose(self):
+    def graph_fn():
+      image = self.createColorfulTestImage()
+      boxes = self.createTestBoxes()
+      labels = self.createTestLabels()
+      weights = self.createTestGroundtruthWeights()
+      dp_num_points, dp_part_ids, dp_surface_coords = self.createTestDensePose()
+
+      tensor_dict = {
+          fields.InputDataFields.image: image,
+          fields.InputDataFields.groundtruth_boxes: boxes,
+          fields.InputDataFields.groundtruth_classes: labels,
+          fields.InputDataFields.groundtruth_weights: weights,
+          fields.InputDataFields.groundtruth_dp_num_points: dp_num_points,
+          fields.InputDataFields.groundtruth_dp_part_ids: dp_part_ids,
+          fields.InputDataFields.groundtruth_dp_surface_coords:
+              dp_surface_coords
+      }
+
+      preprocessor_arg_map = preprocessor.get_default_func_arg_map(
+          include_dense_pose=True)
+
+      preprocessing_options = [(preprocessor.random_crop_image, {})]
+
+      with mock.patch.object(
+          tf.image,
+          'sample_distorted_bounding_box'
+      ) as mock_sample_distorted_bounding_box:
+        mock_sample_distorted_bounding_box.return_value = (
+            tf.constant([6, 40, 0], dtype=tf.int32),
+            tf.constant([134, 340, -1], dtype=tf.int32),
+            tf.constant([[[0.03, 0.1, 0.7, 0.95]]], dtype=tf.float32))
+        distorted_tensor_dict = preprocessor.preprocess(
+            tensor_dict,
+            preprocessing_options,
+            func_arg_map=preprocessor_arg_map)
+        distorted_image = distorted_tensor_dict[fields.InputDataFields.image]
+        distorted_dp_num_points = distorted_tensor_dict[
+            fields.InputDataFields.groundtruth_dp_num_points]
+        distorted_dp_part_ids = distorted_tensor_dict[
+            fields.InputDataFields.groundtruth_dp_part_ids]
+        distorted_dp_surface_coords = distorted_tensor_dict[
+            fields.InputDataFields.groundtruth_dp_surface_coords]
+        return [distorted_image, distorted_dp_num_points, distorted_dp_part_ids,
+                distorted_dp_surface_coords]
+    (distorted_image_, distorted_dp_num_points_, distorted_dp_part_ids_,
+     distorted_dp_surface_coords_) = self.execute_cpu(graph_fn, [])
+    expected_dp_num_points = np.array([1, 1])
+    expected_dp_part_ids = np.array([[4], [0]])
+    expected_dp_surface_coords = np.array([
+        [[0.10447761, 0.1176470, 0.6, 0.7]],
+        [[0.10447761, 0.2352941, 0.2, 0.8]],
+    ])
+    self.assertAllEqual(distorted_image_.shape, [1, 134, 340, 3])
+    self.assertAllEqual(distorted_dp_num_points_, expected_dp_num_points)
+    self.assertAllEqual(distorted_dp_part_ids_, expected_dp_part_ids)
+    self.assertAllClose(distorted_dp_surface_coords_,
+                        expected_dp_surface_coords)
+
   def testRunRetainBoxesAboveThreshold(self):
     def graph_fn():
       boxes = self.createTestBoxes()
@@ -2276,7 +2378,11 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
     self.assertTrue(np.all((boxes_[:, 3] - boxes_[:, 1]) >= (
         padded_boxes_[:, 3] - padded_boxes_[:, 1])))
 
-  def testRandomPadImageWithKeypointsAndMasks(self):
+  @parameterized.parameters(
+      {'include_dense_pose': False},
+      {'include_dense_pose': True}
+  )
+  def testRandomPadImageWithKeypointsAndMasks(self, include_dense_pose):
     def graph_fn():
       preprocessing_options = [(preprocessor.normalize_image, {
           'original_minval': 0,
@@ -2290,12 +2396,15 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
       labels = self.createTestLabels()
       masks = self.createTestMasks()
       keypoints, _ = self.createTestKeypoints()
+      _, _, dp_surface_coords = self.createTestDensePose()
       tensor_dict = {
           fields.InputDataFields.image: images,
           fields.InputDataFields.groundtruth_boxes: boxes,
           fields.InputDataFields.groundtruth_classes: labels,
           fields.InputDataFields.groundtruth_instance_masks: masks,
           fields.InputDataFields.groundtruth_keypoints: keypoints,
+          fields.InputDataFields.groundtruth_dp_surface_coords:
+              dp_surface_coords
       }
       tensor_dict = preprocessor.preprocess(tensor_dict, preprocessing_options)
       images = tensor_dict[fields.InputDataFields.image]
@@ -2304,7 +2413,8 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
       func_arg_map = preprocessor.get_default_func_arg_map(
           include_instance_masks=True,
           include_keypoints=True,
-          include_keypoint_visibilities=True)
+          include_keypoint_visibilities=True,
+          include_dense_pose=include_dense_pose)
       padded_tensor_dict = preprocessor.preprocess(tensor_dict,
                                                    preprocessing_options,
                                                    func_arg_map=func_arg_map)
@@ -2323,15 +2433,29 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
       padded_keypoints_shape = tf.shape(padded_keypoints)
       images_shape = tf.shape(images)
       padded_images_shape = tf.shape(padded_images)
-      return [boxes_shape, padded_boxes_shape, padded_masks_shape,
+      outputs = [boxes_shape, padded_boxes_shape, padded_masks_shape,
                  keypoints_shape, padded_keypoints_shape, images_shape,
                  padded_images_shape, boxes, padded_boxes, keypoints,
                  padded_keypoints]
+      if include_dense_pose:
+        padded_dp_surface_coords = padded_tensor_dict[
+            fields.InputDataFields.groundtruth_dp_surface_coords]
+        outputs.extend([dp_surface_coords, padded_dp_surface_coords])
+      return outputs
+
+    outputs = self.execute_cpu(graph_fn, [])
+    boxes_shape_ = outputs[0]
+    padded_boxes_shape_ = outputs[1]
+    padded_masks_shape_ = outputs[2]
+    keypoints_shape_ = outputs[3]
+    padded_keypoints_shape_ = outputs[4]
+    images_shape_ = outputs[5]
+    padded_images_shape_ = outputs[6]
+    boxes_ = outputs[7]
+    padded_boxes_ = outputs[8]
+    keypoints_ = outputs[9]
+    padded_keypoints_ = outputs[10]
 
-    (boxes_shape_, padded_boxes_shape_, padded_masks_shape_,
-     keypoints_shape_, padded_keypoints_shape_, images_shape_,
-     padded_images_shape_, boxes_, padded_boxes_,
-     keypoints_, padded_keypoints_) = self.execute_cpu(graph_fn, [])
     self.assertAllEqual(boxes_shape_, padded_boxes_shape_)
     self.assertAllEqual(keypoints_shape_, padded_keypoints_shape_)
     self.assertTrue((images_shape_[1] >= padded_images_shape_[1] * 0.5).all)
@@ -2347,6 +2471,11 @@ class PreprocessorTest(test_case.TestCase, parameterized.TestCase):
         padded_keypoints_[1, :, 0] - padded_keypoints_[0, :, 0])))
     self.assertTrue(np.all((keypoints_[1, :, 1] - keypoints_[0, :, 1]) >= (
         padded_keypoints_[1, :, 1] - padded_keypoints_[0, :, 1])))
+    if include_dense_pose:
+      dp_surface_coords = outputs[11]
+      padded_dp_surface_coords = outputs[12]
+      self.assertAllClose(padded_dp_surface_coords[:, :, 2:],
+                          dp_surface_coords[:, :, 2:])
 
   def testRandomAbsolutePadImage(self):
     height_padding = 10

research/object_detection/dataset_tools/context_rcnn/add_context_to_examples.py

@@ -43,6 +43,7 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
+import argparse
 import copy
 import datetime
 import io
@@ -51,62 +52,11 @@ import json
 import os
 
 from absl import app
-from absl import flags
 import apache_beam as beam
 import numpy as np
 import PIL.Image
 import six
-import tensorflow as tf
-
-from apache_beam import runners
-
-
-flags.DEFINE_string('input_tfrecord', None, 'TFRecord containing images in '
-                    'tf.Example format for object detection, with bounding'
-                    'boxes and contextual feature embeddings.')
-flags.DEFINE_string('output_tfrecord', None,
-                    'TFRecord containing images in tf.Example format, with '
-                    'added contextual memory banks.')
-flags.DEFINE_string('sequence_key', None, 'Key to use when grouping sequences: '
-                    'so far supports `image/seq_id` and `image/location`.')
-flags.DEFINE_string('time_horizon', None, 'What time horizon to use when '
-                    'splitting the data, if any. Options are: `year`, `month`,'
-                    ' `week`, `day `, `hour`, `minute`, `None`.')
-flags.DEFINE_integer('subsample_context_features_rate', 0, 'Whether to '
-                     'subsample the context_features, and if so how many to '
-                     'sample. If the rate is set to X, it will sample context '
-                     'from 1 out of every X images. Default is sampling from '
-                     'every image, which is X=0.')
-flags.DEFINE_boolean('reduce_image_size', True, 'downsamples images to'
-                     'have longest side max_image_dimension, maintaining aspect'
-                     ' ratio')
-flags.DEFINE_integer('max_image_dimension', 1024, 'sets max image dimension')
-flags.DEFINE_boolean('add_context_features', True, 'adds a memory bank of'
-                     'embeddings to each clip')
-flags.DEFINE_boolean('sorted_image_ids', True, 'whether the image source_ids '
-                     'are sortable to deal with date_captured tie-breaks')
-flags.DEFINE_string('image_ids_to_keep', 'All', 'path to .json list of image'
-                    'ids to keep, used for ground truth eval creation')
-flags.DEFINE_boolean('keep_context_features_image_id_list', False, 'Whether or '
-                     'not to keep a list of the image_ids corresponding to the '
-                     'memory bank')
-flags.DEFINE_boolean('keep_only_positives', False, 'Whether or not to '
-                     'keep only positive boxes based on score')
-flags.DEFINE_boolean('keep_only_positives_gt', False, 'Whether or not to '
-                     'keep only positive boxes based on gt class')
-flags.DEFINE_float('context_features_score_threshold', 0.7, 'What score '
-                   'threshold to use for boxes in context_features')
-flags.DEFINE_integer('max_num_elements_in_context_features', 2000, 'Sets max '
-                     'num elements per memory bank')
-flags.DEFINE_integer('num_shards', 0, 'Number of output shards.')
-flags.DEFINE_string('output_type', 'tf_sequence_example', 'Output type, one of '
-                    '`tf_example`, `tf_sequence_example`')
-flags.DEFINE_integer('max_clip_length', None, 'Max length for sequence '
-                     'example outputs.')
-
-FLAGS = flags.FLAGS
-
-DEFAULT_FEATURE_LENGTH = 2057
+import tensorflow.compat.v1 as tf
 
 
 class ReKeyDataFn(beam.DoFn):
@@ -406,7 +356,8 @@ class GenerateContextFn(beam.DoFn):
                keep_only_positives_gt=False,
                max_num_elements_in_context_features=5000,
                pad_context_features=False,
-               output_type='tf_example', max_clip_length=None):
+               output_type='tf_example', max_clip_length=None,
+               context_feature_length=2057):
     """Initialization function.
 
     Args:
@@ -432,6 +383,8 @@ class GenerateContextFn(beam.DoFn):
       output_type: What type of output, tf_example of tf_sequence_example
       max_clip_length: The maximum length of a sequence example, before
         splitting into multiple
+      context_feature_length: The length of the context feature embeddings
+        stored in the input data.
     """
     self._session = None
     self._num_examples_processed = beam.metrics.Metrics.counter(
@@ -456,6 +409,7 @@ class GenerateContextFn(beam.DoFn):
     self._context_features_score_threshold = context_features_score_threshold
     self._max_num_elements_in_context_features = (
         max_num_elements_in_context_features)
+    self._context_feature_length = context_feature_length
 
     self._images_kept = beam.metrics.Metrics.counter(
         'sequence_data_generation', 'images_kept')
@@ -506,9 +460,9 @@ class GenerateContextFn(beam.DoFn):
       context_features_image_id_list.append(example_image_id)
 
     if not example_embedding:
-      example_embedding.append(np.zeros(DEFAULT_FEATURE_LENGTH))
+      example_embedding.append(np.zeros(self._context_feature_length))
 
-    feature_length = DEFAULT_FEATURE_LENGTH
+    feature_length = self._context_feature_length
 
     # If the example_list is not empty and image/embedding_length is in the
     # featture dict, feature_length will be assigned to that. Otherwise, it will
@@ -703,7 +657,8 @@ class GenerateContextFn(beam.DoFn):
     return list_of_examples
 
 
-def construct_pipeline(input_tfrecord,
+def construct_pipeline(pipeline,
+                       input_tfrecord,
                        output_tfrecord,
                        sequence_key,
                        time_horizon=None,
@@ -720,10 +675,12 @@ def construct_pipeline(input_tfrecord,
                        max_num_elements_in_context_features=5000,
                        num_shards=0,
                        output_type='tf_example',
-                       max_clip_length=None):
+                       max_clip_length=None,
+                       context_feature_length=2057):
   """Returns a beam pipeline to run object detection inference.
 
   Args:
+    pipeline: Initialized beam pipeline.
     input_tfrecord: An TFRecord of tf.train.Example protos containing images.
     output_tfrecord: An TFRecord of tf.train.Example protos that contain images
       in the input TFRecord and the detections from the model.
@@ -755,8 +712,9 @@ def construct_pipeline(input_tfrecord,
     output_type: What type of output, tf_example of tf_sequence_example
     max_clip_length: The maximum length of a sequence example, before
       splitting into multiple
+    context_feature_length: The length of the context feature embeddings stored
+      in the input data.
   """
-  def pipeline(root):
   if output_type == 'tf_example':
     coder = beam.coders.ProtoCoder(tf.train.Example)
   elif output_type == 'tf_sequence_example':
@@ -764,7 +722,7 @@ def construct_pipeline(input_tfrecord,
   else:
     raise ValueError('Unsupported output type.')
   input_collection = (
-        root | 'ReadInputTFRecord' >> beam.io.tfrecordio.ReadFromTFRecord(
+      pipeline | 'ReadInputTFRecord' >> beam.io.tfrecordio.ReadFromTFRecord(
           input_tfrecord,
           coder=beam.coders.BytesCoder()))
   rekey_collection = input_collection | 'RekeyExamples' >> beam.ParDo(
@@ -794,7 +752,8 @@ def construct_pipeline(input_tfrecord,
               max_num_elements_in_context_features=(
                   max_num_elements_in_context_features),
               output_type=output_type,
-                max_clip_length=max_clip_length)))
+              max_clip_length=max_clip_length,
+              context_feature_length=context_feature_length)))
 
   output_collection = (
       output_collection | 'ReshuffleExamples' >> beam.Reshuffle())
@@ -802,44 +761,175 @@ def construct_pipeline(input_tfrecord,
       output_tfrecord,
       num_shards=num_shards,
       coder=coder)
-  return pipeline
 
 
-def main(_):
-  """Runs the Beam pipeline that builds context features.
+def parse_args(argv):
+  """Command-line argument parser.
 
   Args:
-    _: unused
+    argv: command line arguments
+  Returns:
+    beam_args: Arguments for the beam pipeline.
+    pipeline_args: Arguments for the pipeline options, such as runner type.
   """
-  # must create before flags are used
-  runner = runners.DirectRunner()
+  parser = argparse.ArgumentParser()
+  parser.add_argument(
+      '--input_tfrecord',
+      dest='input_tfrecord',
+      required=True,
+      help='TFRecord containing images in tf.Example format for object '
+      'detection, with bounding boxes and contextual feature embeddings.')
+  parser.add_argument(
+      '--output_tfrecord',
+      dest='output_tfrecord',
+      required=True,
+      help='TFRecord containing images in tf.Example format, with added '
+      'contextual memory banks.')
+  parser.add_argument(
+      '--sequence_key',
+      dest='sequence_key',
+      default='image/location',
+      help='Key to use when grouping sequences: so far supports `image/seq_id` '
+      'and `image/location`.')
+  parser.add_argument(
+      '--context_feature_length',
+      dest='context_feature_length',
+      default=2057,
+      help='The length of the context feature embeddings stored in the input '
+      'data.')
+  parser.add_argument(
+      '--time_horizon',
+      dest='time_horizon',
+      default=None,
+      help='What time horizon to use when splitting the data, if any. Options '
+      'are: `year`, `month`, `week`, `day `, `hour`, `minute`, `None`.')
+  parser.add_argument(
+      '--subsample_context_features_rate',
+      dest='subsample_context_features_rate',
+      default=0,
+      help='Whether to subsample the context_features, and if so how many to '
+      'sample. If the rate is set to X, it will sample context from 1 out of '
+      'every X images. Default is sampling from every image, which is X=0.')
+  parser.add_argument(
+      '--reduce_image_size',
+      dest='reduce_image_size',
+      default=True,
+      help='downsamples images to have longest side max_image_dimension, '
+      'maintaining aspect ratio')
+  parser.add_argument(
+      '--max_image_dimension',
+      dest='max_image_dimension',
+      default=1024,
+      help='Sets max image dimension for resizing.')
+  parser.add_argument(
+      '--add_context_features',
+      dest='add_context_features',
+      default=True,
+      help='Adds a memory bank of embeddings to each clip')
+  parser.add_argument(
+      '--sorted_image_ids',
+      dest='sorted_image_ids',
+      default=True,
+      help='Whether the image source_ids are sortable to deal with '
+      'date_captured tie-breaks.')
+  parser.add_argument(
+      '--image_ids_to_keep',
+      dest='image_ids_to_keep',
+      default='All',
+      help='Path to .json list of image ids to keep, used for ground truth '
+      'eval creation.')
+  parser.add_argument(
+      '--keep_context_features_image_id_list',
+      dest='keep_context_features_image_id_list',
+      default=False,
+      help='Whether or not to keep a list of the image_ids corresponding to '
+      'the memory bank.')
+  parser.add_argument(
+      '--keep_only_positives',
+      dest='keep_only_positives',
+      default=False,
+      help='Whether or not to keep only positive boxes based on score.')
+  parser.add_argument(
+      '--context_features_score_threshold',
+      dest='context_features_score_threshold',
+      default=0.7,
+      help='What score threshold to use for boxes in context_features, when '
+      '`keep_only_positives` is set to `True`.')
+  parser.add_argument(
+      '--keep_only_positives_gt',
+      dest='keep_only_positives_gt',
+      default=False,
+      help='Whether or not to keep only positive boxes based on gt class.')
+  parser.add_argument(
+      '--max_num_elements_in_context_features',
+      dest='max_num_elements_in_context_features',
+      default=2000,
+      help='Sets max number of context feature elements per memory bank. '
+      'If the number of images in the context group is greater than '
+      '`max_num_elements_in_context_features`, the context group will be split.'
+      )
+  parser.add_argument(
+      '--output_type',
+      dest='output_type',
+      default='tf_example',
+      help='Output type, one of `tf_example`, `tf_sequence_example`.')
+  parser.add_argument(
+      '--max_clip_length',
+      dest='max_clip_length',
+      default=None,
+      help='Max length for sequence example outputs.')
+  parser.add_argument(
+      '--num_shards',
+      dest='num_shards',
+      default=0,
+      help='Number of output shards.')
+  beam_args, pipeline_args = parser.parse_known_args(argv)
+  return beam_args, pipeline_args
+
+
+def main(argv=None, save_main_session=True):
+  """Runs the Beam pipeline that performs inference.
 
-  dirname = os.path.dirname(FLAGS.output_tfrecord)
+  Args:
+    argv: Command line arguments.
+    save_main_session: Whether to save the main session.
+  """
+  args, pipeline_args = parse_args(argv)
+
+  pipeline_options = beam.options.pipeline_options.PipelineOptions(
+            pipeline_args)
+  pipeline_options.view_as(
+      beam.options.pipeline_options.SetupOptions).save_main_session = (
+          save_main_session)
+
+  dirname = os.path.dirname(args.output_tfrecord)
   tf.io.gfile.makedirs(dirname)
-  runner.run(
-      construct_pipeline(FLAGS.input_tfrecord,
-                         FLAGS.output_tfrecord,
-                         FLAGS.sequence_key,
-                         FLAGS.time_horizon,
-                         FLAGS.subsample_context_features_rate,
-                         FLAGS.reduce_image_size,
-                         FLAGS.max_image_dimension,
-                         FLAGS.add_context_features,
-                         FLAGS.sorted_image_ids,
-                         FLAGS.image_ids_to_keep,
-                         FLAGS.keep_context_features_image_id_list,
-                         FLAGS.keep_only_positives,
-                         FLAGS.context_features_score_threshold,
-                         FLAGS.keep_only_positives_gt,
-                         FLAGS.max_num_elements_in_context_features,
-                         FLAGS.num_shards,
-                         FLAGS.output_type,
-                         FLAGS.max_clip_length))
+
+  p = beam.Pipeline(options=pipeline_options)
+
+  construct_pipeline(
+      p,
+      args.input_tfrecord,
+      args.output_tfrecord,
+      args.sequence_key,
+      args.time_horizon,
+      args.subsample_context_features_rate,
+      args.reduce_image_size,
+      args.max_image_dimension,
+      args.add_context_features,
+      args.sorted_image_ids,
+      args.image_ids_to_keep,
+      args.keep_context_features_image_id_list,
+      args.keep_only_positives,
+      args.context_features_score_threshold,
+      args.keep_only_positives_gt,
+      args.max_num_elements_in_context_features,
+      args.output_type,
+      args.max_clip_length,
+      args.context_feature_length)
+
+  p.run()
 
 
 if __name__ == '__main__':
-  flags.mark_flags_as_required([
-      'input_tfrecord',
-      'output_tfrecord'
-  ])
   app.run(main)

research/object_detection/dataset_tools/context_rcnn/add_context_to_examples_tf1_test.py

@@ -22,13 +22,13 @@ import datetime
 import os
 import tempfile
 import unittest
+import apache_beam as beam
 import numpy as np
 import six
 import tensorflow.compat.v1 as tf
 
 from object_detection.dataset_tools.context_rcnn import add_context_to_examples
 from object_detection.utils import tf_version
-from apache_beam import runners
 
 
 @contextlib.contextmanager
@@ -329,19 +329,22 @@ class GenerateContextDataTest(tf.test.TestCase):
     with InMemoryTFRecord(
         [self._create_first_tf_example(),
          self._create_second_tf_example()]) as input_tfrecord:
-      runner = runners.DirectRunner()
       temp_dir = tempfile.mkdtemp(dir=os.environ.get('TEST_TMPDIR'))
       output_tfrecord = os.path.join(temp_dir, 'output_tfrecord')
       sequence_key = six.ensure_binary('image/seq_id')
       max_num_elements = 10
       num_shards = 1
-      pipeline = add_context_to_examples.construct_pipeline(
+      pipeline_options = beam.options.pipeline_options.PipelineOptions(
+          runner='DirectRunner')
+      p = beam.Pipeline(options=pipeline_options)
+      add_context_to_examples.construct_pipeline(
+          p,
           input_tfrecord,
           output_tfrecord,
           sequence_key,
           max_num_elements_in_context_features=max_num_elements,
           num_shards=num_shards)
-      runner.run(pipeline)
+      p.run()
       filenames = tf.io.gfile.glob(output_tfrecord + '-?????-of-?????')
       actual_output = []
       record_iterator = tf.python_io.tf_record_iterator(path=filenames[0])
@@ -355,20 +358,23 @@ class GenerateContextDataTest(tf.test.TestCase):
     with InMemoryTFRecord(
         [self._create_first_tf_example(),
          self._create_second_tf_example()]) as input_tfrecord:
-      runner = runners.DirectRunner()
       temp_dir = tempfile.mkdtemp(dir=os.environ.get('TEST_TMPDIR'))
       output_tfrecord = os.path.join(temp_dir, 'output_tfrecord')
       sequence_key = six.ensure_binary('image/seq_id')
       max_num_elements = 10
       num_shards = 1
-      pipeline = add_context_to_examples.construct_pipeline(
+      pipeline_options = beam.options.pipeline_options.PipelineOptions(
+          runner='DirectRunner')
+      p = beam.Pipeline(options=pipeline_options)
+      add_context_to_examples.construct_pipeline(
+          p,
           input_tfrecord,
           output_tfrecord,
           sequence_key,
           max_num_elements_in_context_features=max_num_elements,
           num_shards=num_shards,
           output_type='tf_sequence_example')
-      runner.run(pipeline)
+      p.run()
       filenames = tf.io.gfile.glob(output_tfrecord + '-?????-of-?????')
       actual_output = []
       record_iterator = tf.python_io.tf_record_iterator(

research/object_detection/dataset_tools/context_rcnn/create_cococameratraps_tfexample_main.py

@@ -33,32 +33,19 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
+import argparse
 import hashlib
 import io
 import json
 import logging
 import os
 from absl import app
-from absl import flags
 import apache_beam as beam
 import numpy as np
 import PIL.Image
 import tensorflow.compat.v1 as tf
-from apache_beam import runners
 from object_detection.utils import dataset_util
 
-flags.DEFINE_string('image_directory', None, 'Directory where images are '
-                    'stored')
-flags.DEFINE_string('output_tfrecord_prefix', None,
-                    'TFRecord containing images in tf.Example format.')
-flags.DEFINE_string('input_annotations_file', None, 'Path to Coco-CameraTraps'
-                    'style annotations file')
-flags.DEFINE_integer('num_images_per_shard',
-                     200,
-                     'The number of  images to be stored in each shard.')
-
-FLAGS = flags.FLAGS
-
 
 class ParseImage(beam.DoFn):
   """A DoFn that parses a COCO-CameraTraps json and emits TFRecords."""
@@ -243,13 +230,14 @@ class ParseImage(beam.DoFn):
     return [(example)]
 
 
-def _load_json_data(data_file):
+def load_json_data(data_file):
   with tf.io.gfile.GFile(data_file, 'r') as fid:
     data_dict = json.load(fid)
   return data_dict
 
 
-def create_pipeline(image_directory,
+def create_pipeline(pipeline,
+                    image_directory,
                     input_annotations_file,
                     output_tfrecord_prefix=None,
                     num_images_per_shard=200,
@@ -257,29 +245,23 @@ def create_pipeline(image_directory,
   """Creates a beam pipeline for producing a COCO-CameraTraps Image dataset.
 
   Args:
+    pipeline: Initialized beam pipeline.
     image_directory: Path to image directory
     input_annotations_file: Path to a coco-cameratraps annotation file
     output_tfrecord_prefix: Absolute path for tfrecord outputs. Final files will
       be named {output_tfrecord_prefix}@N.
     num_images_per_shard: The number of images to store in each shard
     keep_bboxes: Whether to keep any bounding boxes that exist in the json file
-
-  Returns:
-    A Beam pipeline.
   """
 
   logging.info('Reading data from COCO-CameraTraps Dataset.')
 
-  data = _load_json_data(input_annotations_file)
+  data = load_json_data(input_annotations_file)
 
   num_shards = int(np.ceil(float(len(data['images']))/num_images_per_shard))
 
-  def pipeline(root):
-    """Builds beam pipeline."""
-
   image_examples = (
-        root
-        | ('CreateCollections') >> beam.Create(
+      pipeline | ('CreateCollections') >> beam.Create(
           [im['id'] for im in data['images']])
       | ('ParseImage') >> beam.ParDo(ParseImage(
           image_directory, data['images'], data['annotations'],
@@ -291,34 +273,69 @@ def create_pipeline(image_directory,
            num_shards=num_shards,
            coder=beam.coders.ProtoCoder(tf.train.Example)))
 
-  return pipeline
 
+def parse_args(argv):
+  """Command-line argument parser.
 
-def main(_):
+  Args:
+    argv: command line arguments
+  Returns:
+    beam_args: Arguments for the beam pipeline.
+    pipeline_args: Arguments for the pipeline options, such as runner type.
+  """
+  parser = argparse.ArgumentParser()
+  parser.add_argument(
+      '--image_directory',
+      dest='image_directory',
+      required=True,
+      help='Path to the directory where the images are stored.')
+  parser.add_argument(
+      '--output_tfrecord_prefix',
+      dest='output_tfrecord_prefix',
+      required=True,
+      help='Path and prefix to store TFRecords containing images in tf.Example'
+      'format.')
+  parser.add_argument(
+      '--input_annotations_file',
+      dest='input_annotations_file',
+      required=True,
+      help='Path to Coco-CameraTraps style annotations file.')
+  parser.add_argument(
+      '--num_images_per_shard',
+      dest='num_images_per_shard',
+      default=200,
+      help='The number of  images to be stored in each outputshard.')
+  beam_args, pipeline_args = parser.parse_known_args(argv)
+  return beam_args, pipeline_args
+
+
+def main(argv=None, save_main_session=True):
   """Runs the Beam pipeline that performs inference.
 
   Args:
-    _: unused
+    argv: Command line arguments.
+    save_main_session: Whether to save the main session.
   """
+  args, pipeline_args = parse_args(argv)
 
-  # must create before flags are used
-  runner = runners.DirectRunner()
+  pipeline_options = beam.options.pipeline_options.PipelineOptions(
+            pipeline_args)
+  pipeline_options.view_as(
+      beam.options.pipeline_options.SetupOptions).save_main_session = (
+          save_main_session)
 
-  dirname = os.path.dirname(FLAGS.output_tfrecord_prefix)
+  dirname = os.path.dirname(args.output_tfrecord_prefix)
   tf.io.gfile.makedirs(dirname)
 
-  runner.run(
+  p = beam.Pipeline(options=pipeline_options)
   create_pipeline(
-          image_directory=FLAGS.image_directory,
-          input_annotations_file=FLAGS.input_annotations_file,
-          output_tfrecord_prefix=FLAGS.output_tfrecord_prefix,
-          num_images_per_shard=FLAGS.num_images_per_shard))
+      pipeline=p,
+      image_directory=args.image_directory,
+      input_annotations_file=args.input_annotations_file,
+      output_tfrecord_prefix=args.output_tfrecord_prefix,
+      num_images_per_shard=args.num_images_per_shard)
+  p.run()
 
 
 if __name__ == '__main__':
-  flags.mark_flags_as_required([
-      'image_directory',
-      'input_annotations_file',
-      'output_tfrecord_prefix'
-  ])
   app.run(main)

research/object_detection/dataset_tools/context_rcnn/create_cococameratraps_tfexample_tf1_test.py

@@ -21,13 +21,14 @@ import json
 import os
 import tempfile
 import unittest
+
+import apache_beam as beam
 import numpy as np
 
 from PIL import Image
 import tensorflow.compat.v1 as tf
 from object_detection.dataset_tools.context_rcnn import create_cococameratraps_tfexample_main
 from object_detection.utils import tf_version
-from apache_beam import runners
 
 
 @unittest.skipIf(tf_version.is_tf2(), 'Skipping TF1.X only test.')
@@ -156,16 +157,18 @@ class CreateCOCOCameraTrapsTfexampleTest(tf.test.TestCase):
         example.features.feature['image/encoded'].bytes_list.value)
 
   def test_beam_pipeline(self):
-    runner = runners.DirectRunner()
     num_frames = 1
     temp_dir = tempfile.mkdtemp(dir=os.environ.get('TEST_TMPDIR'))
     json_path = self._create_json_file(temp_dir, num_frames)
     output_tfrecord = temp_dir+'/output'
     self._write_random_images_to_directory(temp_dir, num_frames)
-    pipeline = create_cococameratraps_tfexample_main.create_pipeline(
-        temp_dir, json_path,
+    pipeline_options = beam.options.pipeline_options.PipelineOptions(
+        runner='DirectRunner')
+    p = beam.Pipeline(options=pipeline_options)
+    create_cococameratraps_tfexample_main.create_pipeline(
+        p, temp_dir, json_path,
         output_tfrecord_prefix=output_tfrecord)
-    runner.run(pipeline)
+    p.run()
     filenames = tf.io.gfile.glob(output_tfrecord + '-?????-of-?????')
     actual_output = []
     record_iterator = tf.python_io.tf_record_iterator(path=filenames[0])
@@ -176,17 +179,19 @@ class CreateCOCOCameraTrapsTfexampleTest(tf.test.TestCase):
         actual_output[0]))
 
   def test_beam_pipeline_bbox(self):
-    runner = runners.DirectRunner()
     num_frames = 1
     temp_dir = tempfile.mkdtemp(dir=os.environ.get('TEST_TMPDIR'))
     json_path = self._create_json_file(temp_dir, num_frames, keep_bboxes=True)
     output_tfrecord = temp_dir+'/output'
     self._write_random_images_to_directory(temp_dir, num_frames)
-    pipeline = create_cococameratraps_tfexample_main.create_pipeline(
-        temp_dir, json_path,
+    pipeline_options = beam.options.pipeline_options.PipelineOptions(
+        runner='DirectRunner')
+    p = beam.Pipeline(options=pipeline_options)
+    create_cococameratraps_tfexample_main.create_pipeline(
+        p, temp_dir, json_path,
         output_tfrecord_prefix=output_tfrecord,
         keep_bboxes=True)
-    runner.run(pipeline)
+    p.run()
     filenames = tf.io.gfile.glob(output_tfrecord+'-?????-of-?????')
     actual_output = []
     record_iterator = tf.python_io.tf_record_iterator(path=filenames[0])

research/object_detection/dataset_tools/context_rcnn/generate_detection_data.py

@@ -45,26 +45,12 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
+import argparse
 import os
 import threading
 from absl import app
-from absl import flags
 import apache_beam as beam
 import tensorflow.compat.v1 as tf
-from apache_beam import runners
-
-
-flags.DEFINE_string('detection_input_tfrecord', None, 'TFRecord containing '
-                    'images in tf.Example format for object detection.')
-flags.DEFINE_string('detection_output_tfrecord', None,
-                    'TFRecord containing detections in tf.Example format.')
-flags.DEFINE_string('detection_model_dir', None, 'Path to directory containing'
-                    'an object detection SavedModel.')
-flags.DEFINE_float('confidence_threshold', 0.9,
-                   'Min confidence to keep bounding boxes')
-flags.DEFINE_integer('num_shards', 0, 'Number of output shards.')
-
-FLAGS = flags.FLAGS
 
 
 class GenerateDetectionDataFn(beam.DoFn):
@@ -205,23 +191,21 @@ class GenerateDetectionDataFn(beam.DoFn):
     return [example]
 
 
-def construct_pipeline(input_tfrecord, output_tfrecord, model_dir,
+def construct_pipeline(pipeline, input_tfrecord, output_tfrecord, model_dir,
                        confidence_threshold, num_shards):
   """Returns a Beam pipeline to run object detection inference.
 
   Args:
+    pipeline: Initialized beam pipeline.
     input_tfrecord: A TFRecord of tf.train.Example protos containing images.
     output_tfrecord: A TFRecord of tf.train.Example protos that contain images
       in the input TFRecord and the detections from the model.
     model_dir: Path to `saved_model` to use for inference.
     confidence_threshold: Threshold to use when keeping detection results.
     num_shards: The number of output shards.
-  Returns:
-    pipeline: A Beam pipeline.
   """
-  def pipeline(root):
   input_collection = (
-        root | 'ReadInputTFRecord' >> beam.io.tfrecordio.ReadFromTFRecord(
+      pipeline | 'ReadInputTFRecord' >> beam.io.tfrecordio.ReadFromTFRecord(
           input_tfrecord,
           coder=beam.coders.BytesCoder()))
   output_collection = input_collection | 'RunInference' >> beam.ParDo(
@@ -231,32 +215,79 @@ def construct_pipeline(input_tfrecord, output_tfrecord, model_dir,
       output_tfrecord,
       num_shards=num_shards,
       coder=beam.coders.ProtoCoder(tf.train.Example))
-  return pipeline
 
 
-def main(_):
+def parse_args(argv):
+  """Command-line argument parser.
+
+  Args:
+    argv: command line arguments
+  Returns:
+    beam_args: Arguments for the beam pipeline.
+    pipeline_args: Arguments for the pipeline options, such as runner type.
+  """
+  parser = argparse.ArgumentParser()
+  parser.add_argument(
+      '--detection_input_tfrecord',
+      dest='detection_input_tfrecord',
+      required=True,
+      help='TFRecord containing images in tf.Example format for object '
+      'detection.')
+  parser.add_argument(
+      '--detection_output_tfrecord',
+      dest='detection_output_tfrecord',
+      required=True,
+      help='TFRecord containing detections in tf.Example format.')
+  parser.add_argument(
+      '--detection_model_dir',
+      dest='detection_model_dir',
+      required=True,
+      help='Path to directory containing an object detection SavedModel.')
+  parser.add_argument(
+      '--confidence_threshold',
+      dest='confidence_threshold',
+      default=0.9,
+      help='Min confidence to keep bounding boxes.')
+  parser.add_argument(
+      '--num_shards',
+      dest='num_shards',
+      default=0,
+      help='Number of output shards.')
+  beam_args, pipeline_args = parser.parse_known_args(argv)
+  return beam_args, pipeline_args
+
+
+def main(argv=None, save_main_session=True):
   """Runs the Beam pipeline that performs inference.
 
   Args:
-    _: unused
+    argv: Command line arguments.
+    save_main_session: Whether to save the main session.
   """
-  # must create before flags are used
-  runner = runners.DirectRunner()
 
-  dirname = os.path.dirname(FLAGS.detection_output_tfrecord)
+  args, pipeline_args = parse_args(argv)
+
+  pipeline_options = beam.options.pipeline_options.PipelineOptions(
+            pipeline_args)
+  pipeline_options.view_as(
+      beam.options.pipeline_options.SetupOptions).save_main_session = (
+          save_main_session)
+
+  dirname = os.path.dirname(args.detection_output_tfrecord)
   tf.io.gfile.makedirs(dirname)
-  runner.run(
-      construct_pipeline(FLAGS.detection_input_tfrecord,
-                         FLAGS.detection_output_tfrecord,
-                         FLAGS.detection_model_dir,
-                         FLAGS.confidence_threshold,
-                         FLAGS.num_shards))
+
+  p = beam.Pipeline(options=pipeline_options)
+
+  construct_pipeline(
+      p,
+      args.detection_input_tfrecord,
+      args.detection_output_tfrecord,
+      args.detection_model_dir,
+      args.confidence_threshold,
+      args.num_shards)
+
+  p.run()
 
 
 if __name__ == '__main__':
-  flags.mark_flags_as_required([
-      'detection_input_tfrecord',
-      'detection_output_tfrecord',
-      'detection_model_dir'
-  ])
   app.run(main)

research/object_detection/dataset_tools/context_rcnn/generate_detection_data_tf1_test.py

@@ -22,6 +22,7 @@ import contextlib
 import os
 import tempfile
 import unittest
+import apache_beam as beam
 import numpy as np
 import six
 import tensorflow.compat.v1 as tf
@@ -32,7 +33,6 @@ from object_detection.core import model
 from object_detection.dataset_tools.context_rcnn import generate_detection_data
 from object_detection.protos import pipeline_pb2
 from object_detection.utils import tf_version
-from apache_beam import runners
 
 if six.PY2:
   import mock  # pylint: disable=g-import-not-at-top
@@ -246,16 +246,18 @@ class GenerateDetectionDataTest(tf.test.TestCase):
 
   def test_beam_pipeline(self):
     with InMemoryTFRecord([self._create_tf_example()]) as input_tfrecord:
-      runner = runners.DirectRunner()
       temp_dir = tempfile.mkdtemp(dir=os.environ.get('TEST_TMPDIR'))
       output_tfrecord = os.path.join(temp_dir, 'output_tfrecord')
       saved_model_path = self._export_saved_model()
       confidence_threshold = 0.8
       num_shards = 1
-      pipeline = generate_detection_data.construct_pipeline(
-          input_tfrecord, output_tfrecord, saved_model_path,
+      pipeline_options = beam.options.pipeline_options.PipelineOptions(
+          runner='DirectRunner')
+      p = beam.Pipeline(options=pipeline_options)
+      generate_detection_data.construct_pipeline(
+          p, input_tfrecord, output_tfrecord, saved_model_path,
           confidence_threshold, num_shards)
-      runner.run(pipeline)
+      p.run()
       filenames = tf.io.gfile.glob(output_tfrecord + '-?????-of-?????')
       actual_output = []
       record_iterator = tf.python_io.tf_record_iterator(path=filenames[0])

research/object_detection/dataset_tools/context_rcnn/generate_embedding_data.py

@@ -47,34 +47,17 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
+import argparse
 import datetime
 import os
 import threading
+
 from absl import app
-from absl import flags
+
 import apache_beam as beam
 import numpy as np
 import six
 import tensorflow.compat.v1 as tf
-from apache_beam import runners
-
-flags.DEFINE_string('embedding_input_tfrecord', None, 'TFRecord containing'
-                    'images in tf.Example format for object detection.')
-flags.DEFINE_string('embedding_output_tfrecord', None,
-                    'TFRecord containing embeddings in tf.Example format.')
-flags.DEFINE_string('embedding_model_dir', None, 'Path to directory containing'
-                    'an object detection SavedModel with'
-                    'detection_box_classifier_features in the output.')
-flags.DEFINE_integer('top_k_embedding_count', 1,
-                     'The number of top k embeddings to add to the memory bank.'
-                    )
-flags.DEFINE_integer('bottom_k_embedding_count', 0,
-                     'The number of bottom k embeddings to add to the memory '
-                     'bank.')
-flags.DEFINE_integer('num_shards', 0, 'Number of output shards.')
-
-
-FLAGS = flags.FLAGS
 
 
 class GenerateEmbeddingDataFn(beam.DoFn):
@@ -321,12 +304,13 @@ class GenerateEmbeddingDataFn(beam.DoFn):
     return [example]
 
 
-def construct_pipeline(input_tfrecord, output_tfrecord, model_dir,
+def construct_pipeline(pipeline, input_tfrecord, output_tfrecord, model_dir,
                        top_k_embedding_count, bottom_k_embedding_count,
                        num_shards):
   """Returns a beam pipeline to run object detection inference.
 
   Args:
+    pipeline: Initialized beam pipeline.
     input_tfrecord: An TFRecord of tf.train.Example protos containing images.
     output_tfrecord: An TFRecord of tf.train.Example protos that contain images
       in the input TFRecord and the detections from the model.
@@ -335,9 +319,8 @@ def construct_pipeline(input_tfrecord, output_tfrecord, model_dir,
     bottom_k_embedding_count: The number of low-confidence embeddings to store.
     num_shards: The number of output shards.
   """
-  def pipeline(root):
   input_collection = (
-        root | 'ReadInputTFRecord' >> beam.io.tfrecordio.ReadFromTFRecord(
+      pipeline | 'ReadInputTFRecord' >> beam.io.tfrecordio.ReadFromTFRecord(
           input_tfrecord,
           coder=beam.coders.BytesCoder()))
   output_collection = input_collection | 'ExtractEmbedding' >> beam.ParDo(
@@ -348,31 +331,84 @@ def construct_pipeline(input_tfrecord, output_tfrecord, model_dir,
       output_tfrecord,
       num_shards=num_shards,
       coder=beam.coders.ProtoCoder(tf.train.Example))
-  return pipeline
 
 
-def main(_):
+def parse_args(argv):
+  """Command-line argument parser.
+
+  Args:
+    argv: command line arguments
+  Returns:
+    beam_args: Arguments for the beam pipeline.
+    pipeline_args: Arguments for the pipeline options, such as runner type.
+  """
+  parser = argparse.ArgumentParser()
+  parser.add_argument(
+      '--embedding_input_tfrecord',
+      dest='embedding_input_tfrecord',
+      required=True,
+      help='TFRecord containing images in tf.Example format for object '
+      'detection.')
+  parser.add_argument(
+      '--embedding_output_tfrecord',
+      dest='embedding_output_tfrecord',
+      required=True,
+      help='TFRecord containing embeddings in tf.Example format.')
+  parser.add_argument(
+      '--embedding_model_dir',
+      dest='embedding_model_dir',
+      required=True,
+      help='Path to directory containing an object detection SavedModel with'
+      'detection_box_classifier_features in the output.')
+  parser.add_argument(
+      '--top_k_embedding_count',
+      dest='top_k_embedding_count',
+      default=1,
+      help='The number of top k embeddings to add to the memory bank.')
+  parser.add_argument(
+      '--bottom_k_embedding_count',
+      dest='bottom_k_embedding_count',
+      default=0,
+      help='The number of bottom k embeddings to add to the memory bank.')
+  parser.add_argument(
+      '--num_shards',
+      dest='num_shards',
+      default=0,
+      help='Number of output shards.')
+  beam_args, pipeline_args = parser.parse_known_args(argv)
+  return beam_args, pipeline_args
+
+
+def main(argv=None, save_main_session=True):
   """Runs the Beam pipeline that performs inference.
 
   Args:
-    _: unused
+    argv: Command line arguments.
+    save_main_session: Whether to save the main session.
   """
-  # must create before flags are used
-  runner = runners.DirectRunner()
+  args, pipeline_args = parse_args(argv)
 
-  dirname = os.path.dirname(FLAGS.embedding_output_tfrecord)
+  pipeline_options = beam.options.pipeline_options.PipelineOptions(
+            pipeline_args)
+  pipeline_options.view_as(
+      beam.options.pipeline_options.SetupOptions).save_main_session = (
+          save_main_session)
+
+  dirname = os.path.dirname(args.embedding_output_tfrecord)
   tf.io.gfile.makedirs(dirname)
-  runner.run(
-      construct_pipeline(FLAGS.embedding_input_tfrecord,
-                         FLAGS.embedding_output_tfrecord,
-                         FLAGS.embedding_model_dir, FLAGS.top_k_embedding_count,
-                         FLAGS.bottom_k_embedding_count, FLAGS.num_shards))
 
+  p = beam.Pipeline(options=pipeline_options)
+
+  construct_pipeline(
+      p,
+      args.embedding_input_tfrecord,
+      args.embedding_output_tfrecord,
+      args.embedding_model_dir,
+      args.top_k_embedding_count,
+      args.bottom_k_embedding_count,
+      args.num_shards)
+
+  p.run()
 
 if __name__ == '__main__':
-  flags.mark_flags_as_required([
-      'embedding_input_tfrecord',
-      'embedding_output_tfrecord',
-      'embedding_model_dir'
-  ])
   app.run(main)

research/object_detection/dataset_tools/context_rcnn/generate_embedding_data_tf1_test.py

@@ -21,6 +21,7 @@ import contextlib
 import os
 import tempfile
 import unittest
+import apache_beam as beam
 import numpy as np
 import six
 import tensorflow.compat.v1 as tf
@@ -30,7 +31,7 @@ from object_detection.core import model
 from object_detection.dataset_tools.context_rcnn import generate_embedding_data
 from object_detection.protos import pipeline_pb2
 from object_detection.utils import tf_version
-from apache_beam import runners
+
 
 if six.PY2:
   import mock  # pylint: disable=g-import-not-at-top
@@ -314,17 +315,19 @@ class GenerateEmbeddingData(tf.test.TestCase):
 
   def test_beam_pipeline(self):
     with InMemoryTFRecord([self._create_tf_example()]) as input_tfrecord:
-      runner = runners.DirectRunner()
       temp_dir = tempfile.mkdtemp(dir=os.environ.get('TEST_TMPDIR'))
       output_tfrecord = os.path.join(temp_dir, 'output_tfrecord')
       saved_model_path = self._export_saved_model()
       top_k_embedding_count = 1
       bottom_k_embedding_count = 0
       num_shards = 1
-      pipeline = generate_embedding_data.construct_pipeline(
-          input_tfrecord, output_tfrecord, saved_model_path,
+      pipeline_options = beam.options.pipeline_options.PipelineOptions(
+          runner='DirectRunner')
+      p = beam.Pipeline(options=pipeline_options)
+      generate_embedding_data.construct_pipeline(
+          p, input_tfrecord, output_tfrecord, saved_model_path,
           top_k_embedding_count, bottom_k_embedding_count, num_shards)
-      runner.run(pipeline)
+      p.run()
       filenames = tf.io.gfile.glob(
           output_tfrecord + '-?????-of-?????')
       actual_output = []

research/object_detection/protos/ssd.proto

@@ -145,7 +145,7 @@ message Ssd {
   optional MaskHead mask_head_config = 25;
 }
 
-// Next id: 18.
+// Next id: 19.
 message SsdFeatureExtractor {
   reserved 6;
 

research/object_detection/utils/ops_test.py

@@ -1082,7 +1082,7 @@ class OpsTestPositionSensitiveCropRegions(test_case.TestCase):
         return ps_crop_and_pool
 
       output = self.execute(graph_fn, [])
-      self.assertAllEqual(output, expected_output[crop_size_mult - 1])
+      self.assertAllClose(output, expected_output[crop_size_mult - 1])
 
   def test_raise_value_error_on_non_square_block_size(self):
     num_spatial_bins = [3, 2]