Merged commit includes the following changes:

196161788  by Zhichao Lu:

    Add eval_on_train_steps parameter.

    Since the number of samples in train dataset is usually different to the number of samples in the eval dataset.

--
196151742  by Zhichao Lu:

    Add an optional random sampling process for SSD meta arch and update mean stddev coder to use default std dev when corresponding tensor is not added to boxlist field.

--
196148940  by Zhichao Lu:

    Release ssdlite mobilenet v2 coco trained model.

--
196058528  by Zhichao Lu:

    Apply FPN feature map generation before we add additional layers on top of resnet feature extractor.

--
195818367  by Zhichao Lu:

    Add support for exporting detection keypoints.

--
195745420  by Zhichao Lu:

    Introduce include_metrics_per_category option to Object Detection eval_config.

--
195734733  by Zhichao Lu:

    Rename SSDLite config to be more explicit.

--
195717383  by Zhichao Lu:

    Add quantized training to object_detection.

--
195683542  by...

research/object_detection/box_coders/mean_stddev_box_coder.py

@@ -25,6 +25,14 @@ from object_detection.core import box_list
 class MeanStddevBoxCoder(box_coder.BoxCoder):
   """Mean stddev box coder."""
 
+  def __init__(self, stddev=0.01):
+    """Constructor for MeanStddevBoxCoder.
+
+    Args:
+      stddev: The standard deviation used to encode and decode boxes.
+    """
+    self._stddev = stddev
+
   @property
   def code_size(self):
     return 4
@@ -34,37 +42,38 @@ class MeanStddevBoxCoder(box_coder.BoxCoder):
 
     Args:
       boxes: BoxList holding N boxes to be encoded.
-      anchors: BoxList of N anchors.  We assume that anchors has an associated
-        stddev field.
+      anchors: BoxList of N anchors.
 
     Returns:
       a tensor representing N anchor-encoded boxes
+
     Raises:
-      ValueError: if the anchors BoxList does not have a stddev field
+      ValueError: if the anchors still have deprecated stddev field.
     """
-    if not anchors.has_field('stddev'):
-      raise ValueError('anchors must have a stddev field')
     box_corners = boxes.get()
+    if anchors.has_field('stddev'):
+      raise ValueError("'stddev' is a parameter of MeanStddevBoxCoder and "
+                       "should not be specified in the box list.")
     means = anchors.get()
-    stddev = anchors.get_field('stddev')
-    return (box_corners - means) / stddev
+    return (box_corners - means) / self._stddev
 
   def _decode(self, rel_codes, anchors):
     """Decode.
 
     Args:
       rel_codes: a tensor representing N anchor-encoded boxes.
-      anchors: BoxList of anchors.  We assume that anchors has an associated
-        stddev field.
+      anchors: BoxList of anchors.
 
     Returns:
       boxes: BoxList holding N bounding boxes
+
     Raises:
-      ValueError: if the anchors BoxList does not have a stddev field
+      ValueError: if the anchors still have deprecated stddev field and expects
+        the decode method to use stddev value from that field.
     """
-    if not anchors.has_field('stddev'):
-      raise ValueError('anchors must have a stddev field')
     means = anchors.get()
-    stddevs = anchors.get_field('stddev')
-    box_corners = rel_codes * stddevs + means
+    if anchors.has_field('stddev'):
+      raise ValueError("'stddev' is a parameter of MeanStddevBoxCoder and "
+                       "should not be specified in the box list.")
+    box_corners = rel_codes * self._stddev + means
     return box_list.BoxList(box_corners)

research/object_detection/box_coders/mean_stddev_box_coder_test.py

@@ -28,11 +28,9 @@ class MeanStddevBoxCoderTest(tf.test.TestCase):
     boxes = box_list.BoxList(tf.constant(box_corners))
     expected_rel_codes = [[0.0, 0.0, 0.0, 0.0], [-5.0, -5.0, -5.0, -3.0]]
     prior_means = tf.constant([[0.0, 0.0, 0.5, 0.5], [0.5, 0.5, 1.0, 0.8]])
-    prior_stddevs = tf.constant(2 * [4 * [.1]])
     priors = box_list.BoxList(prior_means)
-    priors.add_field('stddev', prior_stddevs)
 
-    coder = mean_stddev_box_coder.MeanStddevBoxCoder()
+    coder = mean_stddev_box_coder.MeanStddevBoxCoder(stddev=0.1)
     rel_codes = coder.encode(boxes, priors)
     with self.test_session() as sess:
       rel_codes_out = sess.run(rel_codes)
@@ -42,11 +40,9 @@ class MeanStddevBoxCoderTest(tf.test.TestCase):
     rel_codes = tf.constant([[0.0, 0.0, 0.0, 0.0], [-5.0, -5.0, -5.0, -3.0]])
     expected_box_corners = [[0.0, 0.0, 0.5, 0.5], [0.0, 0.0, 0.5, 0.5]]
     prior_means = tf.constant([[0.0, 0.0, 0.5, 0.5], [0.5, 0.5, 1.0, 0.8]])
-    prior_stddevs = tf.constant(2 * [4 * [.1]])
     priors = box_list.BoxList(prior_means)
-    priors.add_field('stddev', prior_stddevs)
 
-    coder = mean_stddev_box_coder.MeanStddevBoxCoder()
+    coder = mean_stddev_box_coder.MeanStddevBoxCoder(stddev=0.1)
     decoded_boxes = coder.decode(rel_codes, priors)
     decoded_box_corners = decoded_boxes.get()
     with self.test_session() as sess:

research/object_detection/builders/box_coder_builder.py

@@ -55,7 +55,8 @@ def build(box_coder_config):
         ])
   if (box_coder_config.WhichOneof('box_coder_oneof') ==
       'mean_stddev_box_coder'):
-    return mean_stddev_box_coder.MeanStddevBoxCoder()
+    return mean_stddev_box_coder.MeanStddevBoxCoder(
+        stddev=box_coder_config.mean_stddev_box_coder.stddev)
   if box_coder_config.WhichOneof('box_coder_oneof') == 'square_box_coder':
     return square_box_coder.SquareBoxCoder(scale_factors=[
         box_coder_config.square_box_coder.y_scale,

research/object_detection/builders/graph_rewriter_builder.py

+# Copyright 2018 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.
+# ==============================================================================
+"""Functions for quantized training and evaluation."""
+
+import tensorflow as tf
+
+
+def build(graph_rewriter_config, is_training):
+  """Returns a function that modifies default graph based on options.
+
+  Args:
+    graph_rewriter_config: graph_rewriter_pb2.GraphRewriter proto.
+    is_training: whether in training of eval mode.
+  """
+  def graph_rewrite_fn():
+    """Function to quantize weights and activation of the default graph."""
+    if (graph_rewriter_config.quantization.weight_bits != 8 or
+        graph_rewriter_config.quantization.activation_bits != 8):
+      raise ValueError('Only 8bit quantization is supported')
+
+    # Quantize the graph by inserting quantize ops for weights and activations
+    if is_training:
+      tf.contrib.quantize.create_training_graph(
+          input_graph=tf.get_default_graph(),
+          quant_delay=graph_rewriter_config.quantization.delay)
+    else:
+      tf.contrib.quantize.create_eval_graph(input_graph=tf.get_default_graph())
+
+    tf.contrib.layers.summarize_collection('quant_vars')
+  return graph_rewrite_fn

research/object_detection/builders/graph_rewriter_builder_test.py

+# Copyright 2018 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 graph_rewriter_builder."""
+import mock
+import tensorflow as tf
+from object_detection.builders import graph_rewriter_builder
+from object_detection.protos import graph_rewriter_pb2
+
+
+class QuantizationBuilderTest(tf.test.TestCase):
+
+  def testQuantizationBuilderSetsUpCorrectTrainArguments(self):
+    with mock.patch.object(
+        tf.contrib.quantize, 'create_training_graph') as mock_quant_fn:
+      with mock.patch.object(tf.contrib.layers,
+                             'summarize_collection') as mock_summarize_col:
+        graph_rewriter_proto = graph_rewriter_pb2.GraphRewriter()
+        graph_rewriter_proto.quantization.delay = 10
+        graph_rewriter_proto.quantization.weight_bits = 8
+        graph_rewriter_proto.quantization.activation_bits = 8
+        graph_rewrite_fn = graph_rewriter_builder.build(
+            graph_rewriter_proto, is_training=True)
+        graph_rewrite_fn()
+        _, kwargs = mock_quant_fn.call_args
+        self.assertEqual(kwargs['input_graph'], tf.get_default_graph())
+        self.assertEqual(kwargs['quant_delay'], 10)
+        mock_summarize_col.assert_called_with('quant_vars')
+
+  def testQuantizationBuilderSetsUpCorrectEvalArguments(self):
+    with mock.patch.object(tf.contrib.quantize,
+                           'create_eval_graph') as mock_quant_fn:
+      with mock.patch.object(tf.contrib.layers,
+                             'summarize_collection') as mock_summarize_col:
+        graph_rewriter_proto = graph_rewriter_pb2.GraphRewriter()
+        graph_rewriter_proto.quantization.delay = 10
+        graph_rewrite_fn = graph_rewriter_builder.build(
+            graph_rewriter_proto, is_training=False)
+        graph_rewrite_fn()
+        _, kwargs = mock_quant_fn.call_args
+        self.assertEqual(kwargs['input_graph'], tf.get_default_graph())
+        mock_summarize_col.assert_called_with('quant_vars')
+
+
+if __name__ == '__main__':
+  tf.test.main()

research/object_detection/builders/losses_builder.py

@@ -15,6 +15,7 @@
 
 """A function to build localization and classification losses from config."""
 
+from object_detection.core import balanced_positive_negative_sampler as sampler
 from object_detection.core import losses
 from object_detection.protos import losses_pb2
 
@@ -34,9 +35,12 @@ def build(loss_config):
     classification_weight: Classification loss weight.
     localization_weight: Localization loss weight.
     hard_example_miner: Hard example miner object.
+    random_example_sampler: BalancedPositiveNegativeSampler object.
 
   Raises:
     ValueError: If hard_example_miner is used with sigmoid_focal_loss.
+    ValueError: If random_example_sampler is getting non-positive value as
+      desired positive example fraction.
   """
   classification_loss = _build_classification_loss(
       loss_config.classification_loss)
@@ -54,9 +58,16 @@ def build(loss_config):
         loss_config.hard_example_miner,
         classification_weight,
         localization_weight)
-  return (classification_loss, localization_loss,
-          classification_weight,
-          localization_weight, hard_example_miner)
+  random_example_sampler = None
+  if loss_config.HasField('random_example_sampler'):
+    if loss_config.random_example_sampler.positive_sample_fraction <= 0:
+      raise ValueError('RandomExampleSampler should not use non-positive'
+                       'value as positive sample fraction.')
+    random_example_sampler = sampler.BalancedPositiveNegativeSampler(
+        positive_fraction=loss_config.random_example_sampler.
+        positive_sample_fraction)
+  return (classification_loss, localization_loss, classification_weight,
+          localization_weight, hard_example_miner, random_example_sampler)
 
 
 def build_hard_example_miner(config,

research/object_detection/builders/losses_builder_test.py

@@ -38,7 +38,7 @@ class LocalizationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    _, localization_loss, _, _, _ = losses_builder.build(losses_proto)
+    _, localization_loss, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(localization_loss,
                                losses.WeightedL2LocalizationLoss))
 
@@ -55,7 +55,7 @@ class LocalizationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    _, localization_loss, _, _, _ = losses_builder.build(losses_proto)
+    _, localization_loss, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(localization_loss,
                                losses.WeightedSmoothL1LocalizationLoss))
     self.assertAlmostEqual(localization_loss._delta, 1.0)
@@ -74,7 +74,7 @@ class LocalizationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    _, localization_loss, _, _, _ = losses_builder.build(losses_proto)
+    _, localization_loss, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(localization_loss,
                                losses.WeightedSmoothL1LocalizationLoss))
     self.assertAlmostEqual(localization_loss._delta, 0.1)
@@ -92,7 +92,7 @@ class LocalizationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    _, localization_loss, _, _, _ = losses_builder.build(losses_proto)
+    _, localization_loss, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(localization_loss,
                                losses.WeightedIOULocalizationLoss))
 
@@ -109,7 +109,7 @@ class LocalizationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    _, localization_loss, _, _, _ = losses_builder.build(losses_proto)
+    _, localization_loss, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(localization_loss,
                                losses.WeightedSmoothL1LocalizationLoss))
     predictions = tf.constant([[[0.0, 0.0, 1.0, 1.0], [0.0, 0.0, 1.0, 1.0]]])
@@ -146,7 +146,7 @@ class ClassificationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
+    classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(classification_loss,
                                losses.WeightedSigmoidClassificationLoss))
 
@@ -163,7 +163,7 @@ class ClassificationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
+    classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(classification_loss,
                                losses.SigmoidFocalClassificationLoss))
     self.assertAlmostEqual(classification_loss._alpha, None)
@@ -184,7 +184,7 @@ class ClassificationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
+    classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(classification_loss,
                                losses.SigmoidFocalClassificationLoss))
     self.assertAlmostEqual(classification_loss._alpha, 0.25)
@@ -203,7 +203,7 @@ class ClassificationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
+    classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(classification_loss,
                                losses.WeightedSoftmaxClassificationLoss))
 
@@ -220,7 +220,7 @@ class ClassificationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
+    classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(
         isinstance(classification_loss,
                    losses.WeightedSoftmaxClassificationAgainstLogitsLoss))
@@ -239,7 +239,7 @@ class ClassificationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
+    classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(classification_loss,
                                losses.WeightedSoftmaxClassificationLoss))
 
@@ -257,7 +257,7 @@ class ClassificationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
+    classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(classification_loss,
                                losses.BootstrappedSigmoidClassificationLoss))
 
@@ -275,7 +275,7 @@ class ClassificationLossBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    classification_loss, _, _, _, _ = losses_builder.build(losses_proto)
+    classification_loss, _, _, _, _, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(classification_loss,
                                losses.WeightedSigmoidClassificationLoss))
     predictions = tf.constant([[[0.0, 1.0, 0.0], [0.0, 0.5, 0.5]]])
@@ -312,7 +312,7 @@ class HardExampleMinerBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    _, _, _, _, hard_example_miner = losses_builder.build(losses_proto)
+    _, _, _, _, hard_example_miner, _ = losses_builder.build(losses_proto)
     self.assertEqual(hard_example_miner, None)
 
   def test_build_hard_example_miner_for_classification_loss(self):
@@ -331,7 +331,7 @@ class HardExampleMinerBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    _, _, _, _, hard_example_miner = losses_builder.build(losses_proto)
+    _, _, _, _, hard_example_miner, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(hard_example_miner, losses.HardExampleMiner))
     self.assertEqual(hard_example_miner._loss_type, 'cls')
 
@@ -351,7 +351,7 @@ class HardExampleMinerBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    _, _, _, _, hard_example_miner = losses_builder.build(losses_proto)
+    _, _, _, _, hard_example_miner, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(hard_example_miner, losses.HardExampleMiner))
     self.assertEqual(hard_example_miner._loss_type, 'loc')
 
@@ -375,7 +375,7 @@ class HardExampleMinerBuilderTest(tf.test.TestCase):
     """
     losses_proto = losses_pb2.Loss()
     text_format.Merge(losses_text_proto, losses_proto)
-    _, _, _, _, hard_example_miner = losses_builder.build(losses_proto)
+    _, _, _, _, hard_example_miner, _ = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(hard_example_miner, losses.HardExampleMiner))
     self.assertEqual(hard_example_miner._num_hard_examples, 32)
     self.assertAlmostEqual(hard_example_miner._iou_threshold, 0.5)
@@ -404,7 +404,7 @@ class LossBuilderTest(tf.test.TestCase):
     text_format.Merge(losses_text_proto, losses_proto)
     (classification_loss, localization_loss,
      classification_weight, localization_weight,
-     hard_example_miner) = losses_builder.build(losses_proto)
+     hard_example_miner, _) = losses_builder.build(losses_proto)
     self.assertTrue(isinstance(hard_example_miner, losses.HardExampleMiner))
     self.assertTrue(isinstance(classification_loss,
                                losses.WeightedSoftmaxClassificationLoss))

research/object_detection/builders/model_builder.py

@@ -180,8 +180,8 @@ def _build_ssd_model(ssd_config, is_training, add_summaries,
   non_max_suppression_fn, score_conversion_fn = post_processing_builder.build(
       ssd_config.post_processing)
   (classification_loss, localization_loss, classification_weight,
-   localization_weight,
-   hard_example_miner) = losses_builder.build(ssd_config.loss)
+   localization_weight, hard_example_miner,
+   random_example_sampler) = losses_builder.build(ssd_config.loss)
   normalize_loss_by_num_matches = ssd_config.normalize_loss_by_num_matches
   normalize_loc_loss_by_codesize = ssd_config.normalize_loc_loss_by_codesize
 
@@ -208,7 +208,8 @@ def _build_ssd_model(ssd_config, is_training, add_summaries,
       normalize_loc_loss_by_codesize=normalize_loc_loss_by_codesize,
       freeze_batchnorm=ssd_config.freeze_batchnorm,
       inplace_batchnorm_update=ssd_config.inplace_batchnorm_update,
-      add_background_class=add_background_class)
+      add_background_class=add_background_class,
+      random_example_sampler=random_example_sampler)
 
 
 def _build_faster_rcnn_feature_extractor(

research/object_detection/core/balanced_positive_negative_sampler.py

@@ -39,6 +39,7 @@ class BalancedPositiveNegativeSampler(minibatch_sampler.MinibatchSampler):
 
     Args:
       positive_fraction: desired fraction of positive examples (scalar in [0,1])
+        in the batch.
 
     Raises:
       ValueError: if positive_fraction < 0, or positive_fraction > 1
@@ -53,7 +54,9 @@ class BalancedPositiveNegativeSampler(minibatch_sampler.MinibatchSampler):
 
     Args:
       indicator: boolean tensor of shape [N] whose True entries can be sampled.
-      batch_size: desired batch size.
+      batch_size: desired batch size. If None, keeps all positive samples and
+        randomly selects negative samples so that the positive sample fraction
+        matches self._positive_fraction.
       labels: boolean tensor of shape [N] denoting positive(=True) and negative
           (=False) examples.
 
@@ -83,9 +86,19 @@ class BalancedPositiveNegativeSampler(minibatch_sampler.MinibatchSampler):
     negative_idx = tf.logical_and(negative_idx, indicator)
 
     # Sample positive and negative samples separately
-    max_num_pos = int(self._positive_fraction * batch_size)
+    if batch_size is None:
+      max_num_pos = tf.reduce_sum(tf.to_int32(positive_idx))
+    else:
+      max_num_pos = int(self._positive_fraction * batch_size)
     sampled_pos_idx = self.subsample_indicator(positive_idx, max_num_pos)
-    max_num_neg = batch_size - tf.reduce_sum(tf.cast(sampled_pos_idx, tf.int32))
+    num_sampled_pos = tf.reduce_sum(tf.cast(sampled_pos_idx, tf.int32))
+    if batch_size is None:
+      negative_positive_ratio = (
+          1 - self._positive_fraction) / self._positive_fraction
+      max_num_neg = tf.to_int32(
+          negative_positive_ratio * tf.to_float(num_sampled_pos))
+    else:
+      max_num_neg = batch_size - num_sampled_pos
     sampled_neg_idx = self.subsample_indicator(negative_idx, max_num_neg)
 
     sampled_idx = tf.logical_or(sampled_pos_idx, sampled_neg_idx)

research/object_detection/core/balanced_positive_negative_sampler_test.py

@@ -19,9 +19,10 @@ import numpy as np
 import tensorflow as tf
 
 from object_detection.core import balanced_positive_negative_sampler
+from object_detection.utils import test_case
 
 
-class BalancedPositiveNegativeSamplerTest(tf.test.TestCase):
+class BalancedPositiveNegativeSamplerTest(test_case.TestCase):
 
   def test_subsample_all_examples(self):
     numpy_labels = np.random.permutation(300)
@@ -62,6 +63,28 @@ class BalancedPositiveNegativeSamplerTest(tf.test.TestCase):
       self.assertAllEqual(is_sampled, np.logical_and(is_sampled,
                                                      numpy_indicator))
 
+  def test_subsample_selection_no_batch_size(self):
+    # Test random sampling when only some examples can be sampled:
+    # 1000 samples, 6 positives (5 can be sampled).
+    numpy_labels = np.arange(1000)
+    numpy_indicator = numpy_labels < 999
+    indicator = tf.constant(numpy_indicator)
+    numpy_labels = (numpy_labels - 994) >= 0
+
+    labels = tf.constant(numpy_labels)
+
+    sampler = (balanced_positive_negative_sampler.
+               BalancedPositiveNegativeSampler(0.01))
+    is_sampled = sampler.subsample(indicator, None, labels)
+    with self.test_session() as sess:
+      is_sampled = sess.run(is_sampled)
+      self.assertTrue(sum(is_sampled) == 500)
+      self.assertTrue(sum(np.logical_and(numpy_labels, is_sampled)) == 5)
+      self.assertTrue(sum(np.logical_and(
+          np.logical_not(numpy_labels), is_sampled)) == 495)
+      self.assertAllEqual(is_sampled, np.logical_and(is_sampled,
+                                                     numpy_indicator))
+
   def test_raises_error_with_incorrect_label_shape(self):
     labels = tf.constant([[True, False, False]])
     indicator = tf.constant([True, False, True])

research/object_detection/core/model.py

@@ -237,7 +237,8 @@ class DetectionModel(object):
                           groundtruth_classes_list,
                           groundtruth_masks_list=None,
                           groundtruth_keypoints_list=None,
-                          groundtruth_weights_list=None):
+                          groundtruth_weights_list=None,
+                          groundtruth_is_crowd_list=None):
     """Provide groundtruth tensors.
 
     Args:
@@ -260,6 +261,8 @@ class DetectionModel(object):
         missing keypoints should be encoded as NaN.
       groundtruth_weights_list: A list of 1-D tf.float32 tensors of shape
         [num_boxes] containing weights for groundtruth boxes.
+      groundtruth_is_crowd_list: A list of 1-D tf.bool tensors of shape
+        [num_boxes] containing is_crowd annotations
     """
     self._groundtruth_lists[fields.BoxListFields.boxes] = groundtruth_boxes_list
     self._groundtruth_lists[
@@ -273,6 +276,9 @@ class DetectionModel(object):
     if groundtruth_keypoints_list:
       self._groundtruth_lists[
           fields.BoxListFields.keypoints] = groundtruth_keypoints_list
+    if groundtruth_is_crowd_list:
+      self._groundtruth_lists[
+          fields.BoxListFields.is_crowd] = groundtruth_is_crowd_list
 
   @abstractmethod
   def restore_map(self, fine_tune_checkpoint_type='detection'):

research/object_detection/core/standard_fields.py

@@ -132,6 +132,7 @@ class BoxListFields(object):
     boundaries: boundaries per bounding box.
     keypoints: keypoints per bounding box.
     keypoint_heatmaps: keypoint heatmaps per bounding box.
+    is_crowd: is_crowd annotation per bounding box.
   """
   boxes = 'boxes'
   classes = 'classes'
@@ -142,6 +143,7 @@ class BoxListFields(object):
   boundaries = 'boundaries'
   keypoints = 'keypoints'
   keypoint_heatmaps = 'keypoint_heatmaps'
+  is_crowd = 'is_crowd'
 
 
 class TfExampleFields(object):

research/object_detection/eval.py

@@ -49,6 +49,7 @@ import tensorflow as tf
 
 from object_detection import evaluator
 from object_detection.builders import dataset_builder
+from object_detection.builders import graph_rewriter_builder
 from object_detection.builders import model_builder
 from object_detection.utils import config_util
 from object_detection.utils import dataset_util
@@ -127,8 +128,19 @@ def main(unused_argv):
   if FLAGS.run_once:
     eval_config.max_evals = 1
 
-  evaluator.evaluate(create_input_dict_fn, model_fn, eval_config, categories,
-                     FLAGS.checkpoint_dir, FLAGS.eval_dir)
+  graph_rewriter_fn = None
+  if 'graph_rewriter_config' in configs:
+    graph_rewriter_fn = graph_rewriter_builder.build(
+        configs['graph_rewriter_config'], is_training=False)
+
+  evaluator.evaluate(
+      create_input_dict_fn,
+      model_fn,
+      eval_config,
+      categories,
+      FLAGS.checkpoint_dir,
+      FLAGS.eval_dir,
+      graph_hook_fn=graph_rewriter_fn)
 
 
 if __name__ == '__main__':

research/object_detection/eval_util.py

@@ -588,7 +588,8 @@ def get_eval_metric_ops_for_evaluators(evaluation_metrics,
         'name': (required) string representing category name e.g., 'cat', 'dog'.
     eval_dict: An evaluation dictionary, returned from
       result_dict_for_single_example().
-    include_metrics_per_category: If True, include metrics for each category.
+    include_metrics_per_category: If True, additionally include per-category
+      metrics.
 
   Returns:
     A dictionary of metric names to tuple of value_op and update_op that can be
@@ -615,7 +616,9 @@ def get_eval_metric_ops_for_evaluators(evaluation_metrics,
                   input_data_fields.groundtruth_classes],
               detection_boxes=eval_dict[detection_fields.detection_boxes],
               detection_scores=eval_dict[detection_fields.detection_scores],
-              detection_classes=eval_dict[detection_fields.detection_classes]))
+              detection_classes=eval_dict[detection_fields.detection_classes],
+              groundtruth_is_crowd=eval_dict.get(
+                  input_data_fields.groundtruth_is_crowd)))
     elif metric == 'coco_mask_metrics':
       coco_mask_evaluator = coco_evaluation.CocoMaskEvaluator(
           categories, include_metrics_per_category=include_metrics_per_category)
@@ -629,7 +632,9 @@ def get_eval_metric_ops_for_evaluators(evaluation_metrics,
                   input_data_fields.groundtruth_instance_masks],
               detection_scores=eval_dict[detection_fields.detection_scores],
               detection_classes=eval_dict[detection_fields.detection_classes],
-              detection_masks=eval_dict[detection_fields.detection_masks]))
+              detection_masks=eval_dict[detection_fields.detection_masks],
+              groundtruth_is_crowd=eval_dict.get(
+                  input_data_fields.groundtruth_is_crowd),))
     else:
       raise ValueError('The only evaluation metrics supported are '
                        '"coco_detection_metrics" and "coco_mask_metrics". '

research/object_detection/exporter.py

@@ -197,6 +197,9 @@ def _add_output_tensor_nodes(postprocessed_tensors,
       containing scores for the detected boxes.
     * detection_classes: float32 tensor of shape [batch_size, num_boxes]
       containing class predictions for the detected boxes.
+    * detection_keypoints: (Optional) float32 tensor of shape
+      [batch_size, num_boxes, num_keypoints, 2] containing keypoints for each
+      detection box.
     * detection_masks: (Optional) float32 tensor of shape
       [batch_size, num_boxes, mask_height, mask_width] containing masks for each
       detection box.
@@ -220,6 +223,7 @@ def _add_output_tensor_nodes(postprocessed_tensors,
   scores = postprocessed_tensors.get(detection_fields.detection_scores)
   classes = postprocessed_tensors.get(
       detection_fields.detection_classes) + label_id_offset
+  keypoints = postprocessed_tensors.get(detection_fields.detection_keypoints)
   masks = postprocessed_tensors.get(detection_fields.detection_masks)
   num_detections = postprocessed_tensors.get(detection_fields.num_detections)
   outputs = {}
@@ -231,6 +235,9 @@ def _add_output_tensor_nodes(postprocessed_tensors,
       classes, name=detection_fields.detection_classes)
   outputs[detection_fields.num_detections] = tf.identity(
       num_detections, name=detection_fields.num_detections)
+  if keypoints is not None:
+    outputs[detection_fields.detection_keypoints] = tf.identity(
+        keypoints, name=detection_fields.detection_keypoints)
   if masks is not None:
     outputs[detection_fields.detection_masks] = tf.identity(
         masks, name=detection_fields.detection_masks)

research/object_detection/g3doc/detection_model_zoo.md

@@ -71,6 +71,7 @@ Some remarks on frozen inference graphs:
 | ------------ | :--------------: | :--------------: | :-------------: |
 | [ssd_mobilenet_v1_coco](http://download.tensorflow.org/models/object_detection/ssd_mobilenet_v1_coco_2017_11_17.tar.gz) | 30 | 21 | Boxes |
 | [ssd_mobilenet_v2_coco](http://download.tensorflow.org/models/object_detection/ssd_mobilenet_v2_coco_2018_03_29.tar.gz) | 31 | 22 | Boxes |
+| [ssdlite_mobilenet_v2_coco](http://download.tensorflow.org/models/object_detection/ssdlite_mobilenet_v2_coco_2018_05_09.tar.gz) | 27 | 22 | Boxes |
 | [ssd_inception_v2_coco](http://download.tensorflow.org/models/object_detection/ssd_inception_v2_coco_2017_11_17.tar.gz) | 42 | 24 | Boxes |
 | [faster_rcnn_inception_v2_coco](http://download.tensorflow.org/models/object_detection/faster_rcnn_inception_v2_coco_2018_01_28.tar.gz) | 58 | 28 | Boxes |
 | [faster_rcnn_resnet50_coco](http://download.tensorflow.org/models/object_detection/faster_rcnn_resnet50_coco_2018_01_28.tar.gz) | 89 | 30 | Boxes |

research/object_detection/inputs.py

@@ -71,11 +71,10 @@ def transform_input_data(tensor_dict,
     model_preprocess_fn: model's preprocess function to apply on image tensor.
       This function must take in a 4-D float tensor and return a 4-D preprocess
       float tensor and a tensor containing the true image shape.
-    image_resizer_fn: image resizer function to apply on original image (if
-      `retain_original_image` is True) and groundtruth instance masks. This
-      function must take a 3-D float tensor of an image and a 3-D tensor of
-      instance masks and return a resized version of these along with the true
-      shapes.
+    image_resizer_fn: image resizer function to apply on groundtruth instance
+      `masks. This function must take a 3-D float tensor of an image and a 3-D
+      tensor of instance masks and return a resized version of these along with
+      the true shapes.
     num_classes: number of max classes to one-hot (or k-hot) encode the class
       labels.
     data_augmentation_fn: (optional) data augmentation function to apply on
@@ -90,10 +89,8 @@ def transform_input_data(tensor_dict,
     after applying all the transformations.
   """
   if retain_original_image:
-    original_image_resized, _ = image_resizer_fn(
-        tensor_dict[fields.InputDataFields.image])
     tensor_dict[fields.InputDataFields.original_image] = tf.cast(
-        original_image_resized, tf.uint8)
+        tensor_dict[fields.InputDataFields.image], tf.uint8)
 
   # Apply data augmentation ops.
   if data_augmentation_fn is not None:
@@ -350,7 +347,7 @@ def create_eval_input_fn(eval_config, eval_input_config, model_config):
       TypeError: if the `eval_config`, `eval_input_config` or `model_config`
         are not of the correct type.
     """
-    del params
+    params = params or {}
     if not isinstance(eval_config, eval_pb2.EvalConfig):
       raise TypeError('For eval mode, the `eval_config` must be a '
                       'train_pb2.EvalConfig.')
@@ -375,7 +372,7 @@ def create_eval_input_fn(eval_config, eval_input_config, model_config):
     dataset = INPUT_BUILDER_UTIL_MAP['dataset_build'](
         eval_input_config,
         transform_input_data_fn=transform_data_fn,
-        batch_size=1,
+        batch_size=params.get('batch_size', 1),
         num_classes=config_util.get_number_of_classes(model_config),
         spatial_image_shape=config_util.get_spatial_image_size(
             image_resizer_config))

research/object_detection/inputs_test.py

@@ -482,7 +482,7 @@ class DataTransformationFnTest(tf.test.TestCase):
     self.assertAllEqual(transformed_inputs[
         fields.InputDataFields.original_image].dtype, tf.uint8)
     self.assertAllEqual(transformed_inputs[
-        fields.InputDataFields.original_image].shape, [8, 8, 3])
+        fields.InputDataFields.original_image].shape, [4, 4, 3])
     self.assertAllEqual(transformed_inputs[
         fields.InputDataFields.groundtruth_instance_masks].shape, [2, 8, 8])