Internal Changes.

PiperOrigin-RevId: 289172941

official/vision/image_classification/imagenet_preprocessing.py

@@ -143,7 +143,7 @@ def get_filenames(is_training, data_dir):
         for i in range(128)]
 
 
-def _parse_example_proto(example_serialized):
+def parse_example_proto(example_serialized):
   """Parses an Example proto containing a training example of an image.
 
   The output of the build_image_data.py image preprocessing script is a dataset
@@ -228,7 +228,7 @@ def parse_record(raw_record, is_training, dtype):
   Returns:
     Tuple with processed image tensor and one-hot-encoded label tensor.
   """
-  image_buffer, label, bbox = _parse_example_proto(raw_record)
+  image_buffer, label, bbox = parse_example_proto(raw_record)
 
   image = preprocess_image(
       image_buffer=image_buffer,
@@ -256,7 +256,8 @@ def input_fn(is_training,
              input_context=None,
              drop_remainder=False,
              tf_data_experimental_slack=False,
-             training_dataset_cache=False):
+             training_dataset_cache=False,
+             filenames=None):
   """Input function which provides batches for train or eval.
 
   Args:
@@ -276,10 +277,12 @@ def input_fn(is_training,
     training_dataset_cache: Whether to cache the training dataset on workers.
        Typically used to improve training performance when training data is in
        remote storage and can fit into worker memory.
+    filenames: Optional field for providing the file names of the TFRecords.
 
   Returns:
     A dataset that can be used for iteration.
   """
+  if filenames is None:
     filenames = get_filenames(is_training, data_dir)
   dataset = tf.data.Dataset.from_tensor_slices(filenames)