def testDecodeExampleWithTensor(self): tensor_shape = (2, 3, 1) np_array = np.random.rand(2, 3, 1) example = tf.train.Example( features=tf.train.Features(feature={ 'image/depth_map': self._EncodedFloatFeature(np_array), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'image/depth_map': parsing_ops.FixedLenFeature( tensor_shape, tf.float32, default_value=array_ops.zeros(tensor_shape)) } items_to_handlers = {'depth': tfexample_decoder.Tensor('image/depth_map')} decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_depth] = decoder.decode(serialized_example, ['depth']) depth = tf_depth.eval() self.assertAllClose(np_array, depth)
def testDecodeExampleWithSparseTensorWithGivenShape(self): np_indices = np.array([[1], [2], [5]]) np_values = np.array([0.1, 0.2, 0.6]).astype('f') np_shape = np.array([6]) example = example_pb2.Example( features=feature_pb2.Features( feature={ 'indices': self._EncodedInt64Feature(np_indices), 'values': self._EncodedFloatFeature(np_values), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'indices': parsing_ops.VarLenFeature(dtype=dtypes.int64), 'values': parsing_ops.VarLenFeature(dtype=dtypes.float32), } items_to_handlers = { 'labels': tfexample_decoder.SparseTensor(shape=np_shape), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_labels] = decoder.decode(serialized_example, ['labels']) labels = tf_labels.eval() self.assertAllEqual(labels.indices, np_indices) self.assertAllEqual(labels.values, np_values) self.assertAllEqual(labels.dense_shape, np_shape)
def testDecodeExampleWithSparseTensorToDense(self): np_indices = np.array([1, 2, 5]) np_values = np.array([0.1, 0.2, 0.6]).astype('f') np_shape = np.array([6]) np_dense = np.array([0.0, 0.1, 0.2, 0.0, 0.0, 0.6]).astype('f') example = tf.train.Example( features=tf.train.Features( feature={ 'indices': self._EncodedInt64Feature(np_indices), 'values': self._EncodedFloatFeature(np_values), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'indices': parsing_ops.VarLenFeature(dtype=tf.int64), 'values': parsing_ops.VarLenFeature(dtype=tf.float32), } items_to_handlers = { 'labels': tfexample_decoder.SparseTensor(shape=np_shape, densify=True), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_labels] = decoder.decode(serialized_example, ['labels']) labels = tf_labels.eval() self.assertAllClose(labels, np_dense)
def testDecodeExampleWithLookup(self): example = tf.train.Example( features=tf.train.Features( feature={ 'image/object/class/text': self._BytesFeature(np.array(['cat', 'dog', 'guinea pig'])), })) serialized_example = example.SerializeToString() # 'dog' -> 0, 'guinea pig' -> 1, 'cat' -> 2 table = lookup_ops.index_table_from_tensor( tf.constant(['dog', 'guinea pig', 'cat'])) with self.cached_session() as sess: sess.run(lookup_ops.tables_initializer()) serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'image/object/class/text': parsing_ops.VarLenFeature(tf.string), } items_to_handlers = { 'labels': tfexample_decoder.LookupTensor('image/object/class/text', table), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) obtained_class_ids = decoder.decode(serialized_example)[0].eval() self.assertAllClose([2, 0, 1], obtained_class_ids)
def testDecodeExampleWithStringTensor(self): tensor_shape = (2, 3, 1) np_array = np.array([[['ab'], ['cd'], ['ef']], [['ghi'], ['jkl'], ['mnop']]]) example = tf.train.Example( features=tf.train.Features(feature={ 'labels': self._BytesFeature(np_array), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'labels': parsing_ops.FixedLenFeature( tensor_shape, tf.string, default_value=tf.constant( '', shape=tensor_shape, dtype=tf.string)) } items_to_handlers = { 'labels': tfexample_decoder.Tensor('labels'), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_labels] = decoder.decode(serialized_example, ['labels']) labels = tf_labels.eval() labels = labels.astype(np_array.dtype) self.assertTrue(np.array_equal(np_array, labels))
def _create_tfrecord_dataset(tmpdir): if not gfile.Exists(tmpdir): gfile.MakeDirs(tmpdir) data_sources = test_utils.create_tfrecord_files(tmpdir, num_files=1) keys_to_features = { 'image/encoded': parsing_ops.FixedLenFeature( shape=(), dtype=dtypes.string, default_value=''), 'image/format': parsing_ops.FixedLenFeature( shape=(), dtype=dtypes.string, default_value='jpeg'), 'image/class/label': parsing_ops.FixedLenFeature( shape=[1], dtype=dtypes.int64, default_value=array_ops.zeros( [1], dtype=dtypes.int64)) } items_to_handlers = { 'image': tfexample_decoder.Image(), 'label': tfexample_decoder.Tensor('image/class/label'), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) return dataset.Dataset( data_sources=data_sources, reader=io_ops.TFRecordReader, decoder=decoder, num_samples=100, items_to_descriptions=None)
def testDecodeImageWithItemHandlerCallback(self): image_shape = (2, 3, 3) for image_encoding in ['jpeg', 'png']: image, serialized_example = self.GenerateImage( image_format=image_encoding, image_shape=image_shape) with self.cached_session(): def ConditionalDecoding(keys_to_tensors): """See base class.""" image_buffer = keys_to_tensors['image/encoded'] image_format = keys_to_tensors['image/format'] def DecodePng(): return image_ops.decode_png(image_buffer, 3) def DecodeJpg(): return image_ops.decode_jpeg(image_buffer, 3) image = control_flow_ops.case( { math_ops.equal(image_format, 'png'): DecodePng, }, default=DecodeJpg, exclusive=True) image = array_ops.reshape(image, image_shape) return image keys_to_features = { 'image/encoded': parsing_ops.FixedLenFeature( (), dtypes.string, default_value=''), 'image/format': parsing_ops.FixedLenFeature( (), dtypes.string, default_value='jpeg') } items_to_handlers = { 'image': tfexample_decoder.ItemHandlerCallback( ['image/encoded', 'image/format'], ConditionalDecoding) } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_image] = decoder.decode(serialized_example, ['image']) decoded_image = tf_image.eval() if image_encoding == 'jpeg': # For jenkins: image = image.astype(np.float32) decoded_image = decoded_image.astype(np.float32) self.assertAllClose(image, decoded_image, rtol=.5, atol=1.001) else: self.assertAllClose(image, decoded_image, atol=0)
def testDecodeExampleWithBoundingBoxDense(self): num_bboxes = 10 np_ymin = np.random.rand(num_bboxes, 1) np_xmin = np.random.rand(num_bboxes, 1) np_ymax = np.random.rand(num_bboxes, 1) np_xmax = np.random.rand(num_bboxes, 1) np_bboxes = np.hstack([np_ymin, np_xmin, np_ymax, np_xmax]) example = tf.train.Example( features=tf.train.Features( feature={ 'image/object/bbox/ymin': self._EncodedFloatFeature(np_ymin), 'image/object/bbox/xmin': self._EncodedFloatFeature(np_xmin), 'image/object/bbox/ymax': self._EncodedFloatFeature(np_ymax), 'image/object/bbox/xmax': self._EncodedFloatFeature(np_xmax), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'image/object/bbox/ymin': parsing_ops.FixedLenSequenceFeature([], tf.float32, allow_missing=True), 'image/object/bbox/xmin': parsing_ops.FixedLenSequenceFeature([], tf.float32, allow_missing=True), 'image/object/bbox/ymax': parsing_ops.FixedLenSequenceFeature([], tf.float32, allow_missing=True), 'image/object/bbox/xmax': parsing_ops.FixedLenSequenceFeature([], tf.float32, allow_missing=True), } items_to_handlers = { 'object/bbox': tfexample_decoder.BoundingBox(['ymin', 'xmin', 'ymax', 'xmax'], 'image/object/bbox/'), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_bboxes] = decoder.decode(serialized_example, ['object/bbox']) bboxes = tf_bboxes.eval() self.assertAllClose(np_bboxes, bboxes)
def testDecodeExampleWithBackupHandlerLookup(self): example1 = tf.train.Example( features=tf.train.Features( feature={ 'image/object/class/text': self._BytesFeature(np.array(['cat', 'dog', 'guinea pig'])), 'image/object/class/label': self._EncodedInt64Feature(np.array([42, 10, 900])) })) example2 = tf.train.Example( features=tf.train.Features( feature={ 'image/object/class/text': self._BytesFeature(np.array(['cat', 'dog', 'guinea pig'])), })) example3 = tf.train.Example( features=tf.train.Features( feature={ 'image/object/class/label': self._EncodedInt64Feature(np.array([42, 10, 901])) })) # 'dog' -> 0, 'guinea pig' -> 1, 'cat' -> 2 table = lookup_ops.index_table_from_tensor( tf.constant(['dog', 'guinea pig', 'cat'])) keys_to_features = { 'image/object/class/text': parsing_ops.VarLenFeature(tf.string), 'image/object/class/label': parsing_ops.VarLenFeature(tf.int64), } backup_handler = tfexample_decoder.BackupHandler( handler=tfexample_decoder.Tensor('image/object/class/label'), backup=tfexample_decoder.LookupTensor('image/object/class/text', table)) items_to_handlers = { 'labels': backup_handler, } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) obtained_class_ids_each_example = [] with self.cached_session() as sess: sess.run(lookup_ops.tables_initializer()) for example in [example1, example2, example3]: serialized_example = array_ops.reshape( example.SerializeToString(), shape=[]) obtained_class_ids_each_example.append( decoder.decode(serialized_example)[0].eval()) self.assertAllClose([42, 10, 900], obtained_class_ids_each_example[0]) self.assertAllClose([2, 0, 1], obtained_class_ids_each_example[1]) self.assertAllClose([42, 10, 901], obtained_class_ids_each_example[2])
def testDecodeExampleMultiShapeKeyTensor(self): np_image = np.random.rand(2, 3, 1).astype('f') np_labels = np.array([[[1], [2], [3]], [[4], [5], [6]]]) height, width, depth = np_labels.shape example = tf.train.Example( features=tf.train.Features( feature={ 'image': self._EncodedFloatFeature(np_image), 'image/shape': self._EncodedInt64Feature(np.array(np_image.shape)), 'labels': self._EncodedInt64Feature(np_labels), 'labels/height': self._EncodedInt64Feature(np.array([height])), 'labels/width': self._EncodedInt64Feature(np.array([width])), 'labels/depth': self._EncodedInt64Feature(np.array([depth])), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'image': parsing_ops.VarLenFeature(dtype=tf.float32), 'image/shape': parsing_ops.VarLenFeature(dtype=tf.int64), 'labels': parsing_ops.VarLenFeature(dtype=tf.int64), 'labels/height': parsing_ops.VarLenFeature(dtype=tf.int64), 'labels/width': parsing_ops.VarLenFeature(dtype=tf.int64), 'labels/depth': parsing_ops.VarLenFeature(dtype=tf.int64), } items_to_handlers = { 'image': tfexample_decoder.Tensor('image', shape_keys='image/shape'), 'labels': tfexample_decoder.Tensor( 'labels', shape_keys=['labels/height', 'labels/width', 'labels/depth']), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_image, tf_labels] = decoder.decode(serialized_example, ['image', 'labels']) self.assertAllEqual(tf_image.eval(), np_image) self.assertAllEqual(tf_labels.eval(), np_labels)
def testDecodeExampleWithRepeatedImages(self): image_shape = (2, 3, 3) image_format = 'png' image, _ = self.GenerateImage( image_format=image_format, image_shape=image_shape) tf_encoded = self._Encoder(image, image_format) with self.cached_session(): tf_string = tf_encoded.eval() example = tf.train.Example( features=tf.train.Features( feature={ 'image/encoded': tf.train.Feature( bytes_list=tf.train.BytesList( value=[tf_string, tf_string])), 'image/format': self._StringFeature(image_format), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) decoder = tfexample_decoder.TFExampleDecoder( keys_to_features={ 'image/encoded': parsing_ops.FixedLenFeature((2,), tf.string), 'image/format': parsing_ops.FixedLenFeature((), tf.string, default_value=image_format), }, items_to_handlers={'image': tfexample_decoder.Image(repeated=True)}) [tf_image] = decoder.decode(serialized_example, ['image']) output_image = tf_image.eval() self.assertEqual(output_image.shape, (2, 2, 3, 3)) self.assertAllEqual(np.squeeze(output_image[0, :, :, :]), image) self.assertAllEqual(np.squeeze(output_image[1, :, :, :]), image)
def testDecodeExampleWithItemHandlerCallback(self): np.random.seed(0) tensor_shape = (2, 3, 1) np_array = np.random.rand(2, 3, 1) example = example_pb2.Example( features=feature_pb2.Features(feature={ 'image/depth_map': self._EncodedFloatFeature(np_array), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'image/depth_map': parsing_ops.FixedLenFeature( tensor_shape, dtypes.float32, default_value=array_ops.zeros(tensor_shape)) } def HandleDepth(keys_to_tensors): depth = list(keys_to_tensors.values())[0] depth += 1 return depth items_to_handlers = { 'depth': tfexample_decoder.ItemHandlerCallback('image/depth_map', HandleDepth) } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_depth] = decoder.decode(serialized_example, ['depth']) depth = tf_depth.eval() self.assertAllClose(np_array, depth - 1)
def testDecodeExampleWithInt64Tensor(self): np_array = np.random.randint(1, 10, size=(2, 3, 1)) example = tf.train.Example( features=tf.train.Features(feature={ 'array': self._EncodedInt64Feature(np_array), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'array': parsing_ops.FixedLenFeature(np_array.shape, tf.int64) } items_to_handlers = { 'array': tfexample_decoder.Tensor('array'), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_array] = decoder.decode(serialized_example, ['array']) self.assertAllEqual(tf_array.eval(), np_array)
def testDecodeExampleWithVarLenTensorToDense(self): np_array = np.array([[1, 2, 3], [4, 5, 6]]) example = tf.train.Example( features=tf.train.Features(feature={ 'labels': self._EncodedInt64Feature(np_array), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'labels': parsing_ops.VarLenFeature(dtype=tf.int64), } items_to_handlers = { 'labels': tfexample_decoder.Tensor('labels', shape=np_array.shape), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_labels] = decoder.decode(serialized_example, ['labels']) labels = tf_labels.eval() self.assertAllEqual(labels, np_array)
def testDecodeExampleWithFloatTensor(self): np_array = np.random.rand(2, 3, 1).astype('f') example = example_pb2.Example( features=feature_pb2.Features(feature={ 'array': self._EncodedFloatFeature(np_array), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'array': parsing_ops.FixedLenFeature(np_array.shape, dtypes.float32) } items_to_handlers = { 'array': tfexample_decoder.Tensor('array'), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_array] = decoder.decode(serialized_example, ['array']) self.assertAllEqual(tf_array.eval(), np_array)
def testDecodeExampleWithVarLenTensor(self): np_array = np.array([[[1], [2], [3]], [[4], [5], [6]]]) example = example_pb2.Example( features=feature_pb2.Features(feature={ 'labels': self._EncodedInt64Feature(np_array), })) serialized_example = example.SerializeToString() with self.cached_session(): serialized_example = array_ops.reshape(serialized_example, shape=[]) keys_to_features = { 'labels': parsing_ops.VarLenFeature(dtype=dtypes.int64), } items_to_handlers = { 'labels': tfexample_decoder.Tensor('labels'), } decoder = tfexample_decoder.TFExampleDecoder(keys_to_features, items_to_handlers) [tf_labels] = decoder.decode(serialized_example, ['labels']) labels = tf_labels.eval() self.assertAllEqual(labels, np_array.flatten())
def DecodeExample(self, serialized_example, item_handler, image_format): """Decodes the given serialized example with the specified item handler. Args: serialized_example: a serialized TF example string. item_handler: the item handler used to decode the image. image_format: the image format being decoded. Returns: the decoded image found in the serialized Example. """ serialized_example = array_ops.reshape(serialized_example, shape=[]) decoder = tfexample_decoder.TFExampleDecoder( keys_to_features={ 'image/encoded': parsing_ops.FixedLenFeature((), tf.string, default_value=''), 'image/format': parsing_ops.FixedLenFeature((), tf.string, default_value=image_format), }, items_to_handlers={'image': item_handler}) [tf_image] = decoder.decode(serialized_example, ['image']) return tf_image