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- # 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.
- # ==============================================================================
-
- """A function to build an object detection box coder from configuration."""
- from object_detection.box_coders import faster_rcnn_box_coder
- from object_detection.box_coders import keypoint_box_coder
- from object_detection.box_coders import mean_stddev_box_coder
- from object_detection.box_coders import square_box_coder
- from object_detection.protos import box_coder_pb2
-
-
- def build(box_coder_config):
- """Builds a box coder object based on the box coder config.
-
- Args:
- box_coder_config: A box_coder.proto object containing the config for the
- desired box coder.
-
- Returns:
- BoxCoder based on the config.
-
- Raises:
- ValueError: On empty box coder proto.
- """
- if not isinstance(box_coder_config, box_coder_pb2.BoxCoder):
- raise ValueError('box_coder_config not of type box_coder_pb2.BoxCoder.')
-
- if box_coder_config.WhichOneof('box_coder_oneof') == 'faster_rcnn_box_coder':
- return faster_rcnn_box_coder.FasterRcnnBoxCoder(scale_factors=[
- box_coder_config.faster_rcnn_box_coder.y_scale,
- box_coder_config.faster_rcnn_box_coder.x_scale,
- box_coder_config.faster_rcnn_box_coder.height_scale,
- box_coder_config.faster_rcnn_box_coder.width_scale
- ])
- if box_coder_config.WhichOneof('box_coder_oneof') == 'keypoint_box_coder':
- return keypoint_box_coder.KeypointBoxCoder(
- box_coder_config.keypoint_box_coder.num_keypoints,
- scale_factors=[
- box_coder_config.keypoint_box_coder.y_scale,
- box_coder_config.keypoint_box_coder.x_scale,
- box_coder_config.keypoint_box_coder.height_scale,
- box_coder_config.keypoint_box_coder.width_scale
- ])
- if (box_coder_config.WhichOneof('box_coder_oneof') ==
- 'mean_stddev_box_coder'):
- 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,
- box_coder_config.square_box_coder.x_scale,
- box_coder_config.square_box_coder.length_scale
- ])
- raise ValueError('Empty box coder.')
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