def test_construct_single_anchor_unit_dimensions(self): min_level = 5 max_level = 5 anchor_scale = 1.0 aspect_ratios = [1.0] scales_per_octave = 1 im_height = 1 im_width = 1 feature_map_shape_list = [(2, 2)] # Positive offsets are produced. exp_anchor_corners = [[0, 0, 32, 32], [0, 32, 32, 64], [32, 0, 64, 32], [32, 32, 64, 64]] anchor_generator = mg.MultiscaleGridAnchorGenerator( min_level, max_level, anchor_scale, aspect_ratios, scales_per_octave, normalize_coordinates=False) anchors_list = anchor_generator.generate(feature_map_shape_list, im_height=im_height, im_width=im_width) anchor_corners = anchors_list[0].get() with self.test_session(): anchor_corners_out = anchor_corners.eval() self.assertAllClose(anchor_corners_out, exp_anchor_corners)
def test_construct_single_anchor_in_normalized_coordinates(self): min_level = 5 max_level = 5 anchor_scale = 4.0 aspect_ratios = [1.0] scales_per_octave = 1 im_height = 64 im_width = 128 feature_map_shape_list = [(2, 2)] exp_anchor_corners = [[-48. / 64, -48. / 128, 80. / 64, 80. / 128], [-48. / 64, -16. / 128, 80. / 64, 112. / 128], [-16. / 64, -48. / 128, 112. / 64, 80. / 128], [-16. / 64, -16. / 128, 112. / 64, 112. / 128]] anchor_generator = mg.MultiscaleGridAnchorGenerator( min_level, max_level, anchor_scale, aspect_ratios, scales_per_octave, normalize_coordinates=True) anchors_list = anchor_generator.generate(feature_map_shape_list, im_height=im_height, im_width=im_width) anchor_corners = anchors_list[0].get() with self.test_session(): anchor_corners_out = anchor_corners.eval() self.assertAllClose(anchor_corners_out, exp_anchor_corners)
def graph_fn(feature_map1_height, feature_map1_width, feature_map2_height, feature_map2_width): min_level = 5 max_level = 6 anchor_scale = 4.0 aspect_ratios = [1.0] scales_per_octave = 1 im_height = 64 im_width = 64 feature_map_shape_list = [ (feature_map1_height, feature_map1_width), (feature_map2_height, feature_map2_width) ] anchor_generator = mg.MultiscaleGridAnchorGenerator( min_level, max_level, anchor_scale, aspect_ratios, scales_per_octave, normalize_coordinates=False) anchors_list = anchor_generator.generate(feature_map_shape_list, im_height=im_height, im_width=im_width) anchor_corners = [anchors.get() for anchors in anchors_list] return anchor_corners
def test_construct_normalized_anchors_fails_with_unit_dimensions(self): anchor_generator = mg.MultiscaleGridAnchorGenerator( min_level=5, max_level=5, anchor_scale=1.0, aspect_ratios=[1.0], scales_per_octave=1, normalize_coordinates=True) with self.assertRaisesRegexp(ValueError, 'Normalized coordinates'): anchor_generator.generate(feature_map_shape_list=[(2, 2)], im_height=1, im_width=1)
def test_num_anchors_per_location(self): min_level = 5 max_level = 6 anchor_scale = 4.0 aspect_ratios = [1.0, 2.0] scales_per_octave = 3 anchor_generator = mg.MultiscaleGridAnchorGenerator( min_level, max_level, anchor_scale, aspect_ratios, scales_per_octave, normalize_coordinates=False) self.assertEqual(anchor_generator.num_anchors_per_location(), [6, 6])
def test_construct_single_anchor_fails_with_tensor_image_size(self): min_level = 5 max_level = 5 anchor_scale = 4.0 aspect_ratios = [1.0] scales_per_octave = 1 im_height = tf.constant(64) im_width = tf.constant(64) feature_map_shape_list = [(2, 2)] anchor_generator = mg.MultiscaleGridAnchorGenerator( min_level, max_level, anchor_scale, aspect_ratios, scales_per_octave, normalize_coordinates=False) with self.assertRaisesRegexp(ValueError, 'statically defined'): anchor_generator.generate(feature_map_shape_list, im_height=im_height, im_width=im_width)
def graph_fn(): min_level = 5 max_level = 5 anchor_scale = 4.0 aspect_ratios = [1.0] scales_per_octave = 1 im_height = 65 im_width = 65 feature_map_shape_list = [(3, 3)] anchor_generator = mg.MultiscaleGridAnchorGenerator( min_level, max_level, anchor_scale, aspect_ratios, scales_per_octave, normalize_coordinates=False) anchors_list = anchor_generator.generate(feature_map_shape_list, im_height=im_height, im_width=im_width) anchor_corners = anchors_list[0].get() return (anchor_corners, )
def build(anchor_generator_config): """Builds an anchor generator based on the config. Args: anchor_generator_config: An anchor_generator.proto object containing the config for the desired anchor generator. Returns: Anchor generator based on the config. Raises: ValueError: On empty anchor generator proto. """ if not isinstance(anchor_generator_config, anchor_generator_pb2.AnchorGenerator): raise ValueError('anchor_generator_config not of type ' 'anchor_generator_pb2.AnchorGenerator') if anchor_generator_config.WhichOneof( 'anchor_generator_oneof') == 'grid_anchor_generator': grid_anchor_generator_config = anchor_generator_config.grid_anchor_generator return grid_anchor_generator.GridAnchorGenerator( scales=[ float(scale) for scale in grid_anchor_generator_config.scales ], aspect_ratios=[ float(aspect_ratio) for aspect_ratio in grid_anchor_generator_config.aspect_ratios ], base_anchor_size=[ grid_anchor_generator_config.height, grid_anchor_generator_config.width ], anchor_stride=[ grid_anchor_generator_config.height_stride, grid_anchor_generator_config.width_stride ], anchor_offset=[ grid_anchor_generator_config.height_offset, grid_anchor_generator_config.width_offset ]) elif anchor_generator_config.WhichOneof( 'anchor_generator_oneof') == 'ssd_anchor_generator': ssd_anchor_generator_config = anchor_generator_config.ssd_anchor_generator anchor_strides = None if ssd_anchor_generator_config.height_stride: anchor_strides = zip(ssd_anchor_generator_config.height_stride, ssd_anchor_generator_config.width_stride) anchor_offsets = None if ssd_anchor_generator_config.height_offset: anchor_offsets = zip(ssd_anchor_generator_config.height_offset, ssd_anchor_generator_config.width_offset) return multiple_grid_anchor_generator.create_ssd_anchors( num_layers=ssd_anchor_generator_config.num_layers, min_scale=ssd_anchor_generator_config.min_scale, max_scale=ssd_anchor_generator_config.max_scale, scales=[ float(scale) for scale in ssd_anchor_generator_config.scales ], aspect_ratios=ssd_anchor_generator_config.aspect_ratios, interpolated_scale_aspect_ratio=( ssd_anchor_generator_config.interpolated_scale_aspect_ratio), base_anchor_size=[ ssd_anchor_generator_config.base_anchor_height, ssd_anchor_generator_config.base_anchor_width ], anchor_strides=anchor_strides, anchor_offsets=anchor_offsets, reduce_boxes_in_lowest_layer=( ssd_anchor_generator_config.reduce_boxes_in_lowest_layer)) elif anchor_generator_config.WhichOneof( 'anchor_generator_oneof') == 'multiscale_anchor_generator': cfg = anchor_generator_config.multiscale_anchor_generator return multiscale_grid_anchor_generator.MultiscaleGridAnchorGenerator( cfg.min_level, cfg.max_level, cfg.anchor_scale, [float(aspect_ratio) for aspect_ratio in cfg.aspect_ratios], cfg.scales_per_octave, cfg.normalize_coordinates) else: raise ValueError('Empty anchor generator.')