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# Copyright 2015 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 draw_bounding_box_op."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import numpy as np
from tensorflow.python.framework import dtypes
from tensorflow.python.framework import ops
from tensorflow.python.ops import array_ops
from tensorflow.python.ops import image_ops
from tensorflow.python.ops import image_ops_impl
from tensorflow.python.ops import math_ops
from tensorflow.python.platform import test
class DrawBoundingBoxOpTest(test.TestCase):
def _fillBorder(self, image, color):
"""Fill the border of the image.
Args:
image: Numpy array of shape [height, width, depth].
color: Numpy color of shape [depth] and either contents RGB/RGBA.
Returns:
image of original shape with border filled with "color".
Raises:
ValueError: Depths of image and color don"t match.
"""
height, width, depth = image.shape
if depth != color.shape[0]:
raise ValueError("Image (%d) and color (%d) depths must match." %
(depth, color.shape[0]))
image[0:height, 0, 0:depth] = color
image[0:height, width - 1, 0:depth] = color
image[0, 0:width, 0:depth] = color
image[height - 1, 0:width, 0:depth] = color
return image
def _testDrawBoundingBoxColorCycling(self, img):
"""Tests if cycling works appropriately.
Args:
img: 3-D numpy image on which to draw.
"""
# THIS TABLE MUST MATCH draw_bounding_box_op.cc
color_table = np.asarray([[1, 1, 0, 1], [0, 0, 1, 1], [1, 0, 0, 1],
[0, 1, 0, 1], [0.5, 0, 0.5, 1], [0.5, 0.5, 0, 1],
[0.5, 0, 0, 1], [0, 0, 0.5, 1], [0, 1, 1, 1],
[1, 0, 1, 1]])
assert len(img.shape) == 3
depth = img.shape[2]
assert depth <= color_table.shape[1]
assert depth == 1 or depth == 3 or depth == 4
## Set red channel to 1 if image is GRY.
if depth == 1:
color_table[:, 0] = 1
num_colors = color_table.shape[0]
for num_boxes in range(1, num_colors + 2):
# Generate draw_bounding_box_op drawn image
image = np.copy(img)
color = color_table[(num_boxes - 1) % num_colors, 0:depth]
test_drawn_image = self._fillBorder(image, color)
bboxes = np.asarray([0, 0, 1, 1])
bboxes = np.vstack([bboxes for _ in range(num_boxes)])
bboxes = math_ops.to_float(bboxes)
bboxes = array_ops.expand_dims(bboxes, 0)
image = ops.convert_to_tensor(image)
image = image_ops_impl.convert_image_dtype(image, dtypes.float32)
image = array_ops.expand_dims(image, 0)
image = image_ops.draw_bounding_boxes(image, bboxes)
with self.test_session(use_gpu=False) as sess:
op_drawn_image = np.squeeze(sess.run(image), 0)
self.assertAllEqual(test_drawn_image, op_drawn_image)
def testDrawBoundingBoxRGBColorCycling(self):
"""Test if RGB color cycling works correctly."""
image = np.zeros([10, 10, 3], "float32")
self._testDrawBoundingBoxColorCycling(image)
def testDrawBoundingBoxRGBAColorCycling(self):
"""Test if RGBA color cycling works correctly."""
image = np.zeros([10, 10, 4], "float32")
self._testDrawBoundingBoxColorCycling(image)
def testDrawBoundingBoxGRY(self):
"""Test if drawing bounding box on a GRY image works."""
image = np.zeros([4, 4, 1], "float32")
self._testDrawBoundingBoxColorCycling(image)
if __name__ == "__main__":
test.main()
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