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Add a test to check whether cv::imread successfully reads 16-bit APNG images.

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Make proper fixes to pass the test
This commit is contained in:
Suleyman TURKMEN
2025-03-18 01:46:52 +03:00
parent 855f20fdfe
commit 0ed5556cee
3 changed files with 69 additions and 3 deletions
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modules/imgcodecs/test/test_animation.cpp
+58 -1
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@@ -626,7 +626,7 @@ TEST(Imgcodecs_APNG, imencode_animation)
EXPECT_TRUE(imencodeanimation(".png", gt_animation, buf));
EXPECT_TRUE(imdecodeanimation(buf, mem_animation));
EXPECT_EQ(mem_animation.frames.size(), gt_animation.frames.size());
EXPECT_EQ(mem_animation.frames.size(), gt_animation.frames.size());
EXPECT_EQ(mem_animation.bgcolor, gt_animation.bgcolor);
EXPECT_EQ(mem_animation.loop_count, gt_animation.loop_count);
for (size_t i = 0; i < gt_animation.frames.size(); i++)
@@ -638,4 +638,61 @@ TEST(Imgcodecs_APNG, imencode_animation)
#endif // HAVE_PNG
#if defined(HAVE_PNG) || defined(HAVE_SPNG)
TEST(Imgcodecs_APNG, imread_animation_16u)
{
// Set the path to the test image directory and filename for loading.
const string root = cvtest::TS::ptr()->get_data_path();
const string filename = root + "readwrite/033.png";
Mat img = imread(filename, IMREAD_UNCHANGED);
ASSERT_FALSE(img.empty());
EXPECT_TRUE(img.type() == CV_16UC4);
EXPECT_EQ(0, img.at<ushort>(0, 0));
EXPECT_EQ(0, img.at<ushort>(0, 1));
EXPECT_EQ(65280, img.at<ushort>(0, 2));
EXPECT_EQ(65535, img.at<ushort>(0, 3));
img = imread(filename, IMREAD_GRAYSCALE);
ASSERT_FALSE(img.empty());
EXPECT_TRUE(img.type() == CV_8UC1);
EXPECT_EQ(76, img.at<uchar>(0, 0));
img = imread(filename, IMREAD_COLOR);
ASSERT_FALSE(img.empty());
EXPECT_TRUE(img.type() == CV_8UC3);
EXPECT_EQ(0, img.at<uchar>(0, 0));
EXPECT_EQ(0, img.at<uchar>(0, 1));
EXPECT_EQ(255, img.at<uchar>(0, 2));
img = imread(filename, IMREAD_COLOR_RGB);
ASSERT_FALSE(img.empty());
EXPECT_TRUE(img.type() == CV_8UC3);
EXPECT_EQ(255, img.at<uchar>(0, 0));
EXPECT_EQ(0, img.at<uchar>(0, 1));
EXPECT_EQ(0, img.at<uchar>(0, 2));
img = imread(filename, IMREAD_ANYDEPTH);
ASSERT_FALSE(img.empty());
EXPECT_TRUE(img.type() == CV_16UC1);
EXPECT_EQ(19519, img.at<ushort>(0, 0));
img = imread(filename, IMREAD_COLOR | IMREAD_ANYDEPTH);
ASSERT_FALSE(img.empty());
EXPECT_TRUE(img.type() == CV_16UC3);
EXPECT_EQ(0, img.at<ushort>(0, 0));
EXPECT_EQ(0, img.at<ushort>(0, 1));
EXPECT_EQ(65280, img.at<ushort>(0, 2));
img = imread(filename, IMREAD_COLOR_RGB | IMREAD_ANYDEPTH);
ASSERT_FALSE(img.empty());
EXPECT_TRUE(img.type() == CV_16UC3);
EXPECT_EQ(65280, img.at<ushort>(0, 0));
EXPECT_EQ(0, img.at<ushort>(0, 1));
EXPECT_EQ(0, img.at<ushort>(0, 2));
}
#endif // HAVE_PNG || HAVE_SPNG
}} // namespace