// This file is part of OpenCV project. // It is subject to the license terms in the LICENSE file found in the top-level directory // of this distribution and at http://opencv.org/license.html #include "test_precomp.hpp" namespace opencv_test { namespace { #ifdef HAVE_PNG TEST(Imgcodecs_Png, write_big) { const string root = cvtest::TS::ptr()->get_data_path(); const string filename = root + "readwrite/read.png"; const string dst_file = cv::tempfile(".png"); Mat img; ASSERT_NO_THROW(img = imread(filename)); ASSERT_FALSE(img.empty()); EXPECT_EQ(13043, img.cols); EXPECT_EQ(13917, img.rows); ASSERT_NO_THROW(imwrite(dst_file, img)); EXPECT_EQ(0, remove(dst_file.c_str())); } TEST(Imgcodecs_Png, encode) { vector buff; Mat img_gt = Mat::zeros(1000, 1000, CV_8U); vector param; param.push_back(IMWRITE_PNG_COMPRESSION); param.push_back(3); //default(3) 0-9. EXPECT_NO_THROW(imencode(".png", img_gt, buff, param)); Mat img; EXPECT_NO_THROW(img = imdecode(buff, IMREAD_ANYDEPTH)); // hang EXPECT_FALSE(img.empty()); EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), img, img_gt); } TEST(Imgcodecs_Png, regression_ImreadVSCvtColor) { const string root = cvtest::TS::ptr()->get_data_path(); const string imgName = root + "../cv/shared/lena.png"; Mat original_image = imread(imgName); Mat gray_by_codec = imread(imgName, IMREAD_GRAYSCALE); Mat gray_by_cvt; cvtColor(original_image, gray_by_cvt, COLOR_BGR2GRAY); Mat diff; absdiff(gray_by_codec, gray_by_cvt, diff); EXPECT_LT(cvtest::mean(diff)[0], 1.); EXPECT_PRED_FORMAT2(cvtest::MatComparator(10, 0), gray_by_codec, gray_by_cvt); } // Test OpenCV issue 3075 is solved TEST(Imgcodecs_Png, read_color_palette_with_alpha) { const string root = cvtest::TS::ptr()->get_data_path(); Mat img; // First Test : Read PNG with alpha, imread flag -1 img = imread(root + "readwrite/color_palette_alpha.png", IMREAD_UNCHANGED); ASSERT_FALSE(img.empty()); ASSERT_TRUE(img.channels() == 4); // pixel is red in BGRA EXPECT_EQ(img.at(0, 0), Vec4b(0, 0, 255, 255)); EXPECT_EQ(img.at(0, 1), Vec4b(0, 0, 255, 255)); // Second Test : Read PNG without alpha, imread flag -1 img = imread(root + "readwrite/color_palette_no_alpha.png", IMREAD_UNCHANGED); ASSERT_FALSE(img.empty()); ASSERT_TRUE(img.channels() == 3); // pixel is red in BGR EXPECT_EQ(img.at(0, 0), Vec3b(0, 0, 255)); EXPECT_EQ(img.at(0, 1), Vec3b(0, 0, 255)); // Third Test : Read PNG with alpha, imread flag 1 img = imread(root + "readwrite/color_palette_alpha.png", IMREAD_COLOR); ASSERT_FALSE(img.empty()); ASSERT_TRUE(img.channels() == 3); // pixel is red in BGR EXPECT_EQ(img.at(0, 0), Vec3b(0, 0, 255)); EXPECT_EQ(img.at(0, 1), Vec3b(0, 0, 255)); // Fourth Test : Read PNG without alpha, imread flag 1 img = imread(root + "readwrite/color_palette_no_alpha.png", IMREAD_COLOR); ASSERT_FALSE(img.empty()); ASSERT_TRUE(img.channels() == 3); // pixel is red in BGR EXPECT_EQ(img.at(0, 0), Vec3b(0, 0, 255)); EXPECT_EQ(img.at(0, 1), Vec3b(0, 0, 255)); } /** * Test for check whether reading exif orientation tag was processed successfully or not * The test info is the set of 8 images named testExifRotate_{1 to 8}.png * The test image is the square 10x10 points divided by four sub-squares: * (R corresponds to Red, G to Green, B to Blue, W to white) * --------- --------- * | R | G | | G | R | * |-------| - (tag 1) |-------| - (tag 2) * | B | W | | W | B | * --------- --------- * * --------- --------- * | W | B | | B | W | * |-------| - (tag 3) |-------| - (tag 4) * | G | R | | R | G | * --------- --------- * * --------- --------- * | R | B | | G | W | * |-------| - (tag 5) |-------| - (tag 6) * | G | W | | R | B | * --------- --------- * * --------- --------- * | W | G | | B | R | * |-------| - (tag 7) |-------| - (tag 8) * | B | R | | W | G | * --------- --------- * * * Every image contains exif field with orientation tag (0x112) * After reading each image and applying the orientation tag, * the resulting image should be: * --------- * | R | G | * |-------| * | B | W | * --------- * */ typedef testing::TestWithParam Imgcodecs_PNG_Exif; // Solution to issue 16579: PNG read doesn't support Exif orientation data #ifdef OPENCV_IMGCODECS_PNG_WITH_EXIF TEST_P(Imgcodecs_PNG_Exif, exif_orientation) #else TEST_P(Imgcodecs_PNG_Exif, DISABLED_exif_orientation) #endif { const string root = cvtest::TS::ptr()->get_data_path(); const string filename = root + GetParam(); const int colorThresholdHigh = 250; const int colorThresholdLow = 5; Mat m_img = imread(filename); ASSERT_FALSE(m_img.empty()); Vec3b vec; //Checking the first quadrant (with supposed red) vec = m_img.at(2, 2); //some point inside the square EXPECT_LE(vec.val[0], colorThresholdLow); EXPECT_LE(vec.val[1], colorThresholdLow); EXPECT_GE(vec.val[2], colorThresholdHigh); //Checking the second quadrant (with supposed green) vec = m_img.at(2, 7); //some point inside the square EXPECT_LE(vec.val[0], colorThresholdLow); EXPECT_GE(vec.val[1], colorThresholdHigh); EXPECT_LE(vec.val[2], colorThresholdLow); //Checking the third quadrant (with supposed blue) vec = m_img.at(7, 2); //some point inside the square EXPECT_GE(vec.val[0], colorThresholdHigh); EXPECT_LE(vec.val[1], colorThresholdLow); EXPECT_LE(vec.val[2], colorThresholdLow); } const string exif_files[] = { "readwrite/testExifOrientation_1.png", "readwrite/testExifOrientation_2.png", "readwrite/testExifOrientation_3.png", "readwrite/testExifOrientation_4.png", "readwrite/testExifOrientation_5.png", "readwrite/testExifOrientation_6.png", "readwrite/testExifOrientation_7.png", "readwrite/testExifOrientation_8.png" }; INSTANTIATE_TEST_CASE_P(ExifFiles, Imgcodecs_PNG_Exif, testing::ValuesIn(exif_files)); #endif // HAVE_PNG }} // namespace