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Open Source Computer Vision Library
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98 lines
3.2 KiB
98 lines
3.2 KiB
// This file is part of OpenCV project. |
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// It is subject to the license terms in the LICENSE file found in the top-level directory |
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// of this distribution and at http://opencv.org/license.html |
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#include "test_precomp.hpp" |
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namespace opencv_test { namespace { |
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#ifdef HAVE_PNG |
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TEST(Imgcodecs_Png, write_big) |
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{ |
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const string root = cvtest::TS::ptr()->get_data_path(); |
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const string filename = root + "readwrite/read.png"; |
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const string dst_file = cv::tempfile(".png"); |
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Mat img; |
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ASSERT_NO_THROW(img = imread(filename)); |
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ASSERT_FALSE(img.empty()); |
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EXPECT_EQ(13043, img.cols); |
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EXPECT_EQ(13917, img.rows); |
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ASSERT_NO_THROW(imwrite(dst_file, img)); |
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EXPECT_EQ(0, remove(dst_file.c_str())); |
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} |
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TEST(Imgcodecs_Png, encode) |
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{ |
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vector<uchar> buff; |
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Mat img_gt = Mat::zeros(1000, 1000, CV_8U); |
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vector<int> param; |
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param.push_back(IMWRITE_PNG_COMPRESSION); |
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param.push_back(3); //default(3) 0-9. |
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EXPECT_NO_THROW(imencode(".png", img_gt, buff, param)); |
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Mat img; |
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EXPECT_NO_THROW(img = imdecode(buff, IMREAD_ANYDEPTH)); // hang |
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EXPECT_FALSE(img.empty()); |
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), img, img_gt); |
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} |
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TEST(Imgcodecs_Png, regression_ImreadVSCvtColor) |
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{ |
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const string root = cvtest::TS::ptr()->get_data_path(); |
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const string imgName = root + "../cv/shared/lena.png"; |
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Mat original_image = imread(imgName); |
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Mat gray_by_codec = imread(imgName, IMREAD_GRAYSCALE); |
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Mat gray_by_cvt; |
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cvtColor(original_image, gray_by_cvt, COLOR_BGR2GRAY); |
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Mat diff; |
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absdiff(gray_by_codec, gray_by_cvt, diff); |
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EXPECT_LT(cvtest::mean(diff)[0], 1.); |
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(10, 0), gray_by_codec, gray_by_cvt); |
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} |
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// Test OpenCV issue 3075 is solved |
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TEST(Imgcodecs_Png, read_color_palette_with_alpha) |
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{ |
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const string root = cvtest::TS::ptr()->get_data_path(); |
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Mat img; |
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// First Test : Read PNG with alpha, imread flag -1 |
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img = imread(root + "readwrite/color_palette_alpha.png", IMREAD_UNCHANGED); |
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ASSERT_FALSE(img.empty()); |
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ASSERT_TRUE(img.channels() == 4); |
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// pixel is red in BGRA |
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EXPECT_EQ(img.at<Vec4b>(0, 0), Vec4b(0, 0, 255, 255)); |
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EXPECT_EQ(img.at<Vec4b>(0, 1), Vec4b(0, 0, 255, 255)); |
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// Second Test : Read PNG without alpha, imread flag -1 |
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img = imread(root + "readwrite/color_palette_no_alpha.png", IMREAD_UNCHANGED); |
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ASSERT_FALSE(img.empty()); |
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ASSERT_TRUE(img.channels() == 3); |
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// pixel is red in BGR |
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EXPECT_EQ(img.at<Vec3b>(0, 0), Vec3b(0, 0, 255)); |
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EXPECT_EQ(img.at<Vec3b>(0, 1), Vec3b(0, 0, 255)); |
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// Third Test : Read PNG with alpha, imread flag 1 |
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img = imread(root + "readwrite/color_palette_alpha.png", IMREAD_COLOR); |
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ASSERT_FALSE(img.empty()); |
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ASSERT_TRUE(img.channels() == 3); |
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// pixel is red in BGR |
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EXPECT_EQ(img.at<Vec3b>(0, 0), Vec3b(0, 0, 255)); |
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EXPECT_EQ(img.at<Vec3b>(0, 1), Vec3b(0, 0, 255)); |
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// Fourth Test : Read PNG without alpha, imread flag 1 |
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img = imread(root + "readwrite/color_palette_no_alpha.png", IMREAD_COLOR); |
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ASSERT_FALSE(img.empty()); |
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ASSERT_TRUE(img.channels() == 3); |
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// pixel is red in BGR |
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EXPECT_EQ(img.at<Vec3b>(0, 0), Vec3b(0, 0, 255)); |
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EXPECT_EQ(img.at<Vec3b>(0, 1), Vec3b(0, 0, 255)); |
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} |
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#endif // HAVE_PNG |
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}} // namespace
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