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[GSoC] Add GIF decode and encode for imgcodecs #25691 this is related to #24855 we add gif support for `imread`, `imreadmulti`, `imwrite` and `imwritemulti` opencv_extra: https://github.com/opencv/opencv_extra/pull/1203 ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [x] The PR is proposed to the proper branch - [x] There is a reference to the original bug report and related work - [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [ ] The feature is well documented and sample code can be built with the project CMake
358 lines
12 KiB
C++
358 lines
12 KiB
C++
// 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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#ifdef HAVE_IMGCODEC_GIF
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namespace opencv_test { namespace {
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const string gifsuite_files_multi[]={
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"basi3p01",
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"basi3p02",
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"basi3p04",
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"basn3p01",
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"basn3p02",
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"basn3p04",
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"ccwn3p08",
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"ch1n3p04",
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"cs3n3p08",
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"cs5n3p08",
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"cs8n3p08",
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"g03n3p04",
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"g04n3p04",
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"g05n3p04",
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"g07n3p04",
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"g10n3p04",
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"g25n3p04",
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"s32i3p04",
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"s32n3p04",
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"tp0n3p08",
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};
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const string gifsuite_files_read_single[] = {
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"basi3p01",
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"basi3p02",
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"basi3p04",
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"basn3p01",
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"basn3p02",
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"basn3p04",
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"ccwn3p08",
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"cdfn2c08",
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"cdhn2c08",
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"cdsn2c08",
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"cdun2c08",
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"ch1n3p04",
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"cs3n3p08",
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"cs5n2c08",
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"cs5n3p08",
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"cs8n2c08",
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"cs8n3p08",
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"exif2c08",
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"g03n2c08",
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"g03n3p04",
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"g04n2c08",
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"g04n3p04",
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"g05n2c08",
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"g05n3p04",
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"g07n2c08",
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"g07n3p04",
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"g10n2c08",
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"g10n3p04"
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};
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const string gifsuite_files_read_write_suite[]={
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"g25n2c08",
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"g25n3p04",
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"s01i3p01",
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"s01n3p01",
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"s02i3p01",
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"s02n3p01",
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"s03i3p01",
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"s03n3p01",
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"s04i3p01",
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"s04n3p01",
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"s05i3p02",
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"s05n3p02",
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"s06i3p02",
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"s06n3p02",
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"s07i3p02",
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"s07n3p02",
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"s08i3p02",
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"s08n3p02",
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"s09i3p02",
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"s09n3p02",
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"s32i3p04",
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"s32n3p04",
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"s33i3p04",
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"s33n3p04",
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"s34i3p04",
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"s34n3p04",
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"s35i3p04",
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"s35n3p04",
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"s36i3p04",
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"s36n3p04",
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"s37i3p04",
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"s37n3p04",
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"s38i3p04",
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"s38n3p04",
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"s39i3p04",
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"s39n3p04",
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"s40i3p04",
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"s40n3p04",
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"tp0n3p08",
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};
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const std::pair<string,int> gifsuite_files_bgra[]={
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make_pair("gif_bgra1",53287),
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make_pair("gif_bgra2",52651),
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make_pair("gif_bgra3",54809),
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make_pair("gif_bgra4",57562),
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make_pair("gif_bgra5",56733),
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make_pair("gif_bgra6",52110),
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};
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TEST(Imgcodecs_Gif, read_gif_multi)
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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 + "gifsuite/gif_multi.gif";
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vector<cv::Mat> img_vec_8UC4;
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ASSERT_NO_THROW(cv::imreadmulti(filename, img_vec_8UC4,0,20,IMREAD_UNCHANGED));
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EXPECT_EQ(img_vec_8UC4.size(), imcount(filename));
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vector<cv::Mat> img_vec_8UC3;
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for(const auto & i : img_vec_8UC4){
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cv::Mat img_tmp;
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cvtColor(i,img_tmp,COLOR_BGRA2BGR);
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img_vec_8UC3.push_back(img_tmp);
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}
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const long unsigned int expected_size=20;
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EXPECT_EQ(img_vec_8UC3.size(),expected_size);
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for(long unsigned int i=0;i<img_vec_8UC3.size();i++){
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cv::Mat img=img_vec_8UC3[i];
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const string png_filename = root + "pngsuite/" + gifsuite_files_multi[i] + ".png";
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cv::Mat img_png;
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ASSERT_NO_THROW(img_png = imread(png_filename,IMREAD_UNCHANGED));
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ASSERT_FALSE(img_png.empty());
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), img, img_png);
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}
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}
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typedef testing::TestWithParam<string> Imgcodecs_Gif_GifSuite_SingleFrame;
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TEST_P(Imgcodecs_Gif_GifSuite_SingleFrame, read_gif_single)
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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 + "gifsuite/" + GetParam() + ".gif";
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const string png_filename=root + "pngsuite/" + GetParam() + ".png";
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const long unsigned int expected_size = 1;
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EXPECT_EQ(expected_size, imcount(filename));
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cv::Mat img_8UC4;
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ASSERT_NO_THROW(img_8UC4 = cv::imread(filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(img_8UC4.empty());
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cv::Mat img_8UC3;
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ASSERT_NO_THROW(cvtColor(img_8UC4, img_8UC3, COLOR_BGRA2BGR));
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cv::Mat img_png;
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ASSERT_NO_THROW(img_png = cv::imread(png_filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(img_png.empty());
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), img_8UC3, img_png);
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}
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INSTANTIATE_TEST_CASE_P(/*nothing*/, Imgcodecs_Gif_GifSuite_SingleFrame,
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testing::ValuesIn(gifsuite_files_read_single));
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TEST(Imgcodecs_Gif, read_gif_big){
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const string root = cvtest::TS::ptr()->get_data_path();
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const string gif_filename = root + "gifsuite/gif_big.gif";
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const string png_filename = root + "gifsuite/gif_big.png";
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cv::Mat img_8UC4;
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ASSERT_NO_THROW(img_8UC4 = imread(gif_filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(img_8UC4.empty());
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cv::Mat img_8UC3;
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const int expected_col=1303;
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const int expected_row=1391;
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EXPECT_EQ(expected_col, img_8UC4.cols);
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EXPECT_EQ(expected_row, img_8UC4.rows);
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ASSERT_NO_THROW(cvtColor(img_8UC4, img_8UC3,COLOR_BGRA2BGR));
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EXPECT_EQ(expected_col, img_8UC3.cols);
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EXPECT_EQ(expected_row, img_8UC3.rows);
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cv::Mat img_png;
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ASSERT_NO_THROW(img_png=imread(png_filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(img_png.empty());
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cv::Mat img_png_8UC3;
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ASSERT_NO_THROW(cvtColor(img_png,img_png_8UC3, COLOR_BGRA2BGR));
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EXPECT_EQ(img_8UC3.size, img_png_8UC3.size);
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), img_8UC3, img_png_8UC3);
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}
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typedef testing::TestWithParam<std::pair<string,int>> Imgcodecs_Gif_GifSuite_SingleFrame_BGRA;
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TEST_P(Imgcodecs_Gif_GifSuite_SingleFrame_BGRA, read_gif_single_bgra){
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const string root = cvtest::TS::ptr()->get_data_path();
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const string gif_filename = root + "gifsuite/" + GetParam().first + ".gif";
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const string png_filename = root + "gifsuite/" + GetParam().first + ".png";
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cv::Mat gif_img;
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cv::Mat png_img;
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ASSERT_NO_THROW(gif_img = cv::imread(gif_filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(gif_img.empty());
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ASSERT_NO_THROW(png_img = cv::imread(png_filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(png_img.empty());
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), gif_img, png_img);
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int transparent_count = 0;
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for(int i=0; i<gif_img.rows; i++){
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for(int j=0; j<gif_img.cols; j++){
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cv::Vec4b pixel1 = gif_img.at<cv::Vec4b>(i,j);
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if((int)(pixel1[3]) == 0){
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transparent_count++;
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}
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}
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}
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EXPECT_EQ(transparent_count,GetParam().second);
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}
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INSTANTIATE_TEST_CASE_P(/*nothing*/, Imgcodecs_Gif_GifSuite_SingleFrame_BGRA ,
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testing::ValuesIn(gifsuite_files_bgra));
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TEST(Imgcodecs_Gif,read_gif_multi_bgra){
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const string root = cvtest::TS::ptr()->get_data_path();
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const string gif_filename = root + "gifsuite/gif_multi_bgra.gif";
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vector<cv::Mat> img_vec;
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ASSERT_NO_THROW(cv::imreadmulti(gif_filename, img_vec, IMREAD_UNCHANGED));
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EXPECT_EQ(imcount(gif_filename), img_vec.size());
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const int fixed_transparent_count = 53211;
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for(auto & frame_count : img_vec){
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int transparent_count=0;
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for(int i=0; i<frame_count.rows; i++){
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for(int j=0; j<frame_count.cols; j++){
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cv::Vec4b pixel1 = frame_count.at<cv::Vec4b>(i,j);
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if((int)(pixel1[3]) == 0){
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transparent_count++;
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}
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}
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}
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EXPECT_EQ(fixed_transparent_count,transparent_count);
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}
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}
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TEST(Imgcodecs_Gif, read_gif_special){
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const string root = cvtest::TS::ptr()->get_data_path();
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const string gif_filename1 = root + "gifsuite/special1.gif";
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const string png_filename1 = root + "gifsuite/special1.png";
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const string gif_filename2 = root + "gifsuite/special2.gif";
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const string png_filename2 = root + "gifsuite/special2.png";
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cv::Mat gif_img1;
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ASSERT_NO_THROW(gif_img1 = cv::imread(gif_filename1,IMREAD_UNCHANGED));
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ASSERT_FALSE(gif_img1.empty());
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cv::Mat png_img1;
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ASSERT_NO_THROW(png_img1 = cv::imread(png_filename1,IMREAD_UNCHANGED));
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ASSERT_FALSE(png_img1.empty());
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), gif_img1, png_img1);
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cv::Mat gif_img2;
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ASSERT_NO_THROW(gif_img2 = cv::imread(gif_filename2,IMREAD_UNCHANGED));
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ASSERT_FALSE(gif_img2.empty());
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cv::Mat png_img2;
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ASSERT_NO_THROW(png_img2 = cv::imread(png_filename2,IMREAD_UNCHANGED));
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ASSERT_FALSE(png_img2.empty());
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), gif_img2, png_img2);
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}
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TEST(Imgcodecs_Gif,write_gif_flags){
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const string root = cvtest::TS::ptr()->get_data_path();
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const string png_filename = root + "gifsuite/special1.png";
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vector<uchar> buff;
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const int expected_rows=611;
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const int expected_cols=293;
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Mat img_gt = Mat::ones(expected_rows, expected_cols, CV_8UC1);
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vector<int> param;
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param.push_back(IMWRITE_GIF_QUALITY);
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param.push_back(7);
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param.push_back(IMWRITE_GIF_DITHER);
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param.push_back(2);
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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_EQ(img.cols, expected_cols);
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EXPECT_EQ(img.rows, expected_rows);
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), img, img_gt);
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}
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TEST(Imgcodecs_Gif, write_gif_big) {
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const string root = cvtest::TS::ptr()->get_data_path();
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const string png_filename = root + "gifsuite/gif_big.png";
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const string gif_filename = cv::tempfile(".png");
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cv::Mat img;
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ASSERT_NO_THROW(img = cv::imread(png_filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(img.empty());
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EXPECT_EQ(1303, img.cols);
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EXPECT_EQ(1391, img.rows);
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ASSERT_NO_THROW(imwrite(gif_filename, img));
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cv::Mat img_gif;
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ASSERT_NO_THROW(img_gif = cv::imread(gif_filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(img_gif.empty());
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EXPECT_EQ(1303, img_gif.cols);
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EXPECT_EQ(1391, img_gif.rows);
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EXPECT_EQ(0, remove(gif_filename.c_str()));
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}
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typedef testing::TestWithParam<string> Imgcodecs_Gif_GifSuite_Read_Write_Suite;
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TEST_P(Imgcodecs_Gif_GifSuite_Read_Write_Suite ,read_gif_single)
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{
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const string root = cvtest::TS::ptr()->get_data_path();
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const string png_filename = root + "pngsuite/"+GetParam()+".png";
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const string gif_filename = cv::tempfile(".gif");
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cv::Mat img;
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ASSERT_NO_THROW(img = cv::imread(png_filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(img.empty());
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vector<int> param;
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param.push_back(IMWRITE_GIF_QUALITY);
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param.push_back(8);
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param.push_back(IMWRITE_GIF_DITHER);
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param.push_back(3);
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ASSERT_NO_THROW(imwrite(gif_filename, img, param));
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cv::Mat img_gif;
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ASSERT_NO_THROW(img_gif = cv::imread(gif_filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(img_gif.empty());
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cv::Mat img_8UC3;
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ASSERT_NO_THROW(cv::cvtColor(img_gif, img_8UC3, COLOR_BGRA2BGR));
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(29, 0), img, img_8UC3);
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EXPECT_EQ(0, remove(gif_filename.c_str()));
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}
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INSTANTIATE_TEST_CASE_P(/*nothing*/, Imgcodecs_Gif_GifSuite_Read_Write_Suite ,
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testing::ValuesIn(gifsuite_files_read_write_suite));
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TEST(Imgcodecs_Gif, write_gif_multi) {
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const string root = cvtest::TS::ptr()->get_data_path();
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const string gif_filename = cv::tempfile(".gif");
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vector<cv::Mat> img_vec;
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for (long unsigned int i = 0; i < 20; i++) {
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const string png_filename = root + "pngsuite/" + gifsuite_files_multi[i] + ".png";
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cv::Mat img;
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ASSERT_NO_THROW(img = cv::imread(png_filename, IMREAD_UNCHANGED));
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ASSERT_FALSE(img.empty());
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img_vec.push_back(img);
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}
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vector<int> param;
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param.push_back(IMWRITE_GIF_QUALITY);
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param.push_back(8);
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param.push_back(IMWRITE_GIF_DITHER);
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param.push_back(3);
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ASSERT_NO_THROW(cv::imwritemulti(gif_filename, img_vec, param));
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vector<cv::Mat> img_vec_gif;
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ASSERT_NO_THROW(cv::imreadmulti(gif_filename, img_vec_gif));
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EXPECT_EQ(img_vec.size(), img_vec_gif.size());
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for (long unsigned int i = 0; i < img_vec.size(); i++) {
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cv::Mat img_8UC3;
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ASSERT_NO_THROW(cv::cvtColor(img_vec_gif[i], img_8UC3, COLOR_BGRA2BGR));
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(29, 0), img_vec[i], img_8UC3);
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}
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EXPECT_EQ(0, remove(gif_filename.c_str()));
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}
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}//opencv_test
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}//namespace
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#endif
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