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934e6899f8
imgcodecs: Add rgb flag for imread and imdecode #25809 Try to `imread` images by RGB to save R-B swapping costs. ## How to use it? ``` img_rgb = cv2.imread("PATH", IMREAD_COLOR_RGB) # OpenCV decode the image by RGB format. ``` ## TODO - [x] Fix the broken code - [x] Add imread rgb test - [x] Speed test of rgb mode. ## Performance test | file name | IMREAD_COLOR | IMREAD_COLOR_RGB | | --------- | ------ | --------- | | jpg01 | 284 ms | 277 ms | | jpg02 | 376 ms | 366 ms | | png01 | 62 ms | 60 ms | | Png02 | 97 ms | 94 ms | Test with [image_test.zip](https://github.com/user-attachments/files/15982949/image_test.zip) ```.cpp string img_path = "/Users/mzh/work/data/image_test/png02.png"; int loop = 20; TickMeter t; double t0 = 10000; for (int i = 0; i < loop; i++) { t.reset(); t.start(); img_bgr = imread(img_path, IMREAD_COLOR); t.stop(); if (t.getTimeMilli() < t0) t0 = t.getTimeMilli(); } std::cout<<"bgr time = "<<t0<<std::endl; t0 = 10000; for (int i = 0; i < loop; i++) { t.reset(); t.start(); img_rgb = imread(img_path, IMREAD_COLOR_RGB); t.stop(); if (t.getTimeMilli() < t0) t0 = t.getTimeMilli(); } std::cout<<"rgb time = "<<t0<<std::endl; ``` ### 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 - [ ] There is a reference to the original bug report and related work - [ ] 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
546 lines
16 KiB
C++
546 lines
16 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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#include "test_common.hpp"
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namespace opencv_test { namespace {
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/* < <file_name, image_size>, <imread mode, scale> > */
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typedef tuple< tuple<string, Size>, tuple<ImreadModes, int> > Imgcodecs_Resize_t;
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typedef testing::TestWithParam< Imgcodecs_Resize_t > Imgcodecs_Resize;
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/* resize_flag_and_dims = <imread_flag, scale>*/
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const tuple <ImreadModes, int> resize_flag_and_dims[] =
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{
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make_tuple(IMREAD_UNCHANGED, 1),
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make_tuple(IMREAD_REDUCED_GRAYSCALE_2, 2),
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make_tuple(IMREAD_REDUCED_GRAYSCALE_4, 4),
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make_tuple(IMREAD_REDUCED_GRAYSCALE_8, 8),
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make_tuple(IMREAD_REDUCED_COLOR_2, 2),
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make_tuple(IMREAD_REDUCED_COLOR_4, 4),
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make_tuple(IMREAD_REDUCED_COLOR_8, 8)
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};
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const tuple<string, Size> images[] =
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{
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#ifdef HAVE_JPEG
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make_tuple<string, Size>("../cv/imgproc/stuff.jpg", Size(640, 480)),
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#endif
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#if defined(HAVE_PNG) || defined(HAVE_SPNG)
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make_tuple<string, Size>("../cv/shared/pic1.png", Size(400, 300)),
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#endif
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make_tuple<string, Size>("../highgui/readwrite/ordinary.bmp", Size(480, 272)),
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};
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TEST_P(Imgcodecs_Resize, imread_reduce_flags)
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{
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const string file_name = findDataFile(get<0>(get<0>(GetParam())));
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const Size imageSize = get<1>(get<0>(GetParam()));
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const int imread_flag = get<0>(get<1>(GetParam()));
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const int scale = get<1>(get<1>(GetParam()));
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const int cols = imageSize.width / scale;
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const int rows = imageSize.height / scale;
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{
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Mat img = imread(file_name, imread_flag);
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ASSERT_FALSE(img.empty());
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EXPECT_EQ(cols, img.cols);
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EXPECT_EQ(rows, img.rows);
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}
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}
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//==================================================================================================
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TEST_P(Imgcodecs_Resize, imdecode_reduce_flags)
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{
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const string file_name = findDataFile(get<0>(get<0>(GetParam())));
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const Size imageSize = get<1>(get<0>(GetParam()));
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const int imread_flag = get<0>(get<1>(GetParam()));
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const int scale = get<1>(get<1>(GetParam()));
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const int cols = imageSize.width / scale;
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const int rows = imageSize.height / scale;
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const std::ios::openmode mode = std::ios::in | std::ios::binary;
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std::ifstream ifs(file_name.c_str(), mode);
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ASSERT_TRUE(ifs.is_open());
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ifs.seekg(0, std::ios::end);
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const size_t sz = static_cast<size_t>(ifs.tellg());
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ifs.seekg(0, std::ios::beg);
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std::vector<char> content(sz);
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ifs.read((char*)content.data(), sz);
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ASSERT_FALSE(ifs.fail());
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{
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Mat img = imdecode(Mat(content), imread_flag);
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ASSERT_FALSE(img.empty());
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EXPECT_EQ(cols, img.cols);
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EXPECT_EQ(rows, img.rows);
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}
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}
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//==================================================================================================
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INSTANTIATE_TEST_CASE_P(/*nothing*/, Imgcodecs_Resize,
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testing::Combine(
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testing::ValuesIn(images),
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testing::ValuesIn(resize_flag_and_dims)
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)
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);
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//==================================================================================================
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TEST(Imgcodecs_Image, read_write_bmp)
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{
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const size_t IMAGE_COUNT = 10;
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const double thresDbell = 32;
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for (size_t i = 0; i < IMAGE_COUNT; ++i)
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{
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stringstream s; s << i;
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const string digit = s.str();
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const string src_name = TS::ptr()->get_data_path() + "../python/images/QCIF_0" + digit + ".bmp";
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const string dst_name = cv::tempfile((digit + ".bmp").c_str());
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Mat image = imread(src_name);
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ASSERT_FALSE(image.empty());
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resize(image, image, Size(968, 757), 0.0, 0.0, INTER_CUBIC);
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imwrite(dst_name, image);
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Mat loaded = imread(dst_name);
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ASSERT_FALSE(loaded.empty());
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double psnr = cvtest::PSNR(loaded, image);
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EXPECT_GT(psnr, thresDbell);
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vector<uchar> from_file;
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FILE *f = fopen(dst_name.c_str(), "rb");
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fseek(f, 0, SEEK_END);
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long len = ftell(f);
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from_file.resize((size_t)len);
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fseek(f, 0, SEEK_SET);
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from_file.resize(fread(&from_file[0], 1, from_file.size(), f));
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fclose(f);
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vector<uchar> buf;
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imencode(".bmp", image, buf);
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ASSERT_EQ(buf, from_file);
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Mat buf_loaded = imdecode(Mat(buf), 1);
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ASSERT_FALSE(buf_loaded.empty());
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psnr = cvtest::PSNR(buf_loaded, image);
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EXPECT_GT(psnr, thresDbell);
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EXPECT_EQ(0, remove(dst_name.c_str()));
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}
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}
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//==================================================================================================
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typedef string Ext;
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typedef testing::TestWithParam<Ext> Imgcodecs_Image;
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const string exts[] = {
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#if defined(HAVE_PNG) || defined(HAVE_SPNG)
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"png",
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#endif
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#ifdef HAVE_TIFF
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"tiff",
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#endif
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#ifdef HAVE_JPEG
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"jpg",
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#endif
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#if (defined(HAVE_JASPER) && defined(OPENCV_IMGCODECS_ENABLE_JASPER_TESTS)) \
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|| defined(HAVE_OPENJPEG)
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"jp2",
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#endif
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#if 0 /*defined HAVE_OPENEXR && !defined __APPLE__*/
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"exr",
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#endif
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"bmp",
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#ifdef HAVE_IMGCODEC_PXM
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"ppm",
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#endif
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#ifdef HAVE_IMGCODEC_SUNRASTER
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"ras",
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#endif
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};
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static
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void test_image_io(const Mat& image, const std::string& fname, const std::string& ext, int imreadFlag, double psnrThreshold)
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{
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vector<uchar> buf;
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ASSERT_NO_THROW(imencode("." + ext, image, buf));
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ASSERT_NO_THROW(imwrite(fname, image));
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FILE *f = fopen(fname.c_str(), "rb");
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fseek(f, 0, SEEK_END);
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long len = ftell(f);
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cout << "File size: " << len << " bytes" << endl;
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EXPECT_GT(len, 1024) << "File is small. Test or implementation is broken";
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fseek(f, 0, SEEK_SET);
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vector<uchar> file_buf((size_t)len);
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EXPECT_EQ(len, (long)fread(&file_buf[0], 1, (size_t)len, f));
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fclose(f); f = NULL;
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EXPECT_EQ(buf, file_buf) << "imwrite() / imencode() calls must provide the same output (bit-exact)";
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Mat buf_loaded = imdecode(Mat(buf), imreadFlag);
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EXPECT_FALSE(buf_loaded.empty());
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if (imreadFlag & IMREAD_COLOR_RGB && imreadFlag != -1)
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{
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cvtColor(buf_loaded, buf_loaded, COLOR_RGB2BGR);
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}
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Mat loaded = imread(fname, imreadFlag);
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EXPECT_FALSE(loaded.empty());
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if (imreadFlag & IMREAD_COLOR_RGB && imreadFlag != -1)
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{
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cvtColor(loaded, loaded, COLOR_RGB2BGR);
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}
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EXPECT_EQ(0, cv::norm(loaded, buf_loaded, NORM_INF)) << "imread() and imdecode() calls must provide the same result (bit-exact)";
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double psnr = cvtest::PSNR(loaded, image);
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EXPECT_GT(psnr, psnrThreshold);
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// not necessary due bitexact check above
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//double buf_psnr = cvtest::PSNR(buf_loaded, image);
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//EXPECT_GT(buf_psnr, psnrThreshold);
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#if 0 // debug
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if (psnr <= psnrThreshold /*|| buf_psnr <= thresDbell*/)
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{
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cout << "File: " << fname << endl;
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imshow("origin", image);
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imshow("imread", loaded);
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imshow("imdecode", buf_loaded);
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waitKey();
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}
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#endif
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}
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TEST_P(Imgcodecs_Image, read_write_BGR)
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{
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const string ext = this->GetParam();
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const string fname = cv::tempfile(ext.c_str());
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double psnrThreshold = 100;
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if (ext == "jpg")
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psnrThreshold = 32;
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#if defined(HAVE_JASPER)
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if (ext == "jp2")
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psnrThreshold = 95;
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#elif defined(HAVE_OPENJPEG)
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if (ext == "jp2")
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psnrThreshold = 35;
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#endif
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Mat image = generateTestImageBGR();
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EXPECT_NO_THROW(test_image_io(image, fname, ext, IMREAD_COLOR, psnrThreshold));
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EXPECT_NO_THROW(test_image_io(image, fname, ext, IMREAD_COLOR_RGB, psnrThreshold));
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EXPECT_EQ(0, remove(fname.c_str()));
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}
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TEST_P(Imgcodecs_Image, read_write_GRAYSCALE)
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{
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const string ext = this->GetParam();
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if (false
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|| ext == "ppm" // grayscale is not implemented
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|| ext == "ras" // broken (black result)
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)
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throw SkipTestException("GRAYSCALE mode is not supported");
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const string fname = cv::tempfile(ext.c_str());
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double psnrThreshold = 100;
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if (ext == "jpg")
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psnrThreshold = 40;
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#if defined(HAVE_JASPER)
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if (ext == "jp2")
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psnrThreshold = 70;
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#elif defined(HAVE_OPENJPEG)
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if (ext == "jp2")
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psnrThreshold = 35;
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#endif
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Mat image = generateTestImageGrayscale();
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EXPECT_NO_THROW(test_image_io(image, fname, ext, IMREAD_GRAYSCALE, psnrThreshold));
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EXPECT_EQ(0, remove(fname.c_str()));
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}
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INSTANTIATE_TEST_CASE_P(imgcodecs, Imgcodecs_Image, testing::ValuesIn(exts));
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TEST(Imgcodecs_Image, regression_9376)
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{
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String path = findDataFile("readwrite/regression_9376.bmp");
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Mat m = imread(path);
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ASSERT_FALSE(m.empty());
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EXPECT_EQ(32, m.cols);
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EXPECT_EQ(32, m.rows);
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}
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TEST(Imgcodecs_Image, imread_overload)
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{
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const string root = cvtest::TS::ptr()->get_data_path();
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const string imgName = findDataFile("../highgui/readwrite/ordinary.bmp");
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Mat ref = imread(imgName);
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ASSERT_FALSE(ref.empty());
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{
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Mat img(ref.size(), ref.type(), Scalar::all(0)); // existing image
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void * ptr = img.data;
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imread(imgName, img);
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ASSERT_FALSE(img.empty());
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EXPECT_EQ(cv::norm(ref, img, NORM_INF), 0);
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EXPECT_EQ(img.data, ptr); // no reallocation
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}
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{
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Mat img; // empty image
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imread(imgName, img);
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ASSERT_FALSE(img.empty());
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EXPECT_EQ(cv::norm(ref, img, NORM_INF), 0);
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}
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{
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UMat img; // empty UMat
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imread(imgName, img);
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ASSERT_FALSE(img.empty());
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EXPECT_EQ(cv::norm(ref, img, NORM_INF), 0);
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}
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}
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//==================================================================================================
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TEST(Imgcodecs_Image, write_umat)
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{
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const string src_name = TS::ptr()->get_data_path() + "../python/images/baboon.bmp";
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const string dst_name = cv::tempfile(".bmp");
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Mat image1 = imread(src_name);
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ASSERT_FALSE(image1.empty());
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UMat image1_umat = image1.getUMat(ACCESS_RW);
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imwrite(dst_name, image1_umat);
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Mat image2 = imread(dst_name);
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ASSERT_FALSE(image2.empty());
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), image1, image2);
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EXPECT_EQ(0, remove(dst_name.c_str()));
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}
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#ifdef HAVE_TIFF
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TEST(Imgcodecs_Image, multipage_collection_size)
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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/multipage.tif";
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ImageCollection collection(filename, IMREAD_ANYCOLOR);
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EXPECT_EQ((std::size_t)6, collection.size());
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}
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TEST(Imgcodecs_Image, multipage_collection_read_pages_iterator)
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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/multipage.tif";
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const string page_files[] = {
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root + "readwrite/multipage_p1.tif",
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root + "readwrite/multipage_p2.tif",
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root + "readwrite/multipage_p3.tif",
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root + "readwrite/multipage_p4.tif",
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root + "readwrite/multipage_p5.tif",
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root + "readwrite/multipage_p6.tif"
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};
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ImageCollection collection(filename, IMREAD_ANYCOLOR);
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auto collectionBegin = collection.begin();
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for(size_t i = 0; i < collection.size(); ++i, ++collectionBegin)
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{
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double diff = cv::norm(collectionBegin.operator*(), imread(page_files[i]), NORM_INF);
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EXPECT_EQ(0., diff);
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}
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}
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TEST(Imgcodecs_Image, multipage_collection_two_iterator)
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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/multipage.tif";
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const string page_files[] = {
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root + "readwrite/multipage_p1.tif",
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root + "readwrite/multipage_p2.tif",
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root + "readwrite/multipage_p3.tif",
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root + "readwrite/multipage_p4.tif",
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root + "readwrite/multipage_p5.tif",
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root + "readwrite/multipage_p6.tif"
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};
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ImageCollection collection(filename, IMREAD_ANYCOLOR);
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auto firstIter = collection.begin();
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auto secondIter = collection.begin();
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// Decode all odd pages then decode even pages -> 1, 0, 3, 2 ...
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firstIter++;
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for(size_t i = 1; i < collection.size(); i += 2, ++firstIter, ++firstIter, ++secondIter, ++secondIter) {
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Mat mat = *firstIter;
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double diff = cv::norm(mat, imread(page_files[i]), NORM_INF);
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EXPECT_EQ(0., diff);
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Mat evenMat = *secondIter;
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diff = cv::norm(evenMat, imread(page_files[i-1]), NORM_INF);
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EXPECT_EQ(0., diff);
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}
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}
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TEST(Imgcodecs_Image, multipage_collection_operator_plusplus)
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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/multipage.tif";
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// operator++ test
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ImageCollection collection(filename, IMREAD_ANYCOLOR);
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auto firstIter = collection.begin();
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auto secondIter = firstIter++;
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// firstIter points to second page, secondIter points to first page
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double diff = cv::norm(*firstIter, *secondIter, NORM_INF);
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EXPECT_NE(diff, 0.);
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}
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TEST(Imgcodecs_Image, multipage_collection_backward_decoding)
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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/multipage.tif";
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const string page_files[] = {
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root + "readwrite/multipage_p1.tif",
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root + "readwrite/multipage_p2.tif",
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root + "readwrite/multipage_p3.tif",
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root + "readwrite/multipage_p4.tif",
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root + "readwrite/multipage_p5.tif",
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root + "readwrite/multipage_p6.tif"
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};
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ImageCollection collection(filename, IMREAD_ANYCOLOR);
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EXPECT_EQ((size_t)6, collection.size());
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// backward decoding -> 5,4,3,2,1,0
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for(int i = (int)collection.size() - 1; i >= 0; --i)
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{
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cv::Mat ithPage = imread(page_files[i]);
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EXPECT_FALSE(ithPage.empty());
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double diff = cv::norm(collection[i], ithPage, NORM_INF);
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EXPECT_EQ(diff, 0.);
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}
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for(int i = 0; i < (int)collection.size(); ++i)
|
|
{
|
|
collection.releaseCache(i);
|
|
}
|
|
|
|
double diff = cv::norm(collection[2], imread(page_files[2]), NORM_INF);
|
|
EXPECT_EQ(diff, 0.);
|
|
}
|
|
|
|
TEST(ImgCodecs, multipage_collection_decoding_range_based_for_loop_test)
|
|
{
|
|
const string root = cvtest::TS::ptr()->get_data_path();
|
|
const string filename = root + "readwrite/multipage.tif";
|
|
const string page_files[] = {
|
|
root + "readwrite/multipage_p1.tif",
|
|
root + "readwrite/multipage_p2.tif",
|
|
root + "readwrite/multipage_p3.tif",
|
|
root + "readwrite/multipage_p4.tif",
|
|
root + "readwrite/multipage_p5.tif",
|
|
root + "readwrite/multipage_p6.tif"
|
|
};
|
|
|
|
ImageCollection collection(filename, IMREAD_ANYCOLOR);
|
|
|
|
size_t index = 0;
|
|
for(auto &i: collection)
|
|
{
|
|
cv::Mat ithPage = imread(page_files[index]);
|
|
EXPECT_FALSE(ithPage.empty());
|
|
double diff = cv::norm(i, ithPage, NORM_INF);
|
|
EXPECT_EQ(0., diff);
|
|
++index;
|
|
}
|
|
EXPECT_EQ(index, collection.size());
|
|
|
|
index = 0;
|
|
for(auto &&i: collection)
|
|
{
|
|
cv::Mat ithPage = imread(page_files[index]);
|
|
EXPECT_FALSE(ithPage.empty());
|
|
double diff = cv::norm(i, ithPage, NORM_INF);
|
|
EXPECT_EQ(0., diff);
|
|
++index;
|
|
}
|
|
EXPECT_EQ(index, collection.size());
|
|
}
|
|
|
|
TEST(ImgCodecs, multipage_collection_two_iterator_operatorpp)
|
|
{
|
|
const string root = cvtest::TS::ptr()->get_data_path();
|
|
const string filename = root + "readwrite/multipage.tif";
|
|
|
|
ImageCollection imcol(filename, IMREAD_ANYCOLOR);
|
|
|
|
auto it0 = imcol.begin(), it1 = it0, it2 = it0;
|
|
vector<Mat> img(6);
|
|
for (int i = 0; i < 6; i++) {
|
|
img[i] = *it0;
|
|
it0->release();
|
|
++it0;
|
|
}
|
|
|
|
for (int i = 0; i < 3; i++) {
|
|
++it2;
|
|
}
|
|
|
|
for (int i = 0; i < 3; i++) {
|
|
auto img2 = *it2;
|
|
auto img1 = *it1;
|
|
++it2;
|
|
++it1;
|
|
EXPECT_TRUE(cv::norm(img2, img[i+3], NORM_INF) == 0);
|
|
EXPECT_TRUE(cv::norm(img1, img[i], NORM_INF) == 0);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
TEST(Imgcodecs_Params, imwrite_regression_22752)
|
|
{
|
|
const Mat img(16, 16, CV_8UC3, cv::Scalar::all(0));
|
|
vector<int> params;
|
|
params.push_back(IMWRITE_JPEG_QUALITY);
|
|
// params.push_back(100)); // Forget it.
|
|
EXPECT_ANY_THROW(cv::imwrite("test.jpg", img, params)); // parameters size or missing JPEG codec
|
|
}
|
|
|
|
TEST(Imgcodecs_Params, imencode_regression_22752)
|
|
{
|
|
const Mat img(16, 16, CV_8UC3, cv::Scalar::all(0));
|
|
vector<int> params;
|
|
params.push_back(IMWRITE_JPEG_QUALITY);
|
|
// params.push_back(100)); // Forget it.
|
|
vector<uchar> buf;
|
|
EXPECT_ANY_THROW(cv::imencode("test.jpg", img, buf, params)); // parameters size or missing JPEG codec
|
|
}
|
|
|
|
}} // namespace
|