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afb91b552e
Add imread #24415 ### 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. - [x] The feature is well documented and sample code can be built with the project CMake Hello everyone, I created this new version of the imread function and I think it can be very useful in several cases. It is actually passed to it object on which you want to upload the image. The advantages can be different like in case one needs to open several large images all the same in sequence. one can use the same pointer and the system would not allocate memory each time.
424 lines
11 KiB
C++
424 lines
11 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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namespace opencv_test { namespace {
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#if defined(HAVE_PNG) || defined(HAVE_SPNG)
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TEST(Imgcodecs_Png, imread_passing_mat)
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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 ref = imread(imgName);
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Mat img(ref.size(), ref.type());
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void* ptr = img.data;
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imread(imgName, img);
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EXPECT_EQ(cv::norm(ref, img, NORM_INF), 0);
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EXPECT_EQ(img.data, ptr);
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}
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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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/**
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* Test for check whether reading exif orientation tag was processed successfully or not
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* The test info is the set of 8 images named testExifRotate_{1 to 8}.png
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* The test image is the square 10x10 points divided by four sub-squares:
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* (R corresponds to Red, G to Green, B to Blue, W to white)
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* --------- ---------
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* | R | G | | G | R |
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* |-------| - (tag 1) |-------| - (tag 2)
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* | B | W | | W | B |
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* --------- ---------
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*
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* --------- ---------
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* | W | B | | B | W |
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* |-------| - (tag 3) |-------| - (tag 4)
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* | G | R | | R | G |
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* --------- ---------
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*
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* --------- ---------
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* | R | B | | G | W |
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* |-------| - (tag 5) |-------| - (tag 6)
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* | G | W | | R | B |
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* --------- ---------
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*
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* --------- ---------
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* | W | G | | B | R |
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* |-------| - (tag 7) |-------| - (tag 8)
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* | B | R | | W | G |
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* --------- ---------
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*
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*
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* Every image contains exif field with orientation tag (0x112)
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* After reading each image and applying the orientation tag,
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* the resulting image should be:
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* ---------
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* | R | G |
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* |-------|
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* | B | W |
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* ---------
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*
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*/
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typedef testing::TestWithParam<string> Imgcodecs_PNG_Exif;
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// Solution to issue 16579: PNG read doesn't support Exif orientation data
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#ifdef OPENCV_IMGCODECS_PNG_WITH_EXIF
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TEST_P(Imgcodecs_PNG_Exif, exif_orientation)
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#else
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TEST_P(Imgcodecs_PNG_Exif, DISABLED_exif_orientation)
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#endif
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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 + GetParam();
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const int colorThresholdHigh = 250;
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const int colorThresholdLow = 5;
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Mat m_img = imread(filename);
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ASSERT_FALSE(m_img.empty());
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Vec3b vec;
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//Checking the first quadrant (with supposed red)
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vec = m_img.at<Vec3b>(2, 2); //some point inside the square
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EXPECT_LE(vec.val[0], colorThresholdLow);
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EXPECT_LE(vec.val[1], colorThresholdLow);
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EXPECT_GE(vec.val[2], colorThresholdHigh);
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//Checking the second quadrant (with supposed green)
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vec = m_img.at<Vec3b>(2, 7); //some point inside the square
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EXPECT_LE(vec.val[0], colorThresholdLow);
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EXPECT_GE(vec.val[1], colorThresholdHigh);
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EXPECT_LE(vec.val[2], colorThresholdLow);
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//Checking the third quadrant (with supposed blue)
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vec = m_img.at<Vec3b>(7, 2); //some point inside the square
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EXPECT_GE(vec.val[0], colorThresholdHigh);
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EXPECT_LE(vec.val[1], colorThresholdLow);
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EXPECT_LE(vec.val[2], colorThresholdLow);
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}
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const string exif_files[] =
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{
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"readwrite/testExifOrientation_1.png",
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"readwrite/testExifOrientation_2.png",
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"readwrite/testExifOrientation_3.png",
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"readwrite/testExifOrientation_4.png",
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"readwrite/testExifOrientation_5.png",
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"readwrite/testExifOrientation_6.png",
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"readwrite/testExifOrientation_7.png",
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"readwrite/testExifOrientation_8.png"
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};
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INSTANTIATE_TEST_CASE_P(ExifFiles, Imgcodecs_PNG_Exif,
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testing::ValuesIn(exif_files));
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typedef testing::TestWithParam<string> Imgcodecs_Png_PngSuite;
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TEST_P(Imgcodecs_Png_PngSuite, decode)
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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 + "pngsuite/" + GetParam() + ".png";
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const string xml_filename = root + "pngsuite/" + GetParam() + ".xml";
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FileStorage fs(xml_filename, FileStorage::READ);
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EXPECT_TRUE(fs.isOpened());
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Mat src = imread(filename, IMREAD_UNCHANGED);
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Mat gt;
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fs.getFirstTopLevelNode() >> gt;
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EXPECT_PRED_FORMAT2(cvtest::MatComparator(0, 0), src, gt);
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}
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const string pngsuite_files[] =
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{
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"basi0g01",
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"basi0g02",
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"basi0g04",
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"basi0g08",
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"basi0g16",
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"basi2c08",
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"basi2c16",
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"basi3p01",
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"basi3p02",
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"basi3p04",
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"basi3p08",
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"basi4a08",
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"basi4a16",
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"basi6a08",
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"basi6a16",
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"basn0g01",
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"basn0g02",
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"basn0g04",
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"basn0g08",
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"basn0g16",
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"basn2c08",
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"basn2c16",
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"basn3p01",
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"basn3p02",
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"basn3p04",
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"basn3p08",
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"basn4a08",
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"basn4a16",
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"basn6a08",
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"basn6a16",
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"bgai4a08",
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"bgai4a16",
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"bgan6a08",
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"bgan6a16",
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"bgbn4a08",
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"bggn4a16",
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"bgwn6a08",
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"bgyn6a16",
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"ccwn2c08",
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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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"ch2n3p08",
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"cm0n0g04",
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"cm7n0g04",
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"cm9n0g04",
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"cs3n2c16",
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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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"ct0n0g04",
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"ct1n0g04",
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"cten0g04",
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"ctfn0g04",
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"ctgn0g04",
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"cthn0g04",
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"ctjn0g04",
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"ctzn0g04",
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"exif2c08",
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"f00n0g08",
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"f00n2c08",
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"f01n0g08",
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"f01n2c08",
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"f02n0g08",
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"f02n2c08",
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"f03n0g08",
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"f03n2c08",
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"f04n0g08",
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"f04n2c08",
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"f99n0g04",
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"g03n0g16",
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"g03n2c08",
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"g03n3p04",
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"g04n0g16",
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"g04n2c08",
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"g04n3p04",
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"g05n0g16",
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"g05n2c08",
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"g05n3p04",
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"g07n0g16",
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"g07n2c08",
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"g07n3p04",
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"g10n0g16",
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"g10n2c08",
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"g10n3p04",
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"g25n0g16",
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"g25n2c08",
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"g25n3p04",
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"oi1n0g16",
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"oi1n2c16",
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"oi2n0g16",
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"oi2n2c16",
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"oi4n0g16",
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"oi4n2c16",
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"oi9n0g16",
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"oi9n2c16",
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"pp0n2c16",
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"pp0n6a08",
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"ps1n0g08",
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"ps1n2c16",
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"ps2n0g08",
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"ps2n2c16",
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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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"tbbn0g04",
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"tbbn2c16",
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"tbbn3p08",
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"tbgn2c16",
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"tbgn3p08",
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"tbrn2c08",
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"tbwn0g16",
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"tbwn3p08",
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"tbyn3p08",
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"tm3n3p02",
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"tp0n0g08",
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"tp0n2c08",
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"tp0n3p08",
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"tp1n3p08",
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"z00n2c08",
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"z03n2c08",
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"z06n2c08",
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"z09n2c08",
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};
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INSTANTIATE_TEST_CASE_P(/*nothing*/, Imgcodecs_Png_PngSuite,
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testing::ValuesIn(pngsuite_files));
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typedef testing::TestWithParam<string> Imgcodecs_Png_PngSuite_Corrupted;
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TEST_P(Imgcodecs_Png_PngSuite_Corrupted, decode)
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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 + "pngsuite/" + GetParam() + ".png";
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Mat src = imread(filename, IMREAD_UNCHANGED);
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// Corrupted files should not be read
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EXPECT_TRUE(src.empty());
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}
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const string pngsuite_files_corrupted[] = {
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"xc1n0g08",
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"xc9n2c08",
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"xcrn0g04",
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"xcsn0g01",
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"xd0n2c08",
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"xd3n2c08",
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"xd9n2c08",
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"xdtn0g01",
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"xhdn0g08",
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"xlfn0g04",
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"xs1n0g01",
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"xs2n0g01",
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"xs4n0g01",
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"xs7n0g01",
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};
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INSTANTIATE_TEST_CASE_P(/*nothing*/, Imgcodecs_Png_PngSuite_Corrupted,
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testing::ValuesIn(pngsuite_files_corrupted));
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#endif // HAVE_PNG
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}} // namespace
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