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Merge pull request #26181 from sturkmen72:png_exif_test
Enable PNG exif orientation testpull/26460/head
Alexander Smorkalov
2 weeks ago
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commit
11a4a06fa4
6 changed files with 155 additions and 229 deletions
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// 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
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// directory 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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/**
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* Test to check whether the EXIF orientation tag was processed successfully or not. |
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* The test uses a set of 8 images named testExifOrientation_{1 to 8}.(extension). |
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* Each test image is a 10x10 square, divided into four smaller 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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* Each image contains an EXIF field with an 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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* Note: |
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* The flags parameter of the imread function is set as IMREAD_COLOR | IMREAD_ANYCOLOR | IMREAD_ANYDEPTH. |
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* Using this combination is an undocumented trick to load images similarly to the IMREAD_UNCHANGED flag, |
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* preserving the alpha channel (if present) while also applying the orientation. |
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*/ |
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typedef testing::TestWithParam<string> Exif; |
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TEST_P(Exif, exif_orientation) |
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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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// Refer to the note in the explanation above.
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Mat m_img = imread(filename, IMREAD_COLOR | IMREAD_ANYCOLOR | IMREAD_ANYDEPTH); |
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ASSERT_FALSE(m_img.empty()); |
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if (m_img.channels() == 3) |
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{ |
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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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else |
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{ |
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Vec4b vec; |
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//Checking the first quadrant (with supposed red)
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vec = m_img.at<Vec4b>(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<Vec4b>(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<Vec4b>(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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} |
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const string exif_files[] = |
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{ |
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#ifdef HAVE_JPEG |
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"readwrite/testExifOrientation_1.jpg", |
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"readwrite/testExifOrientation_2.jpg", |
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"readwrite/testExifOrientation_3.jpg", |
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"readwrite/testExifOrientation_4.jpg", |
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"readwrite/testExifOrientation_5.jpg", |
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"readwrite/testExifOrientation_6.jpg", |
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"readwrite/testExifOrientation_7.jpg", |
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"readwrite/testExifOrientation_8.jpg", |
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#endif |
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#ifdef OPENCV_IMGCODECS_PNG_WITH_EXIF |
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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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#endif |
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#ifdef HAVE_AVIF |
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"readwrite/testExifOrientation_1.avif", |
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"readwrite/testExifOrientation_2.avif", |
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"readwrite/testExifOrientation_3.avif", |
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"readwrite/testExifOrientation_4.avif", |
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"readwrite/testExifOrientation_5.avif", |
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"readwrite/testExifOrientation_6.avif", |
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"readwrite/testExifOrientation_7.avif", |
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"readwrite/testExifOrientation_8.avif", |
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#endif |
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}; |
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INSTANTIATE_TEST_CASE_P(Imgcodecs, Exif, |
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testing::ValuesIn(exif_files)); |
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} |
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} |
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