vendor: OpenCV 5.0.0 snapshot at 755e50675d97db9b7d449d8bd6b09888646f6c6e

modules/quality/test/test_ssim.cpp

@@ -0,0 +1,52 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
+#include "test_precomp.hpp"
+
+#define TEST_CASE_NAME CV_Quality_SSIM
+
+namespace opencv_test
+{
+namespace quality_test
+{
+
+// expected ssim per channel
+const cv::Scalar
+    SSIM_EXPECTED_1 = { .1501 }
+    , SSIM_EXPECTED_2 = { .7541, .7742, .8095 }
+    ;
+
+// static method
+TEST(TEST_CASE_NAME, static_)
+{
+    cv::Mat qMat = {};
+    quality_expect_near(quality::QualitySSIM::compute(get_testfile_1a(), get_testfile_1a(), qMat), cv::Scalar(1.)); // ref vs ref == 1.
+    check_quality_map(qMat);
+}
+
+// single channel, with/without opencl
+TEST(TEST_CASE_NAME, single_channel)
+{
+    auto fn = []() { quality_test(quality::QualitySSIM::create(get_testfile_1a()), get_testfile_1b(), SSIM_EXPECTED_1); };
+    OCL_OFF(fn());
+    OCL_ON(fn());
+}
+
+// multi-channel
+TEST(TEST_CASE_NAME, multi_channel)
+{
+    quality_test(quality::QualitySSIM::create(get_testfile_2a()), get_testfile_2b(), SSIM_EXPECTED_2);
+}
+
+// internal a/b test
+/*
+TEST(TEST_CASE_NAME, performance)
+{
+    auto ref = get_testfile_1a();
+    auto cmp = get_testfile_1b();
+    quality_performance_test("SSIM", [&]() { cv::quality::QualitySSIM::compute(ref, cmp, cv::noArray()); });
+}
+*/
+}
+} // namespace