imgcodecs(test): add OpenEXR I/O test

modules/imgcodecs/test/test_exr.impl.hpp

+// 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
+
+//#define GENERATE_DATA
+
+namespace opencv_test { namespace {
+
+TEST(Imgcodecs_EXR, readWrite_32FC1)
+{
+    const string root = cvtest::TS::ptr()->get_data_path();
+    const string filenameInput = root + "readwrite/test32FC1.exr";
+    const string filenameOutput = cv::tempfile(".exr");
+#ifndef GENERATE_DATA
+    const Mat img = cv::imread(filenameInput, IMREAD_UNCHANGED);
+#else
+    const Size sz(64, 32);
+    Mat img(sz, CV_32FC1, Scalar(0.5, 0.1, 1));
+    img(Rect(10, 5, sz.width - 30, sz.height - 20)).setTo(Scalar(1, 0, 0));
+    ASSERT_TRUE(cv::imwrite(filenameInput, img));
+#endif
+    ASSERT_FALSE(img.empty());
+    ASSERT_EQ(CV_32FC1,img.type());
+
+    ASSERT_TRUE(cv::imwrite(filenameOutput, img));
+    const Mat img2 = cv::imread(filenameOutput, IMREAD_UNCHANGED);
+    ASSERT_EQ(img2.type(), img.type());
+    ASSERT_EQ(img2.size(), img.size());
+    EXPECT_LE(cvtest::norm(img, img2, NORM_INF | NORM_RELATIVE), 1e-3);
+    EXPECT_EQ(0, remove(filenameOutput.c_str()));
+}
+
+TEST(Imgcodecs_EXR, readWrite_32FC3)
+{
+    const string root = cvtest::TS::ptr()->get_data_path();
+    const string filenameInput = root + "readwrite/test32FC3.exr";
+    const string filenameOutput = cv::tempfile(".exr");
+#ifndef GENERATE_DATA
+    const Mat img = cv::imread(filenameInput, IMREAD_UNCHANGED);
+#else
+    const Size sz(64, 32);
+    Mat img(sz, CV_32FC3, Scalar(0.5, 0.1, 1));
+    img(Rect(10, 5, sz.width - 30, sz.height - 20)).setTo(Scalar(1, 0, 0));
+    ASSERT_TRUE(cv::imwrite(filenameInput, img));
+#endif
+    ASSERT_FALSE(img.empty());
+    ASSERT_EQ(CV_32FC3, img.type());
+
+    ASSERT_TRUE(cv::imwrite(filenameOutput, img));
+    const Mat img2 = cv::imread(filenameOutput, IMREAD_UNCHANGED);
+    ASSERT_EQ(img2.type(), img.type());
+    ASSERT_EQ(img2.size(), img.size());
+    EXPECT_LE(cvtest::norm(img, img2, NORM_INF | NORM_RELATIVE), 1e-3);
+    EXPECT_EQ(0, remove(filenameOutput.c_str()));
+}
+
+
+TEST(Imgcodecs_EXR, readWrite_32FC1_half)
+{
+    const string root = cvtest::TS::ptr()->get_data_path();
+    const string filenameInput = root + "readwrite/test32FC1_half.exr";
+    const string filenameOutput = cv::tempfile(".exr");
+
+    std::vector<int> params;
+    params.push_back(IMWRITE_EXR_TYPE);
+    params.push_back(IMWRITE_EXR_TYPE_HALF);
+
+#ifndef GENERATE_DATA
+    const Mat img = cv::imread(filenameInput, IMREAD_UNCHANGED);
+#else
+    const Size sz(64, 32);
+    Mat img(sz, CV_32FC1, Scalar(0.5, 0.1, 1));
+    img(Rect(10, 5, sz.width - 30, sz.height - 20)).setTo(Scalar(1, 0, 0));
+    ASSERT_TRUE(cv::imwrite(filenameInput, img, params));
+#endif
+    ASSERT_FALSE(img.empty());
+    ASSERT_EQ(CV_32FC1,img.type());
+
+    ASSERT_TRUE(cv::imwrite(filenameOutput, img, params));
+    const Mat img2 = cv::imread(filenameOutput, IMREAD_UNCHANGED);
+    ASSERT_EQ(img2.type(), img.type());
+    ASSERT_EQ(img2.size(), img.size());
+    EXPECT_LE(cvtest::norm(img, img2, NORM_INF | NORM_RELATIVE), 1e-3);
+    EXPECT_EQ(0, remove(filenameOutput.c_str()));
+}
+
+TEST(Imgcodecs_EXR, readWrite_32FC3_half)
+{
+    const string root = cvtest::TS::ptr()->get_data_path();
+    const string filenameInput = root + "readwrite/test32FC3_half.exr";
+    const string filenameOutput = cv::tempfile(".exr");
+
+    std::vector<int> params;
+    params.push_back(IMWRITE_EXR_TYPE);
+    params.push_back(IMWRITE_EXR_TYPE_HALF);
+
+#ifndef GENERATE_DATA
+    const Mat img = cv::imread(filenameInput, IMREAD_UNCHANGED);
+#else
+    const Size sz(64, 32);
+    Mat img(sz, CV_32FC3, Scalar(0.5, 0.1, 1));
+    img(Rect(10, 5, sz.width - 30, sz.height - 20)).setTo(Scalar(1, 0, 0));
+    ASSERT_TRUE(cv::imwrite(filenameInput, img, params));
+#endif
+    ASSERT_FALSE(img.empty());
+    ASSERT_EQ(CV_32FC3, img.type());
+
+    ASSERT_TRUE(cv::imwrite(filenameOutput, img, params));
+    const Mat img2 = cv::imread(filenameOutput, IMREAD_UNCHANGED);
+    ASSERT_EQ(img2.type(), img.type());
+    ASSERT_EQ(img2.size(), img.size());
+    EXPECT_LE(cvtest::norm(img, img2, NORM_INF | NORM_RELATIVE), 1e-3);
+    EXPECT_EQ(0, remove(filenameOutput.c_str()));
+}
+
+
+}} // namespace

modules/imgcodecs/test/test_grfmt.cpp

@@ -352,3 +352,7 @@ TEST(Imgcodecs, write_parameter_type)
 }
 
 }} // namespace
+
+#ifdef HAVE_OPENEXR
+#include "test_exr.impl.hpp"
+#endif