opencv/modules/ocl/test/test_canny.cpp

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//    Peng Xiao, pengxiao@multicorewareinc.com
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#include "precomp.hpp"
#ifdef HAVE_OPENCL

////////////////////////////////////////////////////////
// Canny
extern std::string workdir;
IMPLEMENT_PARAM_CLASS(AppertureSize, int);
IMPLEMENT_PARAM_CLASS(L2gradient, bool);

PARAM_TEST_CASE(Canny, AppertureSize, L2gradient)
{
    int apperture_size;
    bool useL2gradient;

    cv::Mat edges_gold;
    virtual void SetUp()
    {
        apperture_size = GET_PARAM(0);
        useL2gradient = GET_PARAM(1);
    }
};

TEST_P(Canny, Accuracy)
{
    cv::Mat img = readImage(workdir + "fruits.jpg", cv::IMREAD_GRAYSCALE);
    ASSERT_FALSE(img.empty());

    double low_thresh = 50.0;
    double high_thresh = 100.0;

    cv::ocl::oclMat ocl_img = cv::ocl::oclMat(img);

    cv::ocl::oclMat edges;
    cv::ocl::Canny(ocl_img, edges, low_thresh, high_thresh, apperture_size, useL2gradient);

    cv::Mat edges_gold;
    cv::Canny(img, edges_gold, low_thresh, high_thresh, apperture_size, useL2gradient);

    EXPECT_MAT_SIMILAR(edges_gold, edges, 1e-2);
}

INSTANTIATE_TEST_CASE_P(OCL_ImgProc, Canny, testing::Combine(
                            testing::Values(AppertureSize(3), AppertureSize(5)),
                            testing::Values(L2gradient(false), L2gradient(true))));
#endif