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#include "test_precomp.hpp"

#if defined(HAVE_CUDA) && defined(OPENCV_ENABLE_NONFREE)

namespace opencv_test { namespace {

/////////////////////////////////////////////////////////////////////////////////////////////////
// SURF

#ifdef HAVE_OPENCV_CUDAARITHM

namespace
{
    IMPLEMENT_PARAM_CLASS(SURF_HessianThreshold, double)
    IMPLEMENT_PARAM_CLASS(SURF_Octaves, int)
    IMPLEMENT_PARAM_CLASS(SURF_OctaveLayers, int)
    IMPLEMENT_PARAM_CLASS(SURF_Extended, bool)
    IMPLEMENT_PARAM_CLASS(SURF_Upright, bool)
}

PARAM_TEST_CASE(CUDA_SURF, SURF_HessianThreshold, SURF_Octaves, SURF_OctaveLayers, SURF_Extended, SURF_Upright)
{
    double hessianThreshold;
    int nOctaves;
    int nOctaveLayers;
    bool extended;
    bool upright;

    virtual void SetUp()
    {
        hessianThreshold = GET_PARAM(0);
        nOctaves = GET_PARAM(1);
        nOctaveLayers = GET_PARAM(2);
        extended = GET_PARAM(3);
        upright = GET_PARAM(4);
    }
};

CUDA_TEST_P(CUDA_SURF, Detector)
{
    cv::Mat image = readImage("../gpu/features2d/aloe.png", cv::IMREAD_GRAYSCALE);
    ASSERT_FALSE(image.empty());

    cv::cuda::SURF_CUDA surf;
    surf.hessianThreshold = hessianThreshold;
    surf.nOctaves = nOctaves;
    surf.nOctaveLayers = nOctaveLayers;
    surf.extended = extended;
    surf.upright = upright;
    surf.keypointsRatio = 0.05f;

    std::vector<cv::KeyPoint> keypoints;
    surf(loadMat(image), cv::cuda::GpuMat(), keypoints);

    cv::Ptr<cv::Feature2D> surf_gold = cv::xfeatures2d::SURF::create(hessianThreshold, nOctaves, nOctaveLayers, extended, upright);

    std::vector<cv::KeyPoint> keypoints_gold;
    surf_gold->detect(image, keypoints_gold);

    ASSERT_EQ(keypoints_gold.size(), keypoints.size());
    int matchedCount = getMatchedPointsCount(keypoints_gold, keypoints);
    double matchedRatio = static_cast<double>(matchedCount) / keypoints_gold.size();

    EXPECT_GT(matchedRatio, 0.95);
}

CUDA_TEST_P(CUDA_SURF, Detector_Masked)
{
    cv::Mat image = readImage("../gpu/features2d/aloe.png", cv::IMREAD_GRAYSCALE);
    ASSERT_FALSE(image.empty());

    cv::Mat mask(image.size(), CV_8UC1, cv::Scalar::all(1));
    mask(cv::Range(0, image.rows / 2), cv::Range(0, image.cols / 2)).setTo(cv::Scalar::all(0));

    cv::cuda::SURF_CUDA surf;
    surf.hessianThreshold = hessianThreshold;
    surf.nOctaves = nOctaves;
    surf.nOctaveLayers = nOctaveLayers;
    surf.extended = extended;
    surf.upright = upright;
    surf.keypointsRatio = 0.05f;

    std::vector<cv::KeyPoint> keypoints;
    surf(loadMat(image), loadMat(mask), keypoints);

    cv::Ptr<cv::Feature2D> surf_gold = cv::xfeatures2d::SURF::create(hessianThreshold, nOctaves, nOctaveLayers, extended, upright);

    std::vector<cv::KeyPoint> keypoints_gold;
    surf_gold->detect(image, keypoints_gold, mask);

    ASSERT_EQ(keypoints_gold.size(), keypoints.size());
    int matchedCount = getMatchedPointsCount(keypoints_gold, keypoints);
    double matchedRatio = static_cast<double>(matchedCount) / keypoints_gold.size();

    EXPECT_GT(matchedRatio, 0.95);
}

CUDA_TEST_P(CUDA_SURF, Descriptor)
{
    cv::Mat image = readImage("../gpu/features2d/aloe.png", cv::IMREAD_GRAYSCALE);
    ASSERT_FALSE(image.empty());

    cv::cuda::SURF_CUDA surf;
    surf.hessianThreshold = hessianThreshold;
    surf.nOctaves = nOctaves;
    surf.nOctaveLayers = nOctaveLayers;
    surf.extended = extended;
    surf.upright = upright;
    surf.keypointsRatio = 0.05f;

    cv::Ptr<cv::Feature2D> surf_gold = cv::xfeatures2d::SURF::create(hessianThreshold, nOctaves, nOctaveLayers, extended, upright);

    std::vector<cv::KeyPoint> keypoints;
    surf_gold->detect(image, keypoints);

    cv::cuda::GpuMat descriptors;
    surf(loadMat(image), cv::cuda::GpuMat(), keypoints, descriptors, true);

    cv::Mat descriptors_gold;
    surf_gold->compute(image, keypoints, descriptors_gold);

    cv::BFMatcher matcher(surf.defaultNorm());
    std::vector<cv::DMatch> matches;
    matcher.match(descriptors_gold, cv::Mat(descriptors), matches);

    int matchedCount = getMatchedPointsCount(keypoints, keypoints, matches);
    double matchedRatio = static_cast<double>(matchedCount) / keypoints.size();

    EXPECT_GT(matchedRatio, 0.6);
}

#if defined (__x86_64__) || defined (_M_X64)
testing::internal::ValueArray3<SURF_HessianThreshold, SURF_HessianThreshold, SURF_HessianThreshold> thresholdValues =
    testing::Values(
            SURF_HessianThreshold(100.0),
            SURF_HessianThreshold(500.0),
            SURF_HessianThreshold(1000.0));
#else
// hessian computation is not bit-exact and lower threshold causes different count of detection
testing::internal::ValueArray2<SURF_HessianThreshold, SURF_HessianThreshold> thresholdValues =
    testing::Values(
            SURF_HessianThreshold(813.0),
            SURF_HessianThreshold(1000.0));
#endif

INSTANTIATE_TEST_CASE_P(CUDA_Features2D, CUDA_SURF, testing::Combine(
    thresholdValues,
    testing::Values(SURF_Octaves(3), SURF_Octaves(4)),
    testing::Values(SURF_OctaveLayers(2), SURF_OctaveLayers(3)),
    testing::Values(SURF_Extended(false), SURF_Extended(true)),
    testing::Values(SURF_Upright(false), SURF_Upright(true))));

#endif // HAVE_OPENCV_CUDAARITHM

}} // namespace
#endif // HAVE_CUDA && OPENCV_ENABLE_NONFREE
