opencv/modules/ocl/test/test_warp.cpp

/*M///////////////////////////////////////////////////////////////////////////////////////
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// @Authors
//    Niko Li, newlife20080214@gmail.com
//    Jia Haipeng, jiahaipeng95@gmail.com
//    Shengen Yan, yanshengen@gmail.com
//    Jiang Liyuan, lyuan001.good@163.com
//    Rock Li, Rock.Li@amd.com
//    Wu Zailong, bullet@yeah.net
//    Xu Pang, pangxu010@163.com
//    Sen Liu, swjtuls1987@126.com
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#include "test_precomp.hpp"

#ifdef HAVE_OPENCL

using namespace cv;
using namespace testing;
using namespace std;

static MatType noType = -1;

/////////////////////////////////////////////////////////////////////////////////////////////////
// warpAffine  & warpPerspective

PARAM_TEST_CASE(WarpTestBase, MatType, Interpolation, bool, bool)
{
    int type, interpolation;
    Size dsize;
    bool useRoi, mapInverse;

    Mat src, dst_whole, src_roi, dst_roi;
    ocl::oclMat gsrc_whole, gsrc_roi, gdst_whole, gdst_roi;

    virtual void SetUp()
    {
        type = GET_PARAM(0);
        interpolation = GET_PARAM(1);
        mapInverse = GET_PARAM(2);
        useRoi = GET_PARAM(3);

        if (mapInverse)
            interpolation |= WARP_INVERSE_MAP;
    }

    void random_roi()
    {
        dsize = randomSize(1, MAX_VALUE);

        Size roiSize = randomSize(1, MAX_VALUE);
        Border srcBorder = randomBorder(0, useRoi ? MAX_VALUE : 0);
        randomSubMat(src, src_roi, roiSize, srcBorder, type, -MAX_VALUE, MAX_VALUE);

        Border dstBorder = randomBorder(0, useRoi ? MAX_VALUE : 0);
        randomSubMat(dst_whole, dst_roi, dsize, dstBorder, type, -MAX_VALUE, MAX_VALUE);

        generateOclMat(gsrc_whole, gsrc_roi, src, roiSize, srcBorder);
        generateOclMat(gdst_whole, gdst_roi, dst_whole, dsize, dstBorder);
    }

    void Near(double threshold = 0.0)
    {
        Mat whole, roi;
        gdst_whole.download(whole);
        gdst_roi.download(roi);

        EXPECT_MAT_NEAR(dst_whole, whole, threshold);
        EXPECT_MAT_NEAR(dst_roi, roi, threshold);
    }
};

/////warpAffine

typedef WarpTestBase WarpAffine;

OCL_TEST_P(WarpAffine, Mat)
{
    for (int j = 0; j < LOOP_TIMES; j++)
    {
        random_roi();

        Mat M = getRotationMatrix2D(Point2f(src_roi.cols / 2.0f, src_roi.rows / 2.0f),
            rng.uniform(-180.f, 180.f), rng.uniform(0.4f, 2.0f));

        warpAffine(src_roi, dst_roi, M, dsize, interpolation);
        ocl::warpAffine(gsrc_roi, gdst_roi, M, dsize, interpolation);

        Near(1.0);
    }
}

// warpPerspective

typedef WarpTestBase WarpPerspective;

OCL_TEST_P(WarpPerspective, Mat)
{
    for (int j = 0; j < LOOP_TIMES; j++)
    {
        random_roi();

        float cols = static_cast<float>(src_roi.cols), rows = static_cast<float>(src_roi.rows);
        float cols2 = cols / 2.0f, rows2 = rows / 2.0f;
        Point2f sp[] = { Point2f(0.0f, 0.0f), Point2f(cols, 0.0f), Point2f(0.0f, rows), Point2f(cols, rows) };
        Point2f dp[] = { Point2f(rng.uniform(0.0f, cols2), rng.uniform(0.0f, rows2)),
            Point2f(rng.uniform(cols2, cols), rng.uniform(0.0f, rows2)),
            Point2f(rng.uniform(0.0f, cols2), rng.uniform(rows2, rows)),
            Point2f(rng.uniform(cols2, cols), rng.uniform(rows2, rows)) };
        Mat M = getPerspectiveTransform(sp, dp);

        warpPerspective(src_roi, dst_roi, M, dsize, interpolation);
        ocl::warpPerspective(gsrc_roi, gdst_roi, M, dsize, interpolation);

        Near(1.0);
    }
}

// buildWarpPerspectiveMaps

PARAM_TEST_CASE(BuildWarpPerspectiveMaps, bool, bool)
{
    bool useRoi, mapInverse;
    Size dsize;

    Mat xmap_whole, ymap_whole, xmap_roi, ymap_roi;
    ocl::oclMat gxmap_whole, gymap_whole, gxmap_roi, gymap_roi;

    void SetUp()
    {
        mapInverse = GET_PARAM(0);
        useRoi = GET_PARAM(1);
    }

    void random_roi()
    {
        dsize = randomSize(1, MAX_VALUE);

        Border xmapBorder = randomBorder(0, useRoi ? MAX_VALUE : 0);
        randomSubMat(xmap_whole, xmap_roi, dsize, xmapBorder, CV_32FC1, -MAX_VALUE, MAX_VALUE);

        Border ymapBorder = randomBorder(0, useRoi ? MAX_VALUE : 0);
        randomSubMat(ymap_whole, ymap_roi, dsize, ymapBorder, CV_32FC1, -MAX_VALUE, MAX_VALUE);

        generateOclMat(gxmap_whole, gxmap_roi, xmap_whole, dsize, xmapBorder);
        generateOclMat(gymap_whole, gymap_roi, ymap_whole, dsize, ymapBorder);
    }

    void Near(double threshold = 0.0)
    {
        Mat whole, roi;
        gxmap_whole.download(whole);
        gxmap_roi.download(roi);

        EXPECT_MAT_NEAR(xmap_whole, whole, threshold);
        EXPECT_MAT_NEAR(xmap_roi, roi, threshold);
    }

    void Near1(double threshold = 0.0)
    {
        Mat whole, roi;
        gymap_whole.download(whole);
        gymap_roi.download(roi);

        EXPECT_MAT_NEAR(ymap_whole, whole, threshold);
        EXPECT_MAT_NEAR(ymap_roi, roi, threshold);
    }
};

static void buildWarpPerspectiveMaps(const Mat &M, bool inverse, Size dsize, Mat &xmap, Mat &ymap)
{
    CV_Assert(M.rows == 3 && M.cols == 3);
    CV_Assert(dsize.area() > 0);

    xmap.create(dsize, CV_32FC1);
    ymap.create(dsize, CV_32FC1);

    float coeffs[3 * 3];
    Mat coeffsMat(3, 3, CV_32F, (void *)coeffs);

    if (inverse)
        M.convertTo(coeffsMat, coeffsMat.type());
    else
    {
        cv::Mat iM;
        invert(M, iM);
        iM.convertTo(coeffsMat, coeffsMat.type());
    }

    for (int y = 0; y < dsize.height; ++y)
    {
        float * const xmap_ptr = xmap.ptr<float>(y);
        float * const ymap_ptr = ymap.ptr<float>(y);

        for (int x = 0; x < dsize.width; ++x)
        {
            float coeff = 1.0f / (x * coeffs[6] + y * coeffs[7] + coeffs[8]);
            xmap_ptr[x] = (x * coeffs[0] + y * coeffs[1] + coeffs[2]) * coeff;
            ymap_ptr[x] = (x * coeffs[3] + y * coeffs[4] + coeffs[5]) * coeff;
        }
    }
}

OCL_TEST_P(BuildWarpPerspectiveMaps, Mat)
{
    for (int j = 0; j < LOOP_TIMES; j++)
    {
        random_roi();

        float cols = static_cast<float>(MAX_VALUE), rows = static_cast<float>(MAX_VALUE);
        float cols2 = cols / 2.0f, rows2 = rows / 2.0f;
        Point2f sp[] = { Point2f(0.0f, 0.0f), Point2f(cols, 0.0f), Point2f(0.0f, rows), Point2f(cols, rows) };
        Point2f dp[] = { Point2f(rng.uniform(0.0f, cols2), rng.uniform(0.0f, rows2)),
            Point2f(rng.uniform(cols2, cols), rng.uniform(0.0f, rows2)),
            Point2f(rng.uniform(0.0f, cols2), rng.uniform(rows2, rows)),
            Point2f(rng.uniform(cols2, cols), rng.uniform(rows2, rows)) };
        Mat M = getPerspectiveTransform(sp, dp);

        buildWarpPerspectiveMaps(M, mapInverse, dsize, xmap_roi, ymap_roi);
        ocl::buildWarpPerspectiveMaps(M, mapInverse, dsize, gxmap_roi, gymap_roi);

        Near(5e-3);
        Near1(5e-3);
    }
}

/////////////////////////////////////////////////////////////////////////////////////////////////
// remap

PARAM_TEST_CASE(Remap, MatDepth, Channels, pair<MatType, MatType>, Border, bool)
{
    int srcType, map1Type, map2Type;
    int borderType;
    bool useRoi;

    Scalar val;

    Mat src, src_roi;
    Mat dst, dst_roi;
    Mat map1, map1_roi;
    Mat map2, map2_roi;

    // ocl mat with roi
    ocl::oclMat gsrc, gsrc_roi;
    ocl::oclMat gdst, gdst_roi;
    ocl::oclMat gmap1, gmap1_roi;
    ocl::oclMat gmap2, gmap2_roi;

    virtual void SetUp()
    {
        srcType = CV_MAKE_TYPE(GET_PARAM(0), GET_PARAM(1));
        map1Type = GET_PARAM(2).first;
        map2Type = GET_PARAM(2).second;
        borderType = GET_PARAM(3);
        useRoi = GET_PARAM(4);
    }

    void random_roi()
    {
        val = randomScalar(-MAX_VALUE, MAX_VALUE);
        Size srcROISize = randomSize(1, MAX_VALUE);
        Size dstROISize = randomSize(1, MAX_VALUE);

        Border srcBorder = randomBorder(0, useRoi ? MAX_VALUE : 0);
        randomSubMat(src, src_roi, srcROISize, srcBorder, srcType, 5, 256);

        Border dstBorder = randomBorder(0, useRoi ? MAX_VALUE : 0);
        randomSubMat(dst, dst_roi, dstROISize, dstBorder, srcType, -MAX_VALUE, MAX_VALUE);

        int mapMaxValue = MAX_VALUE << 2;
        Border map1Border = randomBorder(0, useRoi ? MAX_VALUE : 0);
        randomSubMat(map1, map1_roi, dstROISize, map1Border, map1Type, -mapMaxValue, mapMaxValue);

        Border map2Border = randomBorder(0, useRoi ? MAX_VALUE : 0);
        if (map2Type != noType)
        {
            int mapMinValue = -mapMaxValue;
            if (map2Type == CV_16UC1 || map2Type == CV_16SC1)
                mapMinValue = 0, mapMaxValue = INTER_TAB_SIZE2;
            randomSubMat(map2, map2_roi, dstROISize, map2Border, map2Type, mapMinValue, mapMaxValue);
        }

        generateOclMat(gsrc, gsrc_roi, src, srcROISize, srcBorder);
        generateOclMat(gdst, gdst_roi, dst, dstROISize, dstBorder);
        generateOclMat(gmap1, gmap1_roi, map1, dstROISize, map1Border);
        if (noType != map2Type)
            generateOclMat(gmap2, gmap2_roi, map2, dstROISize, map2Border);
    }

    void Near(double threshold = 0.0)
    {
        Mat whole, roi;
        gdst.download(whole);
        gdst_roi.download(roi);

        EXPECT_MAT_NEAR(dst, whole, threshold);
        EXPECT_MAT_NEAR(dst_roi, roi, threshold);
    }
};

typedef Remap Remap_INTER_NEAREST;

OCL_TEST_P(Remap_INTER_NEAREST, Mat)
{
    for (int j = 0; j < LOOP_TIMES; j++)
    {
        random_roi();

        remap(src_roi, dst_roi, map1_roi, map2_roi, INTER_NEAREST, borderType, val);
        ocl::remap(gsrc_roi, gdst_roi, gmap1_roi, gmap2_roi, INTER_NEAREST, borderType, val);

        Near(1.0);
    }
}

typedef Remap Remap_INTER_LINEAR;

OCL_TEST_P(Remap_INTER_LINEAR, Mat)
{
    for (int j = 0; j < LOOP_TIMES; j++)
    {
        random_roi();

        cv::remap(src_roi, dst_roi, map1_roi, map2_roi, INTER_LINEAR, borderType, val);
        ocl::remap(gsrc_roi, gdst_roi, gmap1_roi, gmap2_roi, INTER_LINEAR, borderType, val);

        Near(2.0);
    }
}

/////////////////////////////////////////////////////////////////////////////////////////////////
// resize

PARAM_TEST_CASE(Resize, MatType, double, double, Interpolation, bool)
{
    int type, interpolation;
    double fx, fy;
    bool useRoi;

    Mat src, dst_whole, src_roi, dst_roi;
    ocl::oclMat gsrc_whole, gsrc_roi, gdst_whole, gdst_roi;

    virtual void SetUp()
    {
        type = GET_PARAM(0);
        fx = GET_PARAM(1);
        fy = GET_PARAM(2);
        interpolation = GET_PARAM(3);
        useRoi = GET_PARAM(4);
    }

    void random_roi()
    {
        CV_Assert(fx > 0 && fy > 0);

        Size srcRoiSize = randomSize(1, MAX_VALUE), dstRoiSize;
        dstRoiSize.width = cvRound(srcRoiSize.width * fx);
        dstRoiSize.height = cvRound(srcRoiSize.height * fy);

        if (dstRoiSize.area() == 0)
            return random_roi();

        Border srcBorder = randomBorder(0, useRoi ? MAX_VALUE : 0);
        randomSubMat(src, src_roi, srcRoiSize, srcBorder, type, -MAX_VALUE, MAX_VALUE);

        Border dstBorder = randomBorder(0, useRoi ? MAX_VALUE : 0);
        randomSubMat(dst_whole, dst_roi, dstRoiSize, dstBorder, type, -MAX_VALUE, MAX_VALUE);

        generateOclMat(gsrc_whole, gsrc_roi, src, srcRoiSize, srcBorder);
        generateOclMat(gdst_whole, gdst_roi, dst_whole, dstRoiSize, dstBorder);
    }

    void Near(double threshold = 0.0)
    {
        Mat whole, roi;
        gdst_whole.download(whole);
        gdst_roi.download(roi);

        EXPECT_MAT_NEAR(dst_whole, whole, threshold);
        EXPECT_MAT_NEAR(dst_roi, roi, threshold);
    }
};

OCL_TEST_P(Resize, Mat)
{
    for (int j = 0; j < LOOP_TIMES; j++)
    {
        random_roi();

        cv::resize(src_roi, dst_roi, Size(), fx, fy, interpolation);
        ocl::resize(gsrc_roi, gdst_roi, Size(), fx, fy, interpolation);

        Near(1.0);
    }
}

/////////////////////////////////////////////////////////////////////////////////////

INSTANTIATE_TEST_CASE_P(ImgprocWarp, WarpAffine, Combine(
                            Values(CV_8UC1, CV_8UC3, CV_8UC4, CV_32FC1, CV_32FC3, CV_32FC4),
                            Values((Interpolation)INTER_NEAREST, (Interpolation)INTER_LINEAR, (Interpolation)INTER_CUBIC),
                            Bool(),
                            Bool()));

INSTANTIATE_TEST_CASE_P(ImgprocWarp, WarpPerspective, Combine(
                            Values(CV_8UC1, CV_8UC3, CV_8UC4, CV_32FC1, CV_32FC3, CV_32FC4),
                            Values((Interpolation)INTER_NEAREST, (Interpolation)INTER_LINEAR, (Interpolation)INTER_CUBIC),
                            Bool(),
                            Bool()));

INSTANTIATE_TEST_CASE_P(ImgprocWarp, BuildWarpPerspectiveMaps, Combine(Bool(), Bool()));

INSTANTIATE_TEST_CASE_P(ImgprocWarp, Remap_INTER_LINEAR, Combine(
                            Values(CV_8U, CV_16U, CV_16S, CV_32F, CV_64F),
                            Values(1, 2, 3, 4),
                            Values(pair<MatType, MatType>((MatType)CV_32FC1, (MatType)CV_32FC1),
                                   pair<MatType, MatType>((MatType)CV_16SC2, (MatType)CV_16UC1),
                                   pair<MatType, MatType>((MatType)CV_32FC2, noType)),
                            Values((Border)BORDER_CONSTANT,
                                   (Border)BORDER_REPLICATE,
                                   (Border)BORDER_WRAP,
                                   (Border)BORDER_REFLECT,
                                   (Border)BORDER_REFLECT_101),
                            Bool()));

INSTANTIATE_TEST_CASE_P(ImgprocWarp, Remap_INTER_NEAREST, Combine(
                            Values(CV_8U, CV_16U, CV_16S, CV_32F, CV_64F),
                            Values(1, 2, 3, 4),
                            Values(pair<MatType, MatType>((MatType)CV_32FC1, (MatType)CV_32FC1),
                                   pair<MatType, MatType>((MatType)CV_32FC2, noType),
                                   pair<MatType, MatType>((MatType)CV_16SC2, (MatType)CV_16UC1),
                                   pair<MatType, MatType>((MatType)CV_16SC2, noType)),
                            Values((Border)BORDER_CONSTANT,
                                   (Border)BORDER_REPLICATE,
                                   (Border)BORDER_WRAP,
                                   (Border)BORDER_REFLECT,
                                   (Border)BORDER_REFLECT_101),
                            Bool()));

INSTANTIATE_TEST_CASE_P(ImgprocWarpResize, Resize, Combine(
                            Values((MatType)CV_8UC1, CV_8UC3, CV_8UC4, CV_32FC1, CV_32FC3, CV_32FC4),
                            Values(0.7, 0.4, 2.0),
                            Values(0.3, 0.6, 2.0),
                            Values((Interpolation)INTER_NEAREST, (Interpolation)INTER_LINEAR),
                            Bool()));

INSTANTIATE_TEST_CASE_P(ImgprocWarpResizeArea, Resize, Combine(
                            Values((MatType)CV_8UC1, CV_8UC3, CV_8UC4, CV_32FC1, CV_32FC3, CV_32FC4),
                            Values(0.7, 0.4, 0.5),
                            Values(0.3, 0.6, 0.5),
                            Values((Interpolation)INTER_AREA),
                            Bool()));

#endif // HAVE_OPENCL