opencv/modules/core/perf/perf_convertTo.cpp

#include "perf_precomp.hpp"

using namespace std;
using namespace cv;
using namespace perf;
using std::tr1::make_tuple;
using std::tr1::get;

typedef std::tr1::tuple<Size, MatType, MatType, int, double> Size_DepthSrc_DepthDst_Channels_alpha_t;
typedef perf::TestBaseWithParam<Size_DepthSrc_DepthDst_Channels_alpha_t> Size_DepthSrc_DepthDst_Channels_alpha;

PERF_TEST_P( Size_DepthSrc_DepthDst_Channels_alpha, convertTo,
             testing::Combine
             (
                 testing::Values(szVGA, sz1080p),
                 testing::Values(CV_8U, CV_8S, CV_16U, CV_16S, CV_32S, CV_32F, CV_64F),
                 testing::Values(CV_8U, CV_8S, CV_16U, CV_16S, CV_32S, CV_32F, CV_64F),
                 testing::Values(1, 4),
                 testing::Values(1.0, 1./255)
             )
           )
{
    Size sz = get<0>(GetParam());
    int depthSrc = get<1>(GetParam());
    int depthDst = get<2>(GetParam());
    int channels = get<3>(GetParam());
    double alpha = get<4>(GetParam());

    Mat src(sz, CV_MAKETYPE(depthSrc, channels));  
    randu(src, 0, 255);
    Mat dst(sz, CV_MAKETYPE(depthDst, channels));

    TEST_CYCLE() src.convertTo(dst, depthDst, alpha);

    SANITY_CHECK(dst, alpha == 1.0 ? 1e-12 : 1e-7);
}