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#include "test_precomp.hpp"

#include "opencv2/photo/gpu.hpp"
#include "opencv2/ts/gpu_test.hpp"

#include "opencv2/opencv_modules.hpp"
#include "cvconfig.h"

#if defined (HAVE_CUDA) && defined(HAVE_OPENCV_GPUARITHM) && defined(HAVE_OPENCV_GPUIMGPROC)

using namespace cvtest;

////////////////////////////////////////////////////////
// Brute Force Non local means

TEST(GPU_BruteForceNonLocalMeans, Regression)
{
    using cv::cuda::GpuMat;

    cv::Mat bgr  = readImage("../gpu/denoising/lena_noised_gaussian_sigma=20_multi_0.png", cv::IMREAD_COLOR);
    ASSERT_FALSE(bgr.empty());

    cv::Mat gray;
    cv::cvtColor(bgr, gray, cv::COLOR_BGR2GRAY);

    GpuMat dbgr, dgray;
    cv::cuda::nonLocalMeans(GpuMat(bgr),  dbgr, 20);
    cv::cuda::nonLocalMeans(GpuMat(gray), dgray, 20);

#if 0
    dumpImage("../gpu/denoising/nlm_denoised_lena_bgr.png", cv::Mat(dbgr));
    dumpImage("../gpu/denoising/nlm_denoised_lena_gray.png", cv::Mat(dgray));
#endif

    cv::Mat bgr_gold  = readImage("../gpu/denoising/nlm_denoised_lena_bgr.png", cv::IMREAD_COLOR);
    cv::Mat gray_gold  = readImage("../gpu/denoising/nlm_denoised_lena_gray.png", cv::IMREAD_GRAYSCALE);
    ASSERT_FALSE(bgr_gold.empty() || gray_gold.empty());

    EXPECT_MAT_NEAR(bgr_gold, dbgr, 1e-4);
    EXPECT_MAT_NEAR(gray_gold, dgray, 1e-4);
}

////////////////////////////////////////////////////////
// Fast Force Non local means

TEST(GPU_FastNonLocalMeans, Regression)
{
    using cv::cuda::GpuMat;

    cv::Mat bgr  = readImage("../gpu/denoising/lena_noised_gaussian_sigma=20_multi_0.png", cv::IMREAD_COLOR);
    ASSERT_FALSE(bgr.empty());

    cv::Mat gray;
    cv::cvtColor(bgr, gray, cv::COLOR_BGR2GRAY);

    GpuMat dbgr, dgray;
    cv::cuda::FastNonLocalMeansDenoising fnlmd;

    fnlmd.simpleMethod(GpuMat(gray),  dgray, 20);
    fnlmd.labMethod(GpuMat(bgr),  dbgr, 20, 10);

#if 0
    dumpImage("../gpu/denoising/fnlm_denoised_lena_bgr.png", cv::Mat(dbgr));
    dumpImage("../gpu/denoising/fnlm_denoised_lena_gray.png", cv::Mat(dgray));
#endif

    cv::Mat bgr_gold  = readImage("../gpu/denoising/fnlm_denoised_lena_bgr.png", cv::IMREAD_COLOR);
    cv::Mat gray_gold  = readImage("../gpu/denoising/fnlm_denoised_lena_gray.png", cv::IMREAD_GRAYSCALE);
    ASSERT_FALSE(bgr_gold.empty() || gray_gold.empty());

    EXPECT_MAT_NEAR(bgr_gold, dbgr, 1);
    EXPECT_MAT_NEAR(gray_gold, dgray, 1);
}

#endif // HAVE_CUDA