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#include "test_precomp.hpp"
#include "opencv2/photo.hpp"
#include <string>
using namespace cv;
using namespace std;
static const double numerical_precision = 10.;
TEST(Photo_Decolor, regression)
{
string folder = string(cvtest::TS::ptr()->get_data_path()) + "decolor/";
string original_path = folder + "color_image_1.png";
Mat original = imread(original_path, IMREAD_COLOR);
ASSERT_FALSE(original.empty()) << "Could not load input image " << original_path;
ASSERT_FALSE(original.channels()!=3) << "Load color input image " << original_path;
Mat grayscale, color_boost;
decolor(original, grayscale, color_boost);
Mat reference_grayscale = imread(folder + "grayscale_reference.png", 0 /* == grayscale image*/);
double error_grayscale = cvtest::norm(reference_grayscale, grayscale, NORM_L1);
EXPECT_LE(error_grayscale, numerical_precision);
Mat reference_boost = imread(folder + "boost_reference.png");
double error_boost = cvtest::norm(reference_boost, color_boost, NORM_L1);
EXPECT_LE(error_boost, numerical_precision);
}