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// This file is part of OpenCV project.
// It is subject to the license terms in the LICENSE file found in the top-level directory
// of this distribution and at http://opencv.org/license.html.
#include "test_precomp.hpp"
namespace opencv_test { namespace {
TEST(ximgproc_niBlackThreshold, sauvola)
{
Mat src = (Mat_<uchar>(3, 3) << 1, 1, 1, 2, 2, 2, 3, 3, 3);
Mat dst;
cv::ximgproc::niBlackThreshold(src, dst, 255, THRESH_BINARY, 3, 1, BINARIZATION_SAUVOLA, 1);
EXPECT_EQ(CV_8U, dst.type());
EXPECT_EQ(3, dst.rows);
EXPECT_EQ(3, dst.cols);
EXPECT_EQ(0, dst.at<uchar>(0, 0));
EXPECT_EQ(0, dst.at<uchar>(0, 1));
EXPECT_EQ(0, dst.at<uchar>(0, 2));
EXPECT_EQ(0, dst.at<uchar>(1, 0));
EXPECT_EQ(0, dst.at<uchar>(1, 1));
EXPECT_EQ(0, dst.at<uchar>(1, 2));
EXPECT_EQ(255, dst.at<uchar>(2, 0));
EXPECT_EQ(255, dst.at<uchar>(2, 1));
EXPECT_EQ(255, dst.at<uchar>(2, 2));
}
}} // namespace
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