opencv/modules/imgproc/test/test_cornersubpix.cpp

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#include "test_precomp.hpp"

namespace opencv_test { namespace {

TEST(Imgproc_CornerSubPix, out_of_image_corners)
{
    const uint8_t image_pixels[] = {
        0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 0,
        0, 0, 0, 0, 0, 0, 1,
        0, 0, 0, 0, 0, 0, 2,
        0, 0, 0, 0, 0, 0, 3};

    cv::Mat image(cv::Size(7, 7), CV_8UC1, (void*)image_pixels, cv::Mat::AUTO_STEP);
    std::vector<cv::Point2f> corners = {cv::Point2f(5.25, 6.5)};
    cv::Size win(1, 1);
    cv::Size zeroZone(-1, -1);
    cv::TermCriteria criteria;
    cv::cornerSubPix(image, corners, win, zeroZone, criteria);

    ASSERT_EQ(corners.size(), 1u);
    ASSERT_TRUE(Rect(0, 0, image.cols, image.rows).contains(corners.front()));
}

}} // namespace