mirror of
https://github.com/opencv/opencv_contrib.git
synced 2025-10-18 17:24:28 +08:00
d131e7a991
Misc thinning fixes. #3743 - edges could be modified - 2 sets of iterations were always done even if the first set did not return any change - countNonZero is slow compared to hasNonZero ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [x] The PR is proposed to the proper branch - [x] There is a reference to the original bug report and related work - [x] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name.
58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
// 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 {
|
|
|
|
static int createTestImage(Mat1b& src)
|
|
{
|
|
src = Mat1b::zeros(Size(256, 256));
|
|
// Create a corner point that should not be affected.
|
|
src(0, 0) = 255;
|
|
|
|
for (int x = 50; x < src.cols - 50; x += 50)
|
|
{
|
|
cv::circle(src, Point(x, x/2), 30 + x/2, Scalar(255), 5);
|
|
}
|
|
int src_pixels = countNonZero(src);
|
|
EXPECT_GT(src_pixels, 0);
|
|
return src_pixels;
|
|
}
|
|
|
|
TEST(ximgproc_Thinning, simple_ZHANGSUEN)
|
|
{
|
|
Mat1b src;
|
|
int src_pixels = createTestImage(src);
|
|
|
|
Mat1b dst;
|
|
thinning(src, dst, THINNING_ZHANGSUEN);
|
|
int dst_pixels = countNonZero(dst);
|
|
EXPECT_LE(dst_pixels, src_pixels);
|
|
EXPECT_EQ(dst(0, 0), 255);
|
|
|
|
#if 0
|
|
imshow("src", src); imshow("dst", dst); waitKey();
|
|
#endif
|
|
}
|
|
|
|
TEST(ximgproc_Thinning, simple_GUOHALL)
|
|
{
|
|
Mat1b src;
|
|
int src_pixels = createTestImage(src);
|
|
|
|
Mat1b dst;
|
|
thinning(src, dst, THINNING_GUOHALL);
|
|
int dst_pixels = countNonZero(dst);
|
|
EXPECT_LE(dst_pixels, src_pixels);
|
|
EXPECT_EQ(dst(0, 0), 255);
|
|
|
|
#if 0
|
|
imshow("src", src); imshow("dst", dst); waitKey();
|
|
#endif
|
|
}
|
|
|
|
|
|
}} // namespace
|