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Author SHA1 Message Date
Martin 43112409ef Merge pull request #26974 from klosteraner:Fix-IntersectConvexConvex 
Issue 26972: Proper treatment of float values in intersectConvexConvex #26974

As outlined in https://github.com/opencv/opencv/issues/26972 the function `intersectConvexConvex()` may not work as expected in the corner case, where two polygons intersect at a corner. A concrete example is given that I added as unit test. The unit test would fail without the proposed bug fix. I recommend porting the fix to all versions.

Now concerning the fix: When digging into the implementation I found, that when the line intersections are computed, openCV currently does not apply floating point comparison syntax, but pretends that line end points are exact. Instead I replaced the formulation using the eps that is already used in another component of the function in line.277: `epx=1e-5`. IMO that is solid enough, definitely better than assuming an exact floating point comparison is possible.

As a follow up I would suggest to use a scalable eps, s.t. also cases with high floating point numbers would be less error prone. However that would need to be done in all relevant sub steps, not just the line intersection code. So for me outside the scope of this fix.



### 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
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake
 2025-06-28 22:06:42 +03:00
Alexander Smorkalov 5ee8919139 Merge pull request #27441 from KAVYANSHTYAGI:codex/find-feature-to-add-for-library 
Add Support for Diamond-Shaped Structuring Element in Morphological Operations
 2025-06-27 09:39:44 +03:00
Souriya Trinh ba70d1104f Check for empty vector to avoid throwing an exception in LineSegmentDetectorImpl::drawSegments() function. 2025-06-24 04:58:54 +02:00
Alexander Smorkalov 972e135479 Merge pull request #26703 from MaximSmolskiy:fix-matchTemplate-with-mask-crash 
Fix matchTemplate with mask crash
 2025-06-19 10:15:33 +03:00
Dmitry Kurtaev d750d43aa2 Merge pull request #27432 from dkurt:d.kurtaev/ipp_distTransform 
Correct IPP distanceTransform results with single thread #27432

### Pull Request Readiness Checklist

resolves #24082

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.
- [x] The feature is well documented and sample code can be built with the project CMake
 2025-06-11 17:37:18 +03:00
Kavyansh Tyagi 452882c007 Add diamond structuring element 2025-06-11 15:54:29 +05:30
Dmitry Kurtaev d6864cdd22 Merge pull request #27418 from dkurt:fix_valgrind_warnings 
Fix valgrind warnings in tests #27418

### Pull Request Readiness Checklist

https://pullrequest.opencv.org/buildbot/builders/4_x_valgrind-lin64-debug/builds/100131/steps/test_calib3d/logs/valgrind%20summary
https://pullrequest.opencv.org/buildbot/builders/4_x_valgrind-lin64-debug/builds/100131/steps/test_imgproc/logs/valgrind%20summary

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.
- [x] The feature is well documented and sample code can be built with the project CMake
 2025-06-09 09:23:04 +03:00
Alexander Smorkalov a2c381a82b Merge pull request #27398 from asmorkalov:as/relax_remap_relative 
Relax remap relative test to handle the case when HAL implements not all remap options
 2025-06-04 16:29:21 +03:00
s-trinh e258f2595e Merge pull request #26299 from s-trinh:feat/getClosestEllipsePoints_2 
Add getClosestEllipsePoints() function to get the closest point on an ellipse #26299

Following https://github.com/opencv/opencv/issues/26078, I was thinking that a function to get for a considered 2d point the corresponding closest point (or maybe directly the distance?) on an ellipse could be useful.
This would allow computing the fitting error with `fitEllipse()` for instance.

Code is based from:
- https://stackoverflow.com/questions/22959698/distance-from-given-point-to-given-ellipse/46007540#46007540
- https://blog.chatfield.io/simple-method-for-distance-to-ellipse/
- https://github.com/0xfaded/ellipse_demo

---

Demo code:

<details>
  <summary>code</summary>
 
```cpp
#include <iostream>
#include <opencv2/opencv.hpp>

namespace
{
void scaleApplyColormap(const cv::Mat &img_float, cv::Mat &img)
{
  cv::Mat img_scale = cv::Mat::zeros(img_float.size(), CV_8UC3);

  double min_val = 0, max_val = 0;
  cv::minMaxLoc(img_float, &min_val, &max_val);
  std::cout << "min_val=" << min_val << " ; max_val=" << max_val << std::endl;

  if (max_val - min_val > 1e-2) {
    float a = 255 / (max_val - min_val);
    float b = -a * min_val;

    cv::convertScaleAbs(img_float, img_scale, a, b);
    cv::applyColorMap(img_scale, img, cv::COLORMAP_TURBO);
  }
  else {
    std::cerr << "max_val - min_val <= 1e-2" << std::endl;
  }
}

cv::Mat drawEllipseDistanceMap(const cv::RotatedRect &ellipse_params)
{
  float bb_rect_w = ellipse_params.center.x + ellipse_params.size.width;
  float bb_rect_h = ellipse_params.center.y + ellipse_params.size.height;

  std::vector<cv::Point2f> points_list;
  points_list.resize(1);
  cv::Mat pointsf;
  cv::Mat closest_pts;
  cv::Mat dist_map = cv::Mat::zeros(bb_rect_h*1.5, bb_rect_w*1.5, CV_32F);
  for (int i = 0; i < dist_map.rows; i++) {
    for (int j = 0; j < dist_map.cols; j++) {
      points_list[0].x = j;
      points_list[0].y = i;
      cv::Mat(points_list).convertTo(pointsf, CV_32F);
      cv::getClosestEllipsePoints(ellipse_params, pointsf, closest_pts);
      dist_map.at<float>(i, j) = std::hypot(closest_pts.at<cv::Point2f>(0).x-j, closest_pts.at<cv::Point2f>(0).y-i);
    }
  }

  cv::Mat dist_map_8u;
  scaleApplyColormap(dist_map, dist_map_8u);
  return dist_map_8u;
}
}

int main()
{
  std::vector<cv::Point2f> points_list;

  // [1434, 308], [1434, 309], [1433, 310], [1427, 310], [1427, 312], [1426, 313], [1422, 313], [1422, 314],
  points_list.push_back(cv::Point2f(1434, 308));
  points_list.push_back(cv::Point2f(1434, 309));
  points_list.push_back(cv::Point2f(1433, 310));
  points_list.push_back(cv::Point2f(1427, 310));
  points_list.push_back(cv::Point2f(1427, 312));
  points_list.push_back(cv::Point2f(1426, 313));
  points_list.push_back(cv::Point2f(1422, 313));
  points_list.push_back(cv::Point2f(1422, 314));

  // [1421, 315], [1415, 315], [1415, 316], [1414, 317], [1408, 317], [1408, 319], [1407, 320], [1403, 320],
  points_list.push_back(cv::Point2f(1421, 315));
  points_list.push_back(cv::Point2f(1415, 315));
  points_list.push_back(cv::Point2f(1415, 316));
  points_list.push_back(cv::Point2f(1414, 317));
  points_list.push_back(cv::Point2f(1408, 317));
  points_list.push_back(cv::Point2f(1408, 319));
  points_list.push_back(cv::Point2f(1407, 320));
  points_list.push_back(cv::Point2f(1403, 320));

  // [1403, 321], [1402, 322], [1396, 322], [1396, 323], [1395, 324], [1389, 324], [1389, 326], [1388, 327],
  points_list.push_back(cv::Point2f(1403, 321));
  points_list.push_back(cv::Point2f(1402, 322));
  points_list.push_back(cv::Point2f(1396, 322));
  points_list.push_back(cv::Point2f(1396, 323));
  points_list.push_back(cv::Point2f(1395, 324));
  points_list.push_back(cv::Point2f(1389, 324));
  points_list.push_back(cv::Point2f(1389, 326));
  points_list.push_back(cv::Point2f(1388, 327));

  // [1382, 327], [1382, 328], [1381, 329], [1376, 329], [1376, 330], [1375, 331], [1369, 331], [1369, 333],
  points_list.push_back(cv::Point2f(1382, 327));
  points_list.push_back(cv::Point2f(1382, 328));
  points_list.push_back(cv::Point2f(1381, 329));
  points_list.push_back(cv::Point2f(1376, 329));
  points_list.push_back(cv::Point2f(1376, 330));
  points_list.push_back(cv::Point2f(1375, 331));
  points_list.push_back(cv::Point2f(1369, 331));
  points_list.push_back(cv::Point2f(1369, 333));

  // [1368, 334], [1362, 334], [1362, 335], [1361, 336], [1359, 336], [1359, 1016], [1365, 1016], [1366, 1017],
  points_list.push_back(cv::Point2f(1368, 334));
  points_list.push_back(cv::Point2f(1362, 334));
  points_list.push_back(cv::Point2f(1362, 335));
  points_list.push_back(cv::Point2f(1361, 336));
  points_list.push_back(cv::Point2f(1359, 336));
  points_list.push_back(cv::Point2f(1359, 1016));
  points_list.push_back(cv::Point2f(1365, 1016));
  points_list.push_back(cv::Point2f(1366, 1017));

  // [1366, 1019], [1430, 1019], [1430, 1017], [1431, 1016], [1440, 1016], [1440, 308]
  points_list.push_back(cv::Point2f(1366, 1019));
  points_list.push_back(cv::Point2f(1430, 1019));
  points_list.push_back(cv::Point2f(1430, 1017));
  points_list.push_back(cv::Point2f(1431, 1016));
  points_list.push_back(cv::Point2f(1440, 1016));
  points_list.push_back(cv::Point2f(1440, 308));

  cv::Mat pointsf;
  cv::Mat(points_list).convertTo(pointsf, CV_32F);

  cv::RotatedRect ellipse_params = cv::fitEllipseAMS(pointsf);
  std::cout << "ellipse_params, center=" << ellipse_params.center << " ; size=" << ellipse_params.size
    << " ; angle=" << ellipse_params.angle << std::endl;

  cv::TickMeter tm;
  tm.start();
  cv::Mat dist_map_8u = drawEllipseDistanceMap(ellipse_params);
  tm.stop();
  std::cout << "Elapsed time: " << tm.getAvgTimeSec() << " sec" << std::endl;

  cv::Point center(ellipse_params.center.x, ellipse_params.center.y);
  cv::Point axis(ellipse_params.size.width/2, ellipse_params.size.height/2);
  std::vector<cv::Point> ellipse_pts_list;
  cv::ellipse2Poly(center, axis, ellipse_params.angle, 0, 360, 1, ellipse_pts_list);
  cv::polylines(dist_map_8u, ellipse_pts_list, false, cv::Scalar(0, 0, 0), 3);

  // Points to be fitted
  cv::Mat closest_pts;
  cv::getClosestEllipsePoints(ellipse_params, pointsf, closest_pts);
  for (int i = 0; i < closest_pts.rows; i++) {
    cv::Point pt;
    pt.x = closest_pts.at<cv::Point2f>(i).x;
    pt.y = closest_pts.at<cv::Point2f>(i).y;
    cv::circle(dist_map_8u, pt, 8, cv::Scalar(0, 0, 255), 2);
  }

  cv::imwrite("dist_map_8u.png", dist_map_8u);

  return EXIT_SUCCESS;
}
```
</details>

![image](https://github.com/user-attachments/assets/3345cc86-ba83-44f9-ac78-74058a33a7dc)

---

### 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.
- [x] The feature is well documented and sample code can be built with the project CMake
 2025-06-03 17:12:16 +03:00
Alexander Smorkalov 0ccbd21c0a Relax remap relative test to handle the case when HAL implements not remap options. 2025-06-03 11:24:07 +03:00
Liane Lin 8a0ea789e7 Merge pull request #27149 from liane-lin:4.x 
Fix #25696: Solved the problem in Subdiv2D, empty delaunay triangulation #27149

Detailed description

Expected behaviour:
Given 4 points, where no three points are collinear, the Delaunay Triangulation Algorithm should return 2 triangles.

Actual:
The algorithm returns zero triangles in this particular case.

Fix:
The radius of the circumcircle tends to infinity when the points are closer to form collinear points, so the problem occurs because the super-triangles are not large enough,
which then results in certain edges are not swapped. The proposed solution just increases the super triangle, duplicating the value of constant for example.

### 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
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake
 2025-05-30 15:20:01 +03:00
omahs 0bc95d9256 Merge pull request #27338 from omahs:patch-1 
Fix typos #27338

### 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
- [ ] There is a reference to the original bug report and related work
- [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable
      Patch to opencv_extra has the same branch name.
- [ ] The feature is well documented and sample code can be built with the project CMake
 2025-05-21 12:13:50 +03:00
Abhishek Gola 838babe351 Fixed bilateral filter's sigma color and sigma space issue 2025-05-14 14:22:05 +05:30
Kumataro 86a963cec9 Merge pull request #27226 from Kumataro:fix27225 
imgproc: cvtColor: remove to copy edge pixels for COLOR_Bayer*_VNGs. #27226 

Close https://github.com/opencv/opencv/issues/27225
Close https://github.com/opencv/opencv/issues/5089
Related https://github.com/opencv/opencv_extra/pull/1249

### 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.
- [ ] The feature is well documented and sample code can be built with the project CMake
 2025-04-25 11:29:22 +03:00
YooLc f20facc60a Merge pull request #27060 from YooLc:hal-rvv-integral 
[hal_rvv] Add cv::integral implementation and more types of input for test #27060

This patch introduces an RVV-optimized implementation of `cv::integral()` in hal_rvv, along with performance and accuracy tests for all valid input/output type combinations specified in `modules/imgproc/src/hal_replacement.hpp`:
https://github.com/opencv/opencv/blob/2a8d4b8e43f6e499c5553edd26056caed284d5a6/modules/imgproc/src/hal_replacement.hpp#L960-L974

The vectorized prefix sum algorithm follows the approach described in [Prefix Sum with SIMD - Algorithmica](https://en.algorithmica.org/hpc/algorithms/prefix/).

I intentionally omitted support for the following cases by returning `CV_HAL_ERROR_NOT_IMPLEMENTED`, as they are harder to implement or show limited performance gains:
1. **Tilted Sum**: The data access pattern for tilted sums requires multi-row operations, making effective vectorization difficult.
2. **3-channel images (`cn == 3`)**: Current implementation requires `VLEN/SEW` (a.k.a. number of elements in a vector register) to be a multiple of channel count, which 3-channel formats typically cannot satisfy.
    - Support for 1, 2 and 4 channel images is implemented
4. **Small images (`!(width >> 8 || height >> 8)`)**: The scalar implementation demonstrates better performance for images with limited dimensions. 
    - This is the same as `3rdparty/ndsrvp/src/integral.cpp` https://github.com/opencv/opencv/blob/09c71aed141210bf2b14582974ed9d231c24edd5/3rdparty/ndsrvp/src/integral.cpp#L24-L26

Test configuration:

- Platform: SpacemiT Muse Pi (K1 @ 1.60 Ghz)
- Toolchain: GCC 14.2.0
- `integral_sqsum_full` test is disabled by default, so `--gtest_also_run_disabled_tests` is needed

Test results:

```plaintext
Geometric mean (ms)

                                     Name of Test                                       imgproc-gcc-scalar imgproc-gcc-hal  imgproc-gcc-hal  
                                                                                                                                   vs        
                                                                                                                           imgproc-gcc-scalar
                                                                                                                               (x-factor)      
integral::Size_MatType_OutMatDepth::(640x480, 8UC1, CV_32F)                                   1.973             1.415             1.39       
integral::Size_MatType_OutMatDepth::(640x480, 8UC1, CV_32S)                                   1.343             1.351             0.99       
integral::Size_MatType_OutMatDepth::(640x480, 8UC1, CV_64F)                                   2.021             2.756             0.73       
integral::Size_MatType_OutMatDepth::(640x480, 8UC2, CV_32F)                                   4.695             2.874             1.63       
integral::Size_MatType_OutMatDepth::(640x480, 8UC2, CV_32S)                                   4.028             2.801             1.44       
integral::Size_MatType_OutMatDepth::(640x480, 8UC2, CV_64F)                                   5.965             4.926             1.21       
integral::Size_MatType_OutMatDepth::(640x480, 8UC4, CV_32F)                                   9.970             4.440             2.25       
integral::Size_MatType_OutMatDepth::(640x480, 8UC4, CV_32S)                                   7.934             4.244             1.87       
integral::Size_MatType_OutMatDepth::(640x480, 8UC4, CV_64F)                                   14.696            8.431             1.74       
integral::Size_MatType_OutMatDepth::(1280x720, 8UC1, CV_32F)                                  5.949             4.108             1.45       
integral::Size_MatType_OutMatDepth::(1280x720, 8UC1, CV_32S)                                  4.064             4.080             1.00       
integral::Size_MatType_OutMatDepth::(1280x720, 8UC1, CV_64F)                                  6.137             7.975             0.77       
integral::Size_MatType_OutMatDepth::(1280x720, 8UC2, CV_32F)                                  13.896            8.721             1.59       
integral::Size_MatType_OutMatDepth::(1280x720, 8UC2, CV_32S)                                  10.948            8.513             1.29       
integral::Size_MatType_OutMatDepth::(1280x720, 8UC2, CV_64F)                                  18.046           15.234             1.18       
integral::Size_MatType_OutMatDepth::(1280x720, 8UC4, CV_32F)                                  35.105           13.778             2.55       
integral::Size_MatType_OutMatDepth::(1280x720, 8UC4, CV_32S)                                  27.135           13.417             2.02       
integral::Size_MatType_OutMatDepth::(1280x720, 8UC4, CV_64F)                                  43.477           25.616             1.70       
integral::Size_MatType_OutMatDepth::(1920x1080, 8UC1, CV_32F)                                 13.386            9.281             1.44       
integral::Size_MatType_OutMatDepth::(1920x1080, 8UC1, CV_32S)                                 9.159             9.194             1.00       
integral::Size_MatType_OutMatDepth::(1920x1080, 8UC1, CV_64F)                                 13.776           17.836             0.77       
integral::Size_MatType_OutMatDepth::(1920x1080, 8UC2, CV_32F)                                 31.943           19.435             1.64       
integral::Size_MatType_OutMatDepth::(1920x1080, 8UC2, CV_32S)                                 24.747           18.946             1.31       
integral::Size_MatType_OutMatDepth::(1920x1080, 8UC2, CV_64F)                                 35.925           33.943             1.06       
integral::Size_MatType_OutMatDepth::(1920x1080, 8UC4, CV_32F)                                 66.493           29.692             2.24       
integral::Size_MatType_OutMatDepth::(1920x1080, 8UC4, CV_32S)                                 54.737           28.250             1.94       
integral::Size_MatType_OutMatDepth::(1920x1080, 8UC4, CV_64F)                                 91.880           57.495             1.60            
integral_sqsum::Size_MatType_OutMatDepth::(640x480, 8UC1, CV_32F)                             4.384             4.016             1.09       
integral_sqsum::Size_MatType_OutMatDepth::(640x480, 8UC1, CV_32S)                             3.676             3.960             0.93       
integral_sqsum::Size_MatType_OutMatDepth::(640x480, 8UC1, CV_64F)                             5.620             5.224             1.08       
integral_sqsum::Size_MatType_OutMatDepth::(640x480, 8UC2, CV_32F)                             9.971             7.696             1.30       
integral_sqsum::Size_MatType_OutMatDepth::(640x480, 8UC2, CV_32S)                             8.934             7.632             1.17       
integral_sqsum::Size_MatType_OutMatDepth::(640x480, 8UC2, CV_64F)                             9.927             9.759             1.02       
integral_sqsum::Size_MatType_OutMatDepth::(640x480, 8UC4, CV_32F)                             21.556           12.288             1.75       
integral_sqsum::Size_MatType_OutMatDepth::(640x480, 8UC4, CV_32S)                             21.261           12.089             1.76       
integral_sqsum::Size_MatType_OutMatDepth::(640x480, 8UC4, CV_64F)                             23.989           16.278             1.47       
integral_sqsum::Size_MatType_OutMatDepth::(1280x720, 8UC1, CV_32F)                            15.232           11.752             1.30       
integral_sqsum::Size_MatType_OutMatDepth::(1280x720, 8UC1, CV_32S)                            12.976           11.721             1.11       
integral_sqsum::Size_MatType_OutMatDepth::(1280x720, 8UC1, CV_64F)                            16.450           15.627             1.05       
integral_sqsum::Size_MatType_OutMatDepth::(1280x720, 8UC2, CV_32F)                            25.932           23.243             1.12       
integral_sqsum::Size_MatType_OutMatDepth::(1280x720, 8UC2, CV_32S)                            24.750           23.019             1.08       
integral_sqsum::Size_MatType_OutMatDepth::(1280x720, 8UC2, CV_64F)                            28.228           29.605             0.95       
integral_sqsum::Size_MatType_OutMatDepth::(1280x720, 8UC4, CV_32F)                            61.665           37.477             1.65       
integral_sqsum::Size_MatType_OutMatDepth::(1280x720, 8UC4, CV_32S)                            61.536           37.126             1.66       
integral_sqsum::Size_MatType_OutMatDepth::(1280x720, 8UC4, CV_64F)                            73.989           48.994             1.51       
integral_sqsum::Size_MatType_OutMatDepth::(1920x1080, 8UC1, CV_32F)                           49.640           26.529             1.87       
integral_sqsum::Size_MatType_OutMatDepth::(1920x1080, 8UC1, CV_32S)                           35.869           26.417             1.36       
integral_sqsum::Size_MatType_OutMatDepth::(1920x1080, 8UC1, CV_64F)                           34.378           35.056             0.98       
integral_sqsum::Size_MatType_OutMatDepth::(1920x1080, 8UC2, CV_32F)                           82.138           52.661             1.56       
integral_sqsum::Size_MatType_OutMatDepth::(1920x1080, 8UC2, CV_32S)                           54.644           52.089             1.05       
integral_sqsum::Size_MatType_OutMatDepth::(1920x1080, 8UC2, CV_64F)                           75.073           66.670             1.13       
integral_sqsum::Size_MatType_OutMatDepth::(1920x1080, 8UC4, CV_32F)                          143.283           83.943             1.71       
integral_sqsum::Size_MatType_OutMatDepth::(1920x1080, 8UC4, CV_32S)                          156.851           82.378             1.90       
integral_sqsum::Size_MatType_OutMatDepth::(1920x1080, 8UC4, CV_64F)                          521.594           111.375            4.68            
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC1, DEPTH_32F_32F))          3.529             2.787             1.27       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC1, DEPTH_32F_64F))          4.396             3.998             1.10       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC1, DEPTH_32S_32F))          3.229             2.774             1.16       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC1, DEPTH_32S_32S))          2.945             2.780             1.06       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC1, DEPTH_32S_64F))          3.857             3.995             0.97       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC1, DEPTH_64F_64F))          5.872             5.228             1.12       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (16UC1, DEPTH_64F_64F))         6.075             5.277             1.15       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (16SC1, DEPTH_64F_64F))         5.680             5.296             1.07       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (32FC1, DEPTH_32F_32F))         3.355             2.896             1.16       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (32FC1, DEPTH_32F_64F))         4.183             4.000             1.05       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (32FC1, DEPTH_64F_64F))         6.237             5.143             1.21       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (64FC1, DEPTH_64F_64F))         4.753             4.783             0.99       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC2, DEPTH_32F_32F))          8.021             5.793             1.38       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC2, DEPTH_32F_64F))          9.963             7.704             1.29       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC2, DEPTH_32S_32F))          7.864             5.720             1.37       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC2, DEPTH_32S_32S))          7.141             5.699             1.25       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC2, DEPTH_32S_64F))          9.228             7.646             1.21       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC2, DEPTH_64F_64F))          9.940             9.759             1.02       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (16UC2, DEPTH_64F_64F))         10.606            9.716             1.09       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (16SC2, DEPTH_64F_64F))         9.933             9.751             1.02       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (32FC2, DEPTH_32F_32F))         7.986             5.962             1.34       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (32FC2, DEPTH_32F_64F))         9.243             7.598             1.22       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (32FC2, DEPTH_64F_64F))         10.573            9.425             1.12       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (64FC2, DEPTH_64F_64F))         11.029            8.977             1.23       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC4, DEPTH_32F_32F))          17.236            8.881             1.94       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC4, DEPTH_32F_64F))          20.905           12.322             1.70       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC4, DEPTH_32S_32F))          16.011            8.666             1.85       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC4, DEPTH_32S_32S))          15.932            8.507             1.87       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC4, DEPTH_32S_64F))          20.713           12.115             1.71       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (8UC4, DEPTH_64F_64F))          23.953           16.284             1.47       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (16UC4, DEPTH_64F_64F))         25.127           16.341             1.54       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (16SC4, DEPTH_64F_64F))         24.950           16.441             1.52       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (32FC4, DEPTH_32F_32F))         17.261            8.906             1.94       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (32FC4, DEPTH_32F_64F))         21.944           12.073             1.82       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (32FC4, DEPTH_64F_64F))         25.921           15.539             1.67       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(640x480, (64FC4, DEPTH_64F_64F))         27.938           14.824             1.88       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC1, DEPTH_32F_32F))         11.156            8.260             1.35       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC1, DEPTH_32F_64F))         14.777           11.869             1.24       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC1, DEPTH_32S_32F))         9.693             8.221             1.18       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC1, DEPTH_32S_32S))         9.023             8.256             1.09       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC1, DEPTH_32S_64F))         13.276           11.821             1.12       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC1, DEPTH_64F_64F))         15.406           15.618             0.99       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (16UC1, DEPTH_64F_64F))        16.799           15.749             1.07       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (16SC1, DEPTH_64F_64F))        15.054           15.806             0.95       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (32FC1, DEPTH_32F_32F))        10.055            7.999             1.26       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (32FC1, DEPTH_32F_64F))        13.506           11.253             1.20       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (32FC1, DEPTH_64F_64F))        14.952           15.021             1.00       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (64FC1, DEPTH_64F_64F))        13.761           14.002             0.98       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC2, DEPTH_32F_32F))         22.677           17.330             1.31       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC2, DEPTH_32F_64F))         26.283           23.237             1.13       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC2, DEPTH_32S_32F))         20.126           17.118             1.18       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC2, DEPTH_32S_32S))         19.337           17.041             1.13       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC2, DEPTH_32S_64F))         24.973           23.004             1.09       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC2, DEPTH_64F_64F))         29.959           29.585             1.01       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (16UC2, DEPTH_64F_64F))        33.598           29.599             1.14       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (16SC2, DEPTH_64F_64F))        46.213           29.741             1.55       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (32FC2, DEPTH_32F_32F))        33.077           17.556             1.88       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (32FC2, DEPTH_32F_64F))        33.960           22.991             1.48       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (32FC2, DEPTH_64F_64F))        41.792           28.803             1.45       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (64FC2, DEPTH_64F_64F))        34.660           28.532             1.21       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC4, DEPTH_32F_32F))         52.989           27.659             1.92       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC4, DEPTH_32F_64F))         62.418           37.515             1.66       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC4, DEPTH_32S_32F))         50.902           27.310             1.86       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC4, DEPTH_32S_32S))         47.301           27.019             1.75       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC4, DEPTH_32S_64F))         61.982           37.140             1.67       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (8UC4, DEPTH_64F_64F))         79.403           49.041             1.62       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (16UC4, DEPTH_64F_64F))        86.550           49.180             1.76       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (16SC4, DEPTH_64F_64F))        85.715           49.468             1.73       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (32FC4, DEPTH_32F_32F))        63.932           28.019             2.28       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (32FC4, DEPTH_32F_64F))        68.180           36.858             1.85       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (32FC4, DEPTH_64F_64F))        83.063           46.483             1.79       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1280x720, (64FC4, DEPTH_64F_64F))        91.990           44.545             2.07       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC1, DEPTH_32F_32F))        25.503           18.609             1.37       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC1, DEPTH_32F_64F))        29.544           26.635             1.11       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC1, DEPTH_32S_32F))        22.581           18.514             1.22       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC1, DEPTH_32S_32S))        20.860           18.547             1.12       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC1, DEPTH_32S_64F))        26.046           26.373             0.99       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC1, DEPTH_64F_64F))        34.831           34.997             1.00       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (16UC1, DEPTH_64F_64F))       36.428           35.214             1.03       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (16SC1, DEPTH_64F_64F))       32.435           35.314             0.92       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (32FC1, DEPTH_32F_32F))       22.548           18.845             1.20       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (32FC1, DEPTH_32F_64F))       28.589           25.790             1.11       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (32FC1, DEPTH_64F_64F))       32.625           33.791             0.97       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (64FC1, DEPTH_64F_64F))       30.158           31.889             0.95       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC2, DEPTH_32F_32F))        53.374           38.938             1.37       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC2, DEPTH_32F_64F))        73.892           52.747             1.40       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC2, DEPTH_32S_32F))        47.392           38.572             1.23       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC2, DEPTH_32S_32S))        45.638           38.225             1.19       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC2, DEPTH_32S_64F))        69.966           52.156             1.34       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC2, DEPTH_64F_64F))        68.560           66.963             1.02       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (16UC2, DEPTH_64F_64F))       71.487           65.420             1.09       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (16SC2, DEPTH_64F_64F))       68.127           65.718             1.04       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (32FC2, DEPTH_32F_32F))       72.967           39.987             1.82       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (32FC2, DEPTH_32F_64F))       63.933           51.408             1.24       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (32FC2, DEPTH_64F_64F))       73.334           63.354             1.16       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (64FC2, DEPTH_64F_64F))       80.983           60.778             1.33       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC4, DEPTH_32F_32F))       116.981           59.908             1.95       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC4, DEPTH_32F_64F))       155.085           83.974             1.85       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC4, DEPTH_32S_32F))       109.567           58.525             1.87       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC4, DEPTH_32S_32S))       105.457           57.124             1.85       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC4, DEPTH_32S_64F))       157.325           82.485             1.91       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (8UC4, DEPTH_64F_64F))       265.776           111.577            2.38       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (16UC4, DEPTH_64F_64F))      585.218           110.583            5.29       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (16SC4, DEPTH_64F_64F))      585.418           111.302            5.26       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (32FC4, DEPTH_32F_32F))      126.456           60.415             2.09       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (32FC4, DEPTH_32F_64F))      169.278           81.460             2.08       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (32FC4, DEPTH_64F_64F))      281.256           104.732            2.69       
integral_sqsum_full::Size_MatType_OutMatDepthArray::(1920x1080, (64FC4, DEPTH_64F_64F))      620.885           99.953             6.21       
```

The vectorized implementation shows progressively better acceleration for larger image sizes and higher channel counts, achieving up to 6.21× speedup for 64FC4 (1920×1080) inputs with `DEPTH_64F_64F` configuration.

This is my first time proposing patch for the OpenCV Project 🥹, if there's anything that can be improved, please tell me.

### 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
- [ ] 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.
- [x] The feature is well documented and sample code can be built with the project CMake
 2025-04-21 09:50:13 +03:00
Kumataro c1d71d5375 Merge pull request #27220 from Kumataro:fix24757 
imgproc: disable SIMD for compareHist(INTERSECT) if f64 is unsupported #27220

Close https://github.com/opencv/opencv/issues/24757

### 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.
- [ ] The feature is well documented and sample code can be built with the project CMake
 2025-04-10 17:24:01 +03:00
Pierre Chatelier 0db6a496ba Merge pull request #26842 from chacha21:threshold_with_mask 
Added optional mask to cv::threshold #26842
 
Proposal for #26777

To avoid code duplication, and keep performance when no mask is used, inner implementation always propagate the const cv::Mat& mask, but they use a template<bool useMask> parameter that let the compiler optimize out unnecessary tests when the mask is not to be used.

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.
- [ ] The feature is well documented and sample code can be built with the project CMake
 2025-03-12 17:55:07 +03:00
Maxim Smolskiy dbd3ef9a6f Merge pull request #26926 from MaximSmolskiy:fix-getPerspectiveTransform-for-singular-case 
Fix getPerspectiveTransform for singular case #26926

### Pull Request Readiness Checklist

Fix #26916 

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.
- [x] The feature is well documented and sample code can be built with the project CMake
 2025-03-02 12:44:39 +03:00
shyama7004 076bfa6431 Fix _DEBUG/NDEBUG handling across modules (#26151) 2025-02-11 22:00:44 +05:30
Pierre Chatelier 3cbb4acd2d Merge pull request #26836 from chacha21:thresholding_compute_threshold_only 
Add cv::THRESH_DRYRUN flag to get adaptive threshold values without thresholding #26836

A first proposal for #26777

Adds a `cv::THRESH_DRYRUN` flag to let cv::threshold() compute the threshold (useful for OTSU/TRIANGLE), but without actually running the thresholding. This flags is a proposal instead of a new function cv::computeThreshold()

- [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.
- [ ] The feature is well documented and sample code can be built with the project CMake
 2025-01-24 14:25:21 +03:00
Maxim Smolskiy 8ab0ad6e1b Merge pull request #26810 from MaximSmolskiy:improve-robustness-for-fitEllipseAMS 
Improve robustness for fitEllipseAMS #26810

### Pull Request Readiness Checklist

Related to #26694 

Added functionality to add noise to points in degenerate cases and try again for `fitEllipseAMS`. `fitEllipseNoDirect` and `fitEllipseDirect` already have this

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.
- [x] The feature is well documented and sample code can be built with the project CMake
 2025-01-22 12:49:12 +03:00
Maxim Smolskiy a2a3f5e86c Merge pull request #26773 from MaximSmolskiy:improve-robustness-for-ellipse-fitting 
Improve robustness for ellipse fitting #26773

### Pull Request Readiness Checklist

Related to #26694 

Current noise addition is not very good because for example it turns degenerate case of one horizontal line into degenerate case of two parallel horizontal lines

Improving noise addition leads to improved robustness of algorithms

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 2025-01-20 14:25:40 +03:00
Alexander Smorkalov e34eff9ab2 Merge pull request #26721 from MaximSmolskiy:fix-comment-for-fitEllipse-Java-case-accurracy-test 
Fix comment for fitEllipse Java case accurracy test
 2025-01-08 11:09:32 +03:00
Alexander Smorkalov 0dfd2b3628 Merge pull request #26719 from MaximSmolskiy:remove-code-duplication-from-tests-for-ellipse-fitting 
Remove code duplication from tests for ellipse fitting
 2025-01-08 11:07:55 +03:00
MaximSmolskiy 9b85ab0a63 Fix comment for fitEllipse Java case accurracy test 2025-01-06 19:14:57 +03:00
MaximSmolskiy 56dd9d51b1 Remove code duplication from tests for ellipse fitting 2025-01-06 17:13:32 +03:00
Masahiro Ogawa fc994a6ae8 Merge pull request #21407 from sensyn-robotics:feature/weighted_hough 
Feature: weighted Hough Transform #21407

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 2025-01-06 15:35:35 +03:00
MaximSmolskiy 3e534bb7c8 Fix tests for ellipse fitting 2025-01-06 01:27:06 +03:00
MaximSmolskiy ab0a818c84 Fix matchTemplate with mask crash 2025-01-02 22:14:08 +03:00
Maksim Shabunin 0756dbfe3d RISC-V: enabled intrinsics in dotProd, relaxed test thresholds 2024-12-24 00:58:54 +03:00
Kumataro 260f511dfb Merge pull request #26590 from Kumataro:fix26589 
Support C++20 standard #26590

Close https://github.com/opencv/opencv/issues/26589
Related https://github.com/opencv/opencv_contrib/pull/3842
Related: https://github.com/opencv/opencv/issues/20269

- do not arithmetic enums and ( different enums or floating numeric) 
- remove unused variable

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 2024-12-17 07:40:27 +03:00
Suleyman TURKMEN b385767c1c Update drawing.cpp and test_contours.cpp 2024-11-25 20:35:20 +03:00
Rostislav Vasilikhin 21cb138be8 warpPerspective border type test 2024-11-15 19:28:16 +01:00
Vincent Rabaud 265a2c39b2 Fix test typo. 2024-10-30 15:05:30 +01:00
Kumataro 40428d919d Merge pull request #26259 from Kumataro:fix26258 
core: C-API cleanup: RNG algorithms in core(4.x) #26259

- replace CV_RAND_UNI and NORMAL to cv::RNG::UNIFORM and cv::RNG::NORMAL.

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 2024-10-08 15:55:00 +03:00
inayd 93a882d2e2 Fix fillPoly drawing over boundaries 2024-10-01 21:17:42 +02:00
Rostislav Vasilikhin 9ef574a213 added bit-exact tests for RGB2Gray 2024-09-05 03:34:35 +02:00
Kumataro a3bdbf5553 Merge pull request #26022 from Kumataro:fix26016 
Imgproc: use double to determine whether the corners points are within src #26022

close #26016
Related https://github.com/opencv/opencv_contrib/pull/3778

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 2024-08-23 12:35:13 +03:00
FantasqueX 7cf075c392 Merge pull request #25968 from FantasqueX:correct-bayer2gray-simd-1 
Correct Bayer2Gray u8 SIMD #25968

SIMD version of CV_DESCALE is not correct. It should be implemented using v_dotprod.

What's more, the stop condition of vector operation should be `bayer < bayer_end - 14` because we just need to make sure result is safely stored into `dst`.

Closes: https://github.com/opencv/opencv/issues/25823

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 2024-08-21 11:33:07 +03:00
Kumataro da3debda6d Merge pull request #25981 from Kumataro:fix25971 
imgproc: add specific error code when cvtColor is used on an image with an invalid number of channels #25981

close #25971

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 2024-08-09 14:22:02 +03:00
Rostislav Vasilikhin 1acf722e24 Merge pull request #25970 from savuor:rv/hal_pyrdown 
pyrDown: offset HAL added, IPP removed #25970

Resolves #25976

### Changes
* HAL added for offset support so that border pixels can be fetched from outside of the image ROI (see `BORDER_ISOLATED` parameter)
* IPP removed since there is `pyrUp` instead of `pyrDown` and there's no easy way to fix this other than rewriting it from scratch
* replaced old C call by modern `cv::pyrDown`

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 2024-08-06 15:04:53 +03:00
Alexander Smorkalov 49459d46e2 Merge pull request #25932 from asmorkalov:as/HAL_cvtColor_aprox 
Added xxxApprox overloads for YUV color conversions in HAL and AlgorithmHint to cvtColor #25932

The xxxApprox to implement HAL functions with less bits for arithmetic of FP.

The hint was introduced in #25792 and #25911

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 2024-08-06 11:40:58 +03:00
_Ayaka 4dd54bbec9 Merge pull request #25898 from Octopus136:issue-25853 
Add a check for src == dst in ocl warpTransform #25898

As mentioned in #25853, when doing WarpAffine with Mat and UMat respectively, if you force the use of the in-place operation (so that src and dst are passed the same variables), Mat produces the correct results, but UMat produces unexpected results.

Obviously in-place operations are not possible with this transformation. When Mat performs the operation, if dst and src are the same variable, the function inherently makes a copy of src without telling the user. 

https://github.com/opencv/opencv/blob/74b50c7af05c91194469a1f059f971dff00ef889/modules/imgproc/src/imgwarp.cpp#L2831-L2834

So I did the same check in UMat, but I'm not sure if it's appropriate, should we just do a copy operation without telling the user (even if the user thinks he's doing an in-place operation), or should we throw an exception to indicate that we shouldn't pass in two same variables here?

The possible reason for this problem is that there is a create function here, so it gives the developer the false impression that this create function has allocated new memory for dst, however it does not.

https://github.com/opencv/opencv/blob/74b50c7af05c91194469a1f059f971dff00ef889/modules/imgproc/src/imgwarp.cpp#L2607-L2609

Because by the time the check is done here, the function has returned back.

https://github.com/opencv/opencv/blob/74b50c7af05c91194469a1f059f971dff00ef889/modules/core/src/umatrix.cpp#L668-L675

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 2024-07-19 09:08:19 +03:00
Alexander Smorkalov a6b8ea892b Post-merge fixes for algorithm hint API. 2024-07-15 14:44:03 +03:00
Alexander Smorkalov 15783d6598 Merge pull request #25792 from asmorkalov:as/HAL_fast_GaussianBlur 
Added flag to GaussianBlur for faster but not bit-exact implementation #25792

Rationale:
Current implementation of GaussianBlur is almost always bit-exact. It helps to get predictable results according platforms, but prohibits most of approximations and optimization tricks.

The patch converts `borderType` parameter to more generic `flags` and introduces `GAUSS_ALLOW_APPROXIMATIONS` flag to allow not bit-exact implementation. With the flag IPP and generic HAL implementation are called first. The flag naming and location is a subject for discussion.

Replaces https://github.com/opencv/opencv/pull/22073
Possibly related issue: https://github.com/opencv/opencv/issues/24135

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 2024-07-12 15:03:33 +03:00
Maksim Shabunin 06b9db6a71 imgproc: reduce template sizes in templMatch test 2024-07-10 11:06:25 +03:00
Mironov Arseny b964943517 Merge pull request #25607 from Fest1veNapkin:imgproc_approx_bounding_poly 
Add a new function that approximates the polygon bounding a convex hull with a certain number of sides #25607

merge PR with <https://github.com/opencv/opencv_extra/pull/1179>

This PR is based on the paper [View Frustum Optimization To Maximize Object’s Image Area](https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=1fbd43f3827fffeb76641a9c5ab5b625eb5a75ba).

# Problem
I needed to reduce the number of vertices of the convex hull so that the additional area was minimal, andall vertices of the original contour enter the new contour.

![image](https://github.com/Fest1veNapkin/opencv/assets/98156294/efac35f6-b8f0-46ec-91e4-60800432620c)

![image](https://github.com/Fest1veNapkin/opencv/assets/98156294/2292d9d7-1c10-49c9-8489-23221b4b28f7)

# Description
Initially in the contour of n vertices, at each stage we consider the intersection points of the lines formed by each adjacent edges. Each of these intersection points will form a triangle with vertices through which lines pass. Let's choose a triangle with the minimum area and merge the two vertices at the intersection point. We continue until there are more vertices than the specified number of sides of the approximated polygon.
![image](https://github.com/Fest1veNapkin/opencv/assets/98156294/b87b21c4-112e-450d-a776-2a120048ca30)

# Complexity:
Using a std::priority_queue or std::set  time complexity is **(O(n\*ln(n))**, memory **O(n)**,
n - number of vertices in convex hull.

count of sides - the number of points by which we must reduce.
![image](https://github.com/Fest1veNapkin/opencv/assets/98156294/31ad5562-a67d-4e3c-bdc2-29f8b52caf88)

## Comment
If epsilon_percentage more 0, algorithm can return more values than _side_.
Algorithm returns OutputArray. If OutputArray.type() equals 0, algorithm returns values with InputArray.type().
New test uses image which are not in opencv_extra, needs to be added.

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 2024-07-09 17:11:23 +03:00
Maksim Shabunin 94b7a2d320 Merge pull request #25842 from mshabunin:cpp-imgproc-test-4.x 
imgproc: remove C-API usage from tests #25842

Final cleanup will be done in 5.x after regular merge.

Some tests have been reworked, some required only slight modifications.
 2024-07-04 16:29:08 +03:00
Alexander Smorkalov ee2b0f9d63 Relax equalizeHist test for some HAL implementations. 2024-06-27 19:14:30 +03:00
Alexander Smorkalov e7108f48ab Extended bilateralFilter test to cover more branches. 2024-06-19 15:35:03 +03:00