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Merge pull request #27641 from Ma-gi-cian:subdiv2d-rect2f-clean

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Subdiv2d rect2f clean #27641

Closes https://github.com/opencv/opencv/issues/27623

Changes:

- Added Subdiv2D(Rect2f) constructor overload
- Added initDelaunay(Rect2f) method overload

- No changes to the previous implementation to keep it backward compatible
- Added tests for init and testing with edge case of extremely small coordinates

- [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

See original pull request at : https://github.com/opencv/opencv/pull/27631
This commit is contained in:
Aditya Jha
2025-08-15 17:35:27 +05:30
committed by GitHub
parent 9909d0a7d2
commit 7a1ec54c43
3 changed files with 124 additions and 1 deletions
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modules/imgproc/test/test_subdivision2d.cpp
+53
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@@ -64,4 +64,57 @@ TEST(Imgproc_Subdiv2D, issue_25696) {
ASSERT_EQ(static_cast<size_t>(2), triangles.size());
}
// Initialization test
TEST(Imgproc_Subdiv2D, rect2f_constructor_and_init)
{
cv::Rect2f rect_f(0.5f, 1.5f, 100.7f, 200.3f);
cv::Subdiv2D subdiv_f(rect_f);
cv::Point2f pt1(50.2f, 80.1f);
cv::Point2f pt2(75.8f, 120.9f);
cv::Point2f pt3(25.5f, 150.3f);
EXPECT_NO_THROW(subdiv_f.insert(pt1));
EXPECT_NO_THROW(subdiv_f.insert(pt2));
EXPECT_NO_THROW(subdiv_f.insert(pt3));
cv::Subdiv2D subdiv_init;
EXPECT_NO_THROW(subdiv_init.initDelaunay(rect_f));
EXPECT_NO_THROW(subdiv_init.insert(pt1));
EXPECT_NO_THROW(subdiv_init.insert(pt2));
EXPECT_NO_THROW(subdiv_init.insert(pt3));
std::vector<cv::Vec6f> triangles;
EXPECT_NO_THROW(subdiv_f.getTriangleList(triangles));
EXPECT_GT(triangles.size(), 0u);
}
// test with small coordinates
TEST(Imgproc_Subdiv2D, rect2f_edge_cases)
{
cv::Rect2f small_rect(0.0f, 0.0f, 0.1f, 0.1f);
cv::Subdiv2D subdiv_small(small_rect);
cv::Point2f small_pt(0.05f, 0.05f);
EXPECT_NO_THROW(subdiv_small.insert(small_pt));
cv::Rect2f float_rect(10.25f, 20.75f, 50.5f, 30.25f);
cv::Subdiv2D subdiv_float(float_rect);
cv::Point2f float_pt1(35.125f, 35.875f);
cv::Point2f float_pt2(45.375f, 25.625f);
cv::Point2f float_pt3(55.750f, 45.125f);
EXPECT_NO_THROW(subdiv_float.insert(float_pt1));
EXPECT_NO_THROW(subdiv_float.insert(float_pt2));
EXPECT_NO_THROW(subdiv_float.insert(float_pt3));
std::vector<cv::Vec6f> triangles;
subdiv_float.getTriangleList(triangles);
EXPECT_GT(triangles.size(), 0u);
}
}}