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Merge pull request #21942 from pglotov:add-blob-contours

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added blob contours to blob detector

* added blob contours

* Fixed Java regression test after new parameter addition to SimpleBlobDetector.

* Added stub implementation of SimpleBlobDetector::getBlobContours to presume source API compatibility.
This commit is contained in:
Petr Glotov
2022-10-07 09:07:51 -07:00
committed by GitHub
parent 5cd07006f6
commit a3ebafbdeb
5 changed files with 122 additions and 6 deletions
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modules/features2d/test/test_blobdetector.cpp
+24
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@@ -19,4 +19,28 @@ TEST(Features2d_BlobDetector, bug_6667)
detector->detect(image, keypoints);
ASSERT_NE((int) keypoints.size(), 0);
}
TEST(Features2d_BlobDetector, withContours)
{
cv::Mat image = cv::Mat(cv::Size(100, 100), CV_8UC1, cv::Scalar(255, 255, 255));
cv::circle(image, Point(50, 50), 20, cv::Scalar(0), -1);
SimpleBlobDetector::Params params;
params.minThreshold = 250;
params.maxThreshold = 260;
params.minRepeatability = 1; // https://github.com/opencv/opencv/issues/6667
params.collectContours = true;
std::vector<KeyPoint> keypoints;
Ptr<SimpleBlobDetector> detector = SimpleBlobDetector::create(params);
detector->detect(image, keypoints);
ASSERT_NE((int)keypoints.size(), 0);
ASSERT_GT((int)detector->getBlobContours().size(), 0);
std::vector<Point> contour = detector->getBlobContours()[0];
ASSERT_TRUE(std::any_of(contour.begin(), contour.end(),
[](Point p)
{
return abs(p.x - 30) < 2 && abs(p.y - 50) < 2;
}));
}
}} // namespace