vendor: OpenCV 5.0.0 snapshot at 755e50675d97db9b7d449d8bd6b09888646f6c6e

modules/ximgproc/samples/find_ellipses.cpp

@@ -0,0 +1,50 @@
+// 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 <iostream>
+#include <opencv2/imgproc.hpp>
+#include <opencv2/imgcodecs.hpp>
+#include <opencv2/ximgproc.hpp>
+#include <opencv2/highgui.hpp>
+
+using namespace cv;
+
+int main() {
+
+    // load image
+    Mat img = imread(samples::findFile("stuff.jpg"), IMREAD_COLOR);
+
+    // check if image is loaded
+    if (img.empty()) {
+        std::cout << "fail to open image" << std::endl;
+        return EXIT_FAILURE;
+    }
+
+    // create output array
+    std::vector<Vec6f> ells;
+
+    // test ellipse detection
+    cv::ximgproc::findEllipses(img, ells, 0.4f, 0.7f, 0.02f);
+
+    // print output
+    for (unsigned i = 0; i < ells.size(); i++) {
+        Vec6f ell = ells[i];
+        std::cout << ell << std::endl;
+        Scalar color(0, 0, 255);
+        // draw ellipse on image
+        ellipse(
+                img,
+                Point(cvRound(ell[0]), cvRound(ell[1])),
+                Size(cvRound(ell[2]), cvRound(ell[3])),
+                ell[5] * 180 / CV_PI, 0.0, 360.0, color, 3
+        );
+    }
+
+    // show image
+    imshow("result", img);
+    waitKey();
+
+    // end
+    return 0;
+}