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Merge pull request #29225 from asmorkalov:as/more_contours_geometry

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Move more 2d funcs to geometry module.
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Alexander Smorkalov
2026-06-04 12:20:06 +03:00
committed by GitHub
parent fc3803c67b 9803eb0443
commit 6a66ec4df5
14 changed files with 398 additions and 394 deletions
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modules/geometry/include/opencv2/geometry/2d.hpp
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@@ -806,6 +806,56 @@ CV_EXPORTS_W double pointPolygonTest( InputArray contour, Point2f pt, bool measu
*/
CV_EXPORTS_W int rotatedRectangleIntersection( const RotatedRect& rect1, const RotatedRect& rect2, OutputArray intersectingRegion );
/** @brief Calculates a contour perimeter or a curve length.
*
* The function computes a curve length or a closed contour perimeter.
*
* @param curve Input vector of 2D points, stored in std::vector or Mat.
* @param closed Flag indicating whether the curve is closed or not.
*/
CV_EXPORTS_W double arcLength( InputArray curve, bool closed );
/** @brief Calculates a contour area.
*
* The function computes a contour area. Similarly to moments , the area is computed using the Green
* formula. Thus, the returned area and the number of non-zero pixels, if you draw the contour using
* #drawContours or #fillPoly , can be different. Also, the function will most certainly give a wrong
* results for contours with self-intersections.
*
* Example:
* @code
* vector<Point> contour;
* contour.push_back(Point2f(0, 0));
* contour.push_back(Point2f(10, 0));
* contour.push_back(Point2f(10, 10));
* contour.push_back(Point2f(5, 4));
*
* double area0 = contourArea(contour);
* vector<Point> approx;
* approxPolyDP(contour, approx, 5, true);
* double area1 = contourArea(approx);
*
* cout << "area0 =" << area0 << endl <<
* "area1 =" << area1 << endl <<
* "approx poly vertices" << approx.size() << endl;
* @endcode
* @param contour Input vector of 2D points (contour vertices), stored in std::vector or Mat.
* @param oriented Oriented area flag. If it is true, the function returns a signed area value,
* depending on the contour orientation (clockwise or counter-clockwise). Using this feature you can
* determine orientation of a contour by taking the sign of an area. By default, the parameter is
* false, which means that the absolute value is returned.
*/
CV_EXPORTS_W double contourArea( InputArray contour, bool oriented = false );
/** @brief Calculates the up-right bounding rectangle of a point set or non-zero pixels of gray-scale image.
*
* The function calculates and returns the minimal up-right bounding rectangle for the specified point set or
* non-zero pixels of gray-scale image.
*
* @param array Input gray-scale image or 2D point set, stored in std::vector or Mat.
*/
CV_EXPORTS_W Rect boundingRect( InputArray array );
} // namespace cv
#endif // OPENCV_2D_HPP