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Editorial Team
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Asked: 2026-05-24T05:19:43+00:00

I’m writing some code to test if a point is inside the contour of

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I’m writing some code to test if a point is inside the contour of a polygon.
I have started writing my own code but i see this function is defined. The problem is I don’t understand why the contour is a Mat. I have the contour of the polygon into a vector of CvPoint.

Function declaration:
double pointPolygonTest(const Mat& contour, Point2f pt, bool measureDist)

Anyone have an example of how to work with this function or know how to convert a vector of CvPoint to a const Mat& contour

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1 Answer

  1. Editorial Team

    The documentation shows the first argument as an array: double pointPolygonTest(InputArray contour, Point2f pt, bool measureDist). The sample code in samples/cpp/tutorial_code/ShapeDescriptors/pointPolygonTest_demo.cpp passes a vector of Point vectors.

    Perhaps you’re looking at outdated documentation?

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