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Structural Analysis and Shape Descriptors

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Icon Name Description Modules
cvApproxPolyDP Approximates polygonal curve(s) with the specified precision. OpenCV
cvArcLength Calculates a contour perimeter or a curve length. OpenCV
cvBoundingRect Calculates the up-right bounding rectangle of a point set. OpenCV
cvConnectedComponents Computes the connected components labeled image of boolean image. OpenCV
cvContourArea Calculates the contour area. OpenCV
cvConvexHull Finds the convex hull of a point set. OpenCV
cvDrawContours Draws contour outlines or filled contours. OpenCV
cvFindContours Finds the contours in a binary image. OpenCV
cvFitEllipse Fits an ellipse around a set of 2D points. OpenCV
cvFitLine Fits a line to a 2D or 3D point set. OpenCV
cvHuMoments Calculates Hu moments of the image. OpenCV
cvIsContourConvex Tests contour convexity. OpenCV
cvMatchShapes_Images Compares two shapes. OpenCV
cvMatchShapes_Polygon Compares two shapes. OpenCV
cvMinAreaRect Finds a rotated rectangle of the minimum area enclosing the input 2D point set. OpenCV
cvMinEnclosingCircle Finds the minimum area circle enclosing a 2D point set. OpenCV
cvMinEnclosingTriangle Finds a rotated rectangle of the minimum area enclosing the input 2D point set. OpenCV
cvMoments Calculates image moments. OpenCV
cvPointPolygonTest Performs point-in-contour test. OpenCV