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Structural Analysis and Shape Descriptors
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| Icon | Name | Description / Applications | Modules | |
|---|---|---|---|---|
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cvApproxPolyDP | 
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Approximates polygonal curve(s) with the specified precision. |
OpenCV |
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cvArcLength |
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Calculates a contour perimeter or a curve length. |
OpenCV |
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cvBoundingRect |
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Calculates the up-right bounding rectangle of a point set. |
OpenCV |
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cvConnectedComponents |
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Computes the connected components labeled image of boolean image. |
OpenCV |
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cvConnectedComponentsWithStats |
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Computes the connected components labeled image of boolean image and also produces a statistics output for each label |
OpenCV |
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cvContourArea |
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Calculates the contour area. |
OpenCV |
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cvConvexHull |
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Finds the convex hull of a point set. |
OpenCV |
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cvDrawContours |
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Draws contour outlines or filled contours. |
OpenCV |
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cvFindContours |
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Finds the contours in a binary image. |
OpenCV |
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cvFitEllipse |
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Fits an ellipse around a set of 2D points. |
OpenCV |
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cvFitEllipseAMS |
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Fits an ellipse around a set of 2D points. |
OpenCV |
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cvFitEllipseDirect |
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Fits an ellipse around a set of 2D points. |
OpenCV |
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cvFitLine |
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Fits a line to a 2D or 3D point set. |
OpenCV |
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cvGeneralizedHoughBallard_Detection |
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Finds arbitrary template in the grayscale image using Generalized Hough Transform. |
OpenCV |
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cvGeneralizedHoughBallard_Initialization |
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Finds arbitrary template in the grayscale image using Generalized Hough Transform. |
OpenCV |
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cvGeneralizedHoughGuil_Detection |
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Finds arbitrary template in the grayscale image using Generalized Hough Transform. |
OpenCV |
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cvGeneralizedHoughGuil_Initialization |
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Finds arbitrary template in the grayscale image using Generalized Hough Transform. |
OpenCV |
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cvHuMoments |
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Calculates Hu moments of the image. |
OpenCV |
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cvIntersectConvexConvex |
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Finds intersection of two convex polygons. |
OpenCV |
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cvIsContourConvex |
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Tests contour convexity. |
OpenCV |
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cvMatchShapes_Images |
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Compares two shapes. |
OpenCV |
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cvMatchShapes_Polygon |
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Compares two shapes. |
OpenCV |
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cvMinAreaRect |
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Finds a rotated rectangle of the minimum area enclosing the input 2D point set. |
OpenCV |
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cvMinEnclosingCircle |
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Finds the minimum area circle enclosing a 2D point set. |
OpenCV |
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cvMinEnclosingTriangle |
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Finds a rotated triangle of the minimum area enclosing the input 2D point set. |
OpenCV |
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cvMoments |
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Calculates image moments. |
OpenCV |
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cvPointPolygonTest |
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Performs point-in-contour test. |
OpenCV |