Enum RetrievalModes

mode of the contour retrieval algorithm

Namespace: OpenCvSharp

Assembly: OpenCvSharp.dll

Syntax

public enum RetrievalModes

Remarks

https://github.com/opencv/opencv/blob/d3bc563c6e01c2bc153f23e7393322a95c7d3974/modules/imgproc/include/opencv2/imgproc.hpp#L414

Fields

Name	Description
CComp	retrieves all of the contours and organizes them into a two-level hierarchy. At the top level, there are external boundaries of the components. At the second level, there are boundaries of the holes. If there is another contour inside a hole of a connected component, it is still put at the top level.
External	retrieves only the extreme outer contours. It sets hierarchy[i][2]=hierarchy[i][3]=-1 for all the contours.
FloodFill
List	retrieves all of the contours without establishing any hierarchical relationships.
Tree	retrieves all of the contours and reconstructs a full hierarchy of nested contours.