cvGetRectSubPix

Retrieves the pixel rectangle from an image with sub-pixel accuracy.

Name	Type	Range	Description
inImage	Image		Source image.
inPatchWidth	Integer	0 -	Width of the extracted patch.
inPatchHeight	Integer	0 -	Height of the extracted patch.
inCenter	Point2D		Floating point coordinates of the center of the extracted rectangle within the source image. The center must be inside the image.
inPatchType	Integer *		Depth of the extracted pixels. By default, they have the same depth as src.
outDst	Image		Extracted patch.

This filter can throw an exception to report error. Read how to deal with errors in Error Handling.

List of possible exceptions:

Error type	Description
DomainError	Input image must not be empty in cvGetRectSubPix.
DomainError	Only UInt8 and Real type pixel are supported in cvGetRectSubPix.

This filter is available on Basic Complexity Level.