Add support for true in-place convolution to filter2D (Feature #3741)

Added by Goncalo Lopes almost 11 years ago. Updated over 9 years ago.

Status:	New	Start date:	2014-06-05
Priority:	Normal	Due date:
Assignee:	-	% Done:	0%
Category:	imgproc, video
Target version:	-
Difficulty:		Pull request:

Description

The documentation for filter2D claims that "in-place operation is supported.". However, this is not really the case, and OpenCV seems to create a temporary copy somewhere to serve as input to the filter. This is unfortunate, since it precludes the possibility of designing true IIR filters using this operator (where you want the previous output to affect the next input).

It would be nice to add a flag to allow specifying true in-place convolution.