cv::sepFilter2D in one dimension?

asked 2018-08-21 03:51:48 -0600

enxdtw
56 ●2 ●6

Hi,

Can sepFilter2D also just do a filter in X or Y but not in both. It would be useful if it could (think the law texture kernels).

Cheers

Dave

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answered 2018-08-22 06:32:55 -0600

kbarni

4134 ●1 ●13 ●49

AFAIK there is no 1D convolution filter (horizontal or vertical) in OpenCV.

However it is easy to implement using three for loops (two to go through the pixels, one for the sum of the products).

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Sure, I did it myself, but with OpenCV there would be some optimisation, boundary handling, maybe GPU implementation, plus it's a pretty obvious missing feature.

enxdtw ( 2018-08-22 10:32:04 -0600 )edit

there was a FilterEngine, with row and col filters, but it was removed from the public api (to enable more gpu optimizations, i guess)

berak ( 2018-08-25 01:35:25 -0600 )edit

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Asked: 2018-08-21 03:51:48 -0600

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Last updated: Aug 22 '18

cv::sepFilter2D in one dimension? edit