How does colfilt work ? Is there any mathematical explanation how it work ?
6 views (last 30 days)
Show older comments
Hi Guys,
I wanted to understand the working of colfilt. When we provide the block size and function (ex.colfilt(img,[3 3],'fun');) does it make overlapping boxes if not how does the output image is of same size. If there is any document wherer I can find the mathematical explanation ?.
I will really appreciate for your help.
Thanks
0 Comments
Answers (1)
Image Analyst
on 10 Jan 2017
I agree it's confusing, so maybe that's why I've never found a need to use it. Supposedly it can make processing faster but since typical operations I do on an image take like a second or less, time has never been something I've worried about.
It looks like it has a 'distinct' (jumping by several pixels) option and a 'sliding' (move by 1 pixel) option.
2 Comments
Image Analyst
on 11 Jan 2017
No, it doesn't do convolution. imfilter() is more like that (except imfilter doesn't flip the kernel like conv2 does). colorfilt() applies the function you supply, so it's more like nlfilter().
See Also
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!