MATLAB Central Newsreader - Prewitt Kernel Size?

Prewitt Kernel Size?

David Doria — Wed, 26 Mar 2008 15:21:02 -0400

When I use edge(img, 'Prewitt', [], 'vertical'), how big is
the filter that matlab uses? it doesn't seem to say anything
about that in the documentation?

Thanks,

David

Re: Prewitt Kernel Size?

Ashish Uthama — Thu, 27 Mar 2008 21:32:09 -0400

Look at line 371 of edge.m

> fspecial('prewitt')/6

ans =3D

     0.1667 0.1667 0.1667
          0 0 0
    -0.1667 -0.1667 -0.1667

Agreed, its not clear from the doc.

I love the fact that MATLAB ships the m-code for most of its toolboxes.
Do make the best of it.

On Wed, 26 Mar 2008 11:21:02 -0400, David Doria <daviddoria@gmail.com> =

wrote:

> When I use edge(img, 'Prewitt', [], 'vertical'), how big is
> the filter that matlab uses? it doesn't seem to say anything
> about that in the documentation?
>
> Thanks,
>
> David

Re: Prewitt Kernel Size?

David Doria — Thu, 27 Mar 2008 22:45:04 -0400

ah cool, i didn't look in the code

maybe something to add to the documentation next release!