Re: Border Replication for Filters

Subject: Re: Border Replication for Filters

From: Troy Koelling <email@hidden>

Date: Fri, 9 May 2008 11:25:12 -0700

Delivered-to: email@hidden

Hi Mike,

You can use Affine Clamp, or any of the "Reflected Tile" patches that come up when you search. Be sure to crop the output, because it certainly will make it infinite. The black borders on the Gaussian blur are from the image actually getting larger, so you may be able to accomplish what you want by simply cropping the original image.

Hope that helps,

Troy

On May 8, 2008, at 1:08 AM, Mike Lewis wrote:

Hi,

I'm applying a large gaussian blur to an image and was wondering if there's a way to not have the black border appear (even after being cropped). In matlab I'd just use the border replication option in imfilter (http://www.mathworks.com/access/helpdesk_r13/help/toolbox/images/linfilt6.html). Is there a way to copy and flip an image 8 times (one for each side, and 1 for each corner), or is there a more straightforward way in quartz?

Thanks,
Mike Lewis

--
Michael Lewis
lolrus.org
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References:

>Border Replication for Filters (From: "Mike Lewis" <email@hidden>)