Re: Kernel Convolution...
Re: Kernel Convolution...
- Subject: Re: Kernel Convolution...
- From: "John C. Randolph" <email@hidden>
- Date: Mon, 3 Jun 2002 10:57:21 -0700
On Saturday, June 1, 2002, at 08:24 PM, Jeff LaMarche wrote:
In QuickTime, there are some provided functions for doing
kernel convolutions,
and some pre-sets for some more common ones (blur, sharpen,
etc). I was about
to set out to write a framework to do kernel convolutions on
NSImages because
I haven't been able to find anything in the documentation to
indicate that
this functionality exists in the code delivered from Apple, but
before I started
I thought I'd throw it in here, because I have been known to
miss things in
the Cocoa Documentation =) and I wouldn't want to reinvent the wheel.
You would be re-inventing the wheel, but this particular wheel
is not present in NSBitmapImageRep, or in CoreGraphics :-(
It really is the sort of thing we should include in the kit
IMHO, but I don't know where it lands in the list...
It would be *really* nice if you implemented AltiVec 3x3
convolutions. How about HistEQ and stretch while you're at it?
-jcr
John C. Randolph <email@hidden> (408) 974-8819
Sr. Cocoa Software Engineer,
Apple Worldwide Developer Relations
http://developer.apple.com/cocoa/index.html
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