+1  A: 

There are some quirks with scaling with CIImage. Will this post by Dan Wood help?

Diederik Hoogenboom  2010-02-05 11:34:39
yeah, i've tried this, but it is something different. I'm not sure why i'm getting green net over the sunset in jpeg.
 2010-02-05 13:16:34
A: 

That's definitely a CoreImage bug. File it at bugreport.apple.com

NSResponder  2010-02-05 13:38:12
mm..well, probably. i'll try. But it won't solve my issue :)
 2010-02-05 13:41:08
+1  A: 

My understanding is that due to its nature, the hardware Core Image renderer has some odd quirks when rendering for anything but on-screen display. So, you are recommended to use the software renderer for other situations.

http://developer.apple.com/mac/library/qa/qa2005/qa1416.html

Mike Abdullah  2010-02-05 16:38:09

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