I have to upscale JPEG images from 72DPI to, say 250DPI (user-
selectable). I figured Core Image would be the way to go, but...
The CI docs for CILanczosScaleTransform say "You typically use this
filter to scale down an image"; well, I will be needing to scale the
image UP. What filter is appropriate for that? CIAffineTransform?
"You can scale...the input image." Will that give me a high-quality
scaling?
When I do a similar operation in Photoshop (Image -> Image Size,
Resolution), it offers to resample the image, and offers "Bicubic
Smoother" as being "best for enlargement". What's the Cocoa/CI
equivalent to that?
Thanks!
randy
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