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Re: Processing large images with CI / QC without loss of data ?




On 19.08.2005, at 09:41, Pierre-Olivier Latour wrote:

I just noticed that images are resized according to available texture memory,
i.e. 2048 x 2048 before being passed into QC.


This kind of breaks my application - I would like to use Compositions to postprocess
Digital Camera images at full resolution, allowing the user to save the final image.


Is there any way around that limitation, if at a performance penalty ?
(I could use the smaller image for display, the larger for saving)



You could pass a smaller version of the image for preview and when rendering, tile the image and pass the tiles one by one to QC.

Hmm. That would work for color correction and the likes but could as far as I understand lead to artifacts when using filters that work on neighbouring pixels.

While one could get around that by using larger tiles and removing the overlap
I think it would be nice to have API that either encapsulates such action
(whatever the optimized technique to do it may be on a certain platform)
in the future.


I think most applications that work on still images will have this problem
and I'd be interested to here other list members opinions before I file
a report about it.


Kind regards, Bjoern



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References: 
 >Processing large images with CI / QC without loss of data ? (From: Bjoern Kriews <email@hidden>)
 >Re: Processing large images with CI / QC without loss of data ? (From: Pierre-Olivier Latour <email@hidden>)



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