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Old 16th February 2012, 11:55   #1  |  Link
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Join Date: Dec 2007
Posts: 17
RAW like recovering highlight detail beyond clipping

I'm working on Magic Lantern to add in camera functionality to Canon DSLRs. It's is mostly aimed at the video side of the cameras

Currently we are working on a way to record full RGB information. Normally RGB highlight information is discarded at the point where the first channel clips. This is usually Green. Red and Blue are less sensitive to clipping and can contain detail up to 1EV extra. With the new feature, highlights tend to turn pink because only red and blue are registered.

With RAW photo's it's normal to register full RGB information and RAW converters have smart ways of interpolating missing color data or desaturate the pink to grey. We like to do this color conversion with avisynth and want to ask you guys to come up with a valid script.

here is the discussion thread and sample picture:VRAM25.tif

possible workflows:
- mask the beyond clipping highlights and desaturate them
- try to recreate missing color info out of the information that exists in the remaining channels.

Last edited by PALpilot; 16th February 2012 at 12:28.
PALpilot is offline   Reply With Quote

canon, clipping, dslr, highlight, raw

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