[Kde-imaging] [Bug 146259] Raw Converter won't convert to 16bit PNG

[Martin Schmettow]

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http://bugs.kde.org/show_bug.cgi?id=146259         




------- Additional Comments From schmettow web de  2007-09-24 11:30 -------
Hi,

glad to hear from 16bit output into PNG, because may primary problem was to have 16bit AND full exif, which is now achieved. 

I have doubts, that automatically adjusting Gamma for 16bit makes sense from the perspective of pro workflow. People using 16bit usually do so because they want full control on the tonemapping, which means bringing the 12 bit from their camera sensor to printable 8bit (or so). In this case a auto conversion is counterproductive, obviously. 

On the other hand, it'll be nice for viewing 16bit photos to have digikam offer or choose a sensible correction. This has to happen without modifying the image and can be based on quite simple Gamme adustment.

Please have a look how this is solved in a simple but efficient way by the emerging HDR tool qtpfsgui.sourceforge.net : In the viewer dialogue the user can adjust the image display by selecting a gamma curve and by selecting a range in the histogram. This would be great to have for digikams editor. For the catalog 
and viewer I'd prefer a auto gamma adjustment.

Anyways, this would not affect dcraw, because from these arguments the author of dcraw is 100% correct in not offering 16bit other than linear.

Hope that helps.
Martin.