I'd like to use ufraw-batch and choose a selected region ( maybe area of 10x10 pixels ) from RAW image to preselect manual whitebalance.
Looking at available command options of ufraw-batch it is only possible to select whitebalance via e.g. --temperature/--green options.
How to calculate those numbers ?
I tried to use output of earlier ufraw-batch run of the same image and RGB values from the generated TIFF image and feeding this values to RGB_to_Temperature() function taken from original ufraw implementation.
But the resulting numbers (temperature/green) don't match with what I get when using the pick-tool in ufraw in the same area of the RAW image.
Obviously because ufraw-batch already applied some kind of whitebalance in the first place and using the output TIFF step is plain wrong.
Is it possible to run ufraw-batch without any whitebalance at all to get an image from which I can extract pixels afterwards ?
Any other possible way to use ufraw-batch and select image region for whitebalance control ?
kind regards
Manuel
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I'd like to use ufraw-batch and choose a selected region ( maybe area of 10x10 pixels ) from RAW image to preselect manual whitebalance.
Looking at available command options of ufraw-batch it is only possible to select whitebalance via e.g. --temperature/--green options.
How to calculate those numbers ?
I tried to use output of earlier ufraw-batch run of the same image and RGB values from the generated TIFF image and feeding this values to RGB_to_Temperature() function taken from original ufraw implementation.
But the resulting numbers (temperature/green) don't match with what I get when using the pick-tool in ufraw in the same area of the RAW image.
Obviously because ufraw-batch already applied some kind of whitebalance in the first place and using the output TIFF step is plain wrong.
Is it possible to run ufraw-batch without any whitebalance at all to get an image from which I can extract pixels afterwards ?
Any other possible way to use ufraw-batch and select image region for whitebalance control ?
kind regards
Manuel