White Balance - Before or After Bayer Demosaicing?

Started 2 months ago | Questions thread
isks Forum Member • Posts: 63
Re: White Balance - Before or After Bayer Demosaicing?

xpatUSA wrote:

Is there a Standard?

Failing that, is there a norm?

Which is "best"?

TIA ...

Reading through the DNG SDK (which should be a fairly close match to how Adobe Camera Raw processes RAWs), white balance is applied when converting the demosaiced RAW into the ProPhoto RGB space for further processing: the function in question (RefBaselineABCtoRGB()) takes a camera white coordinate in RAW signals and a color conversion matrix and produces an RGB image.

I'd imagine other RAW converters would do something similar: demosaicing is essentially a local operation.

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