When saving as DNG are the zeros removed by CHDK? Or are the raw data and badpixel.bin saved together leaving it up to the raw converter to remove the zeros?
I believe I read a post that said dcraw interpolates out zero'ed pixels from CRW but not DNG. Is that right?
If I use a dummy badpixel.bin will this prevent the removal of zero'ed pixels?
When a zero'ed pixel is near a hot pixel (not zero'ed) interpolation can smear the hot pixel when filling in the zero'ed pixel. This is why reyalp wrote rawconvert.
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