The RAW files from CHDK are a 10-bit format, non-standard. Few programs deal with them well. Read the CHDK FAQ: RAW Files for info on the many ways that you can read and use CHDK RAW files. Personally, I use PhotoLine for my primary editor. It reads all of CHDK's RAW files from all supported cameras just fine with no conversions necessary. It's also a much better editor than PhotoShop.
Quote from: hydrogen on 10 / December / 2007, 18:57:05Is this 10-bit format a limitation of CHDK or the camera hardware?The limitation of the camera hardware. It's not such a limit when you do the math. Instead of 16,777,216 (16.7 million) colors of JPG files (8-bit RGB data, 256^3), you get 1,099,511,627,776 (1.1 trillion) possible shades and hues out of the RAW file (10-bit RGBG data, 1024^4.) You need more than that?
Is this 10-bit format a limitation of CHDK or the camera hardware?
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RAW Shooting and Processing
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