RAW

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Revision as of 10:30, 7 July 2005

RAW refers to a group of some hundred image formats proprietary to the respective camera manufacturers.

They all have in common that they contain the unprossesed data as it comes from the analog/digital (A/D) converter. This files need to be processed - at least interpolated, since the color information for most of them is located in different pixels - and converted to a common image format to be viewed or otherwise used. They might contain additional data comparable to the EXIF information.

There are numerous RAW converters but only few that can convert most or all RAW formats, most of them based on dcraw written by David J. Coffin. Most of them offer sophisticated ways to control white balance, tonal range, contrast, shadow detail, exposure etc. Some even allow for correction of chromatic aberration or noise.

(to be continued)

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