Raw image files are sometimes incorrectly described as "digital negatives".
There are dozens of raw formats in use by different manufacturers of digital image capture equipment. Normally, the image is processed by a raw converter, in a wide- gamut internal color space where precise adjustments can be made before conversion to a viewable file format such as JPEG or PNG for storage, printing, or further manipulation. Raw files are so named because they are not yet processed, and contain large amounts of potentially redundant data.
A camera raw image file contains unprocessed or minimally processed data from the image sensor of either a digital camera, a motion picture film scanner, or other image scanner.
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