RAW refers to raw image formats that are available on some digital cameras, rather than to a specific format. These formats usually use a lossless or nearly lossless compression, and produce file sizes smaller than the TIFF formats. Although there is a standard raw image format, (ISO 12234-2, TIFF/EP), the raw formats used by most cameras are not standardized or documented, and differ among camera manufacturers.
Most camera manufacturers have their own software for decoding or developing their raw file format, but there are also many third party raw file converter applications available that accept raw files from most digital cameras. Some graphic programs and image editors may not accept some or all raw file formats, and some older ones have been effectively orphaned already.
Adobe's Digital Negative (DNG) specification is an attempt at standardizing a raw image format to be used by cameras, or for archival storage of image data converted from undocumented raw image formats, and is used by several niche and minority camera manufacturers including Pentax, Leica, and Samsung. The raw image formats of more than 230 camera models, including those from manufacturers with the largest market shares such as Canon, Nikon, Phase One, Sony, and Olympus, can be converted to DNG. DNG was based on ISO 12234-2, TIFF/EP, and ISO's revision of TIFF/EP is reported to be adding Adobe's modifications and developments made for DNG into profile 2 of the new version of the standard.
As far as videocameras are concerned, ARRI's Arriflex D-20 and D-21 cameras provide raw 3K-resolution sensor data with Bayer pattern as still images (one per frame) in a proprietary format (
.ari file extension). Red Digital Cinema Camera Company, with its Mysterium sensor family of still and video cameras, uses its proprietary raw format called REDCODE (
.R3D extension), which stores still as well as audio+video information in one lossy-compressed file.
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Famous quotes containing the word raw:
“In how few words, for instance, the Greeks would have told the story of Abelard and Heloise, making but a sentence of our classical dictionary.... We moderns, on the other hand, collect only the raw materials of biography and history, memoirs to serve for a history, which is but materials to serve for a mythology.”
—Henry David Thoreau (18171862)
“Knowledge in the form of an informational commodity indispensable to productive power is already, and will continue to be, a majorperhaps the majorstake in the worldwide competition for power. It is conceivable that the nation-states will one day fight for control of information, just as they battled in the past for control over territory, and afterwards for control over access to and exploitation of raw materials and cheap labor.”
—Jean François Lyotard (b. 1924)
“I reverently believe that the Maker who made us all makes everything in New England but the weather. I dont know who makes that, but I think it must be raw apprentices in the weather-clerks factory who experiment and learn how.... In the spring I have counted one hundred and thirty-six different kinds of weather inside of four-and-twenty hours.”
—Mark Twain [Samuel Langhorne Clemens] (18351910)