Digital Camera Photo Format Summary

April 5, 2011 - PRLog -- RAW format: photo storage format, corresponding to the file name suffix is ​​*. jpg, *. tif, original records digital camera RAW formats as well, strictly speaking, not a RAW image format, you can not directly edit, RAW is the camera's CCD or CMOS optical signals in the raw data is converted to electrical signal recorded, simply record a digital camera without any treatment within the image data, its stored. RAW is untreated, and uncompressed formats, RAW can be conceptualized as the "original image encoded data" or more images as "digital negative," compared to "negative," because I want to through the "film" was Picture Perfect, is the need to post "electronic darkroom" work support.

RAW format like TIFF, is a "lossless" data format, for the 500 million pixel digital camera, a RAW file contains 5 million points of light-sensitive data. RAW format is unprocessed data, as we use JPEG, TIFF and other files are in RAW format digital camera based on the adjustment of parameters such as white balance and saturation, the resulting image data.

JPEG image format: extension is JPG, its wholly-called Joint Photograhic Experts Group. JPEG is an excellent image quality can provide a file compression format, JPEG format is set to photos taken in-camera processing has been completed through the image processor, can the film. And in most digital cameras, JPEG is a storage format to be believed.

Although JPEG is a lossy compression format, under normal circumstances, JPEG has many advantages worthy of consideration, JPEG to obtain an image data by removing redundant data and reduce the size of its store, but lost in the compression process the original image The part of the data can not be restored, usually in the 10:1 to 40:1 compression ratio between the JPEG can be saved so that a large portion of memory card space, thus greatly increasing the number of pictures taken, and to accelerate the photo storage speed, while also speeding up with the continuous shooting speed, so it is widely used for news photography. So many benefits, for most people and ordinary families, low compression rates (high quality) of the JPEG file is a good choice.

Flash Pix Format: Flash Pix by Kodak, INTEL and other companies jointly developed a image storage mode (. FPX), Kodak is widely used in compact digital cameras, compared with other formats, the format of the image in support of the Flash Pix image processing software, has shown fast copy fast, fast transmission, the advantages of fast processing, the format also records the shutter speed, exposure, white balance adjustment and other information. In some digital cameras, to Flash Pix format to store images, you can also choose whether to use JPEG compression.

TIFF format:: extended name is the TIF, the full name is Tagged Image File Format. TIFF is a lossless compression format (up to 2-3 times the compression ratio.) This compression is the compression of document itself, that is some duplication of information in the file uses a special way, the file can be completely restored to maintain the level of color and the original plan, the advantage is better image quality, compatibility than RAW format high, but occupy a large space. TIFF (. TIF) is a lossless compression file format, does not break any image data, image quality will not deteriorate, but the compression ratio is very small, only 2:1, this compression is only seen in the more upscale digital camera, Kodak DCS 520, DCS 560, DCS620, DCS660, Canon EOS D2000, EOS D6000, and other professional digital camera image files stored, have adopted the format.

GIF format: GIF image file format is interchangeable in English acronym for Graphics Interchange Fotmat out, GIF file format is the most common Web page graphics file formats, so there are very few low-pixel digital camera image files can be the format.

MPEG formats: MPEG (Motion Picture Expert Group) video compression standard is the active video, VCD, DVD, respectively, using one of the MPEG-1, MPEG-2 standard, this standard was both a very small number of digital cameras with video capabilities, a digital the camera is stored in the format recording, the recorded image can be dynamically broadcast.

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