Image file format: Difference between revisions

Revision as of 20:14, 7 October 2005

Revision as of 20:17, 7 October 2005

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===JPEG ===

'''The [[JPEG]] (Joint Photographic Experts Group)''' image files are a lossy format.. The standard filename extension is JPG, although it may occasionally be seen as JPEG. Nearly all digital cameras have the option to save images in JPEG format, some at different compression levels, such as “fine” and “standard.” The JPEG format supports full color and produces relatively small file sizes. Fortunately, the compression in most cases does not distract noticeably from the image. But, JPEG files do suffer generational degradation when repeatedly edited and saved. These files are best kept in original form. Because of the compression algorithm “artifacts” (blemishes) sometime appear.

===TIFF===

'''The [[TIFF]] (Tagged Image File Format)''' image files are a lossless format. The filename extension is TIF. Some digital cameras have the option to save images in the TIFF format. These files use the [[LZW]] compression algorithm which results in lossless files. Because no image data is lost, this format is used when the ultimate in image quality is desired. Another advantage of TIFF files is that they suffer no generation degradation during file manipulation. The TIFF files support 32-bit color depth (true color). The TIFF files sizes are larger that the JPEG file sizes, because JPEG takes advantage of its lossy compression. The TIFF image format is not widely supported by web browsers, and should not be used on the Internet.