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Image compression is a type of data compression applied to digital images, to reduce their cost for storage or transmission. Algorithms may take advantage of visual perception and the statistical properties of image data to provide superior results compared with generic data compression methods which are used for other digital data.
The ART format (file extension ".art") holds a single still image that has been highly compressed. The format was designed to facilitate the quick downloading of images, among other things. [ 1 ] Originally, the compression was developed by the Johnson-Grace Company , [ 2 ] which was then acquired by AOL. [ 3 ]
Up until the mid-2000s, it was widely published that the airbrush was invented in 1893, but following research undertaken in collaboration with New York University's Conservation Department, and personal support from Professor Margaret Holben Ellis, a more detailed history emerged, which required many authorities such as Oxford Art to update their dictionaries [1] and references.
Compression artifacts may intentionally be used as a visual style, sometimes known as "glitch art". Rosa Menkman's glitch art makes use of compression artifacts, [16] particularly the discrete cosine transform blocks (DCT blocks) found in most digital media data compression formats such as JPEG digital images and MP3 digital audio. [2]
ICER-3D is a compressor for hyperspectral images. Error-containment segments in ICER-3D are defined spatially (in the wavelet transform domain), similarly to JPEG 2000. The wavelet-transformed data are partitioned in much the same way as in ICER, except that in ICER-3D the segments extend through all spectral bands.
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If the frame contains areas where nothing has moved, the system can simply issue a short command that copies that part of the previous frame into the next one. If sections of the frame move in a simple manner, the compressor can emit a (slightly longer) command that tells the decompressor to shift, rotate, lighten, or darken the copy.
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