A data compression process that makes subsequent complete recovery of the original data impossible. This approach is commonly used for still- or motion-images where the recovered image must only be subjectively acceptable. Algorithm examples include JPEG, MPEG1, MPEG2, MPEG4, H.261 and H.263. Note that lossy compression can provide significantly greater compression than lossless compression techniques. See also Cosine Transform.
Lossy compression is a compression scheme that emphasizes producing a small picture file, even at the cost of picture quality. Lossy compression can produce smaller picture files than lossless compression; however, when you uncompress the picture, some of the original picture data is lost and cannot be recovered.
Method of file compression that causes an image to lose it's quality, and is not capable of returning it back to it's original quality.
A file compression type that reduces the size of the file, but, in the process, degrades the image. The image data cannot be restored to its original quality.
scheme of organizing information in a more compact form where some information is lost to gain higher levels of compaction
A file compression scheme that reduces the size of a file but degrades it in the process so it can't be restored to its original quality.
1. (Video and multimedia) Bit-rate reduction of an image signal by powerful algorithms that compress beyond what is achievable in lossless compression, or quasi-lossless compression. It accepts loss of information and introduction of artifacts which can be ignored as unimportant when viewed in direct comparison with the original. Advantage is taken of the subtended viewing angle for the intended display, the perceptual characteristics of human vision, the statistics of image populations, and the objectives of the display. 2. The lost information cannot be regenerated from the compressed bit-stream.
digitized video which, to save space, does NOT contain all the original video information.