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lossy compression

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.04 sec.
los´sy com`pres´sion
n.1.(Computers) The compression of binary data into a form which, when it is re-expanded, has most, but not all, of the original information. It is used primarily for compression of images and sounds, and is designed to provide a high degree of compression at the cost of a slight loss of data. It is expemplified by the JPEG compression standard. Images compressed by a lossy compression algorithm are re-expanded into an image close, but not identical to the original image; the difference between the original and the reconstructed image may be imperceptible to normal viewing by the eye.


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Both lossless and lossy compression can be found in software, drivers, firmware, and in some cases even ASICs.
Heartlab's new compression-on-demand technology delivers over 10 different levels of lossless and lossy compression on the fly directly from the original images in the DICOM archive.
Lossy compression techniques, however, offer much more compact compression, and when properly used, do not introduce visible artifacts, even though the data is not preserved in exact form.
 
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