
5.7 Error-Free Compression
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4x4,
the "blocky" appearance is not readily visible when the image recon-
structed from the compressed data is displayed with no magnification. This
artifact can be made more apparent with magnification, as is illustrated in
Fig. 22 for the "northwest" segment of the airport in Fig. 21b.
5.7 ERROR-FREE COMPRESSION
In many applications, such as computerized tomography and LANDSAT
imagery, where an enormous amount of image data is constantly produced
for archival storage, legal and other reasons usually dictate that no informa-
tion be lost during the process of image compression. Although with error-
free technique ...