Computer Science – Performance
Scientific paper
Jan 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991josaa...8..141m&link_type=abstract
Journal of the Optical Society of America A, Vol. 8, No. 1, p. 141 - 156
Computer Science
Performance
Scientific paper
Most of the adaptive processes that have been proposed for image enhancement or data compression rely on some form of two-step mechanism characterized by an estimation of the local structure of the image, followed by an appropriately tuned filter to perform the desired operation. A variety of techniques have been used to perform the spatial adaptation. The authors review the major methods used for spatial activity indication to determine whether there is any particular method that provides superior performance. They present 14 methods of spatial adaptation and compare their performance in the presence of noise for both synthetic test images and real gray-level images. The authors conclude that the most effective indicator functions are those that include some implicit low-pass filtering to suppress random fluctuations and that are based on some form of gradient estimation.
Jernigan M. E.
McLean Gerard F.
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