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Peer group image enhancement
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DOI：10.1109/83.902298.png)
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摘要
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Peer group image processing identifies peer group for each pixel and then replaces the pixel intensity with the average over the peer group. Two parameters provide direct control over which image features are selectively enhanced: area (number of pixels in the feature) and window diameter (window size needed to enclose the feature). A discussion is given of how these parameters determine which features in the image are smoothed or preserved. We show that the Fisher discriminant can be used to automatically adjust the PGA parameters at each point in the image. This local parameter selection allows smoothing over uniform regions while preserving features like corners and edges. This adaptive procedure extends to multilevel and color forms of PGA, Comparisons are made with a variety of standard filtering techniques and an analysis is given of computational complexity and convergence issues.
Keyword:
image enhancement
image smoothing
noise removal
nonlinear filtering
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期刊
IF:
13.7
论文数:
1.0W
被引数:
8.4W
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