Image analysis – Image enhancement or restoration – Image filter
Reexamination Certificate
2005-12-27
2005-12-27
Johns, Andrew W. (Department: 2621)
Image analysis
Image enhancement or restoration
Image filter
C382S262000, C382S263000, C382S264000
Reexamination Certificate
active
06980696
ABSTRACT:
A method of deriving from an existing selective image smoothing filter either a corresponding filter for selective image sharpening, or a corresponding filter for both selective image smoothing and selective image sharpening. The selective sharpening filter can be implemented quickly by using implementations of the existing selective smoothing filter and a derived matching non-selective smoothing filter as black boxes and combining their outputs in a simple manner. Alternatively, the derived selective sharpening filter can be implemented by inlining the combination of the implementations of the existing selective smoothing.
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Andrea Polesel et al; “Image Enhancement via Adaptive Unsharp Masking” IEEE Transactions on Image Processing, vol. 9, No. 3, Mar. 2000 pp. 505-510.
Edwards Patrick L.
Hewlett--Packard Development Company, L.P.
Johns Andrew W.
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