NDLI: Partition-based vector filtering technique for suppression of noise in digital color images

Content Provider	IEEE Xplore Digital Library
Author	Zhonghua Ma Hong Ren Wu Dagan Feng
Copyright Year	1992
Abstract	A partition-based adaptive vector filter is proposed for the restoration of corrupted digital color images. The novelty of the filter lies in its unique three-stage adaptive estimation. The local image structure is first estimated by a series of center-weighted reference filters. Then the distances between the observed central pixel and estimated references are utilized to classify the local inputs into one of preset structure partition cells. Finally, a weighted filtering operation, indexed by the partition cell, is applied to the estimated references in order to restore the central pixel value. The weighted filtering operation is optimized off-line for each partition cell to achieve the best tradeoff between noise suppression and structure preservation. Recursive filtering operation and recursive weight training are also investigated to further boost the restoration performance. The proposed filter has demonstrated satisfactory results in suppressing many distinct types of noise in natural color images. Noticeable performance gains are demonstrated over other prior-art methods in terms of standard objective measurements, the visual image quality and the computational complexity.
Sponsorship	IEEE Signal Processing Society
Page Count	19
File Size	4495631
Starting Page	2324
Ending Page	2342
File Format	PDF
ISSN	10577149
Volume Number	15
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Digital filters Filtering Colored noise Color Image restoration Adaptive filters Adaptive estimation Performance gain Measurement standards Gain measurement partition-based adaptive vector (PBTVM) filter Center-weighted vector median (CWVM) filter constrained least mean-square (LMS) algorithm digital color image restoration
Content Type	Text
Resource Type	Article
Subject	Computer Graphics and Computer-Aided Design Software

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