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Evaluation of multichannel Wiener filters applied to fine resolution passive microwave images of first-year sea iceThe effectivity of multichannel Wiener filters to improve images obtained with passive microwave systems was investigated by applying Wiener filters to passive microwave images of first-year sea ice. Four major parameters which define the filter were varied: the lag or pixel offset between the original and the desired scenes, filter length, the number of lines in the filter, and the weight applied to the empirical correlation functions. The effect of each variable on the image quality was assessed by visually comparing the results. It was found that the application of multichannel Wiener theory to passive microwave images of first-year sea ice resulted in visually sharper images with enhanced textural features and less high-frequency noise. However, Wiener filters induced a slight blocky grain to the image and could produce a type of ringing along scan lines traversing sharp intensity contrasts.
Document ID
19930048929
Document Type
Reprint (Version printed in journal)
Authors
Full, William E. (Wichita State Univ. KS, United States)
Eppler, Duane T. (U.S. Navy, Naval Oceanographic and Atmospheric Research Lab. Hanover, NH, United States)
Date Acquired
August 16, 2013
Publication Date
April 1, 1993
Publication Information
Publication: Remote Sensing of Environment
Volume: 44
Issue: 1
ISSN: 0034-4257
Subject Category
OCEANOGRAPHY
Distribution Limits
Public
Copyright
Other