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An information theory of image gatheringShannon's mathematical theory of communication is extended to image gathering. Expressions are obtained for the total information that is received with a single image-gathering channel and with parallel channels. It is concluded that the aliased signal components carry information even though these components interfere with the within-passband components in conventional image gathering and restoration, thereby degrading the fidelity and visual quality of the restored image. An examination of the expression for minimum mean-square-error, or Wiener-matrix, restoration from parallel image-gathering channels reveals a method for unscrambling the within-passband and aliased signal components to restore spatial frequencies beyond the sampling passband out to the spatial frequency response cutoff of the optical aperture.
Document ID
19910068975
Document Type
Reprint (Version printed in journal)
Authors
Fales, Carl L. (NASA Langley Research Center Hampton, VA, United States)
Huck, Friedrich O. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Information Sciences
Volume: 57-58
ISSN: 0020-0255
Subject Category
CYBERNETICS
Distribution Limits
Public
Copyright
Other