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Proceedings Paper

Using unbalanced operators to reduce loss of information during image enhancement
Author(s): Lloyd G. Allred; Gary E. Kelly
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Paper Abstract

Image processing operations involve replacing the color hue at a given pixel by computations involving the color values of surrounding pixels. Traditional image enhancement computations employ a 3 by 3 matrix manipulation involving a pixel and its eight neighboring pixels. Although some information loss results from any image processing technique, the use of a 3 by 3 operator typically results in a 50% loss of detail. This paper investigates unbalanced operators which do not seem to possess this deficiency. In particular, 2 by 2 operators can eliminate as much noise as 3 by 3 operators with less loss of detail. The enhanced image can be interpreted as a `balanced' operation with a 1/2 pixel shift of the original image for each operation performed. In four successive operations, a border 2 pixel band is lost on 2 edges of the image. In our applications, the loss of a few borer raster lines is insignificant when compared to a 50% loss of detail.

Paper Details

Date Published: 1 July 1992
PDF: 7 pages
Proc. SPIE 1702, Hybrid Image and Signal Processing III, (1 July 1992); doi: 10.1117/12.60571
Show Author Affiliations
Lloyd G. Allred, Air Force Ogden Air Logistics Ctr. (United States)
Gary E. Kelly, Air Force Ogden Air Logistics Ctr. (United States)


Published in SPIE Proceedings Vol. 1702:
Hybrid Image and Signal Processing III
David P. Casasent; Andrew G. Tescher, Editor(s)

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