Using unbalanced operators to reduce loss of information during image enhancement

Lloyd G. Allred; Gary E. Kelly

doi:10.1117/12.60571

1 July 1992 Using unbalanced operators to reduce loss of information during image enhancement

Lloyd G. Allred, Gary E. Kelly

Proceedings Volume 1702, Hybrid Image and Signal Processing III; (1992) https://doi.org/10.1117/12.60571
Event: Aerospace Sensing, 1992, Orlando, FL, United States

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.

Citation Download Citation

Lloyd G. Allred and Gary E. Kelly "Using unbalanced operators to reduce loss of information during image enhancement", Proc. SPIE 1702, Hybrid Image and Signal Processing III, (1 July 1992); https://doi.org/10.1117/12.60571

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