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Computing minima and maxima of digital images in pipeline image processing systems without hardware comparators

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2 Author(s)
Sanz, J.L.C. ; IBM Research Laboratory, San Jose, CA, USA ; Flickner, Myron D.

Several commercially available image processing systems do not have comparators in their arithmetic processors. This fact makes the computation of local minima/maxima of digital images or pixel-by-pixel minima/maxima between two or more images seem impossible. This letter describes an efficient technique for computing maxima and minima without the use of a hardware comparator. The procedure requires only table look-up and simple arithmetic operations, and therefore can be efficiently implemented in commercially available pipeline image processors.

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Proceedings of the IEEE  (Volume:73 ,  Issue: 8 )