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On computing complete histograms of images in log (n) steps using hypercubes

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2 Author(s)
T. Bestul ; US Naval Res. Lab., Washington, DC, USA ; L. S. Davis

An algorithm for the computation of the histogram of limited-width (such as gray-level) values on a SIMD (single-instructions multiple-data) hypercube multiprocessor is proposed, which does not require the use of a general interconnection capability such as that on the connection machine. The computation of the complete histogram of n such values takes place in a series of log n steps, after which the histogram for value i can be found in the lowest-addressed processor whose address ends in i. The algorithm makes use of the association of suffixes of data values of increasing width with suffixes of processor addresses

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IEEE Transactions on Pattern Analysis and Machine Intelligence  (Volume:11 ,  Issue: 2 )