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Abstract : |
We develop efficient algorithms for low and intermediate level image processing on the scan line array processor, a SIMD machine consisting of a linear array of cells that processes images in a scan line fashion. For low level processing, we present algorithms for block DFT, block DCT, convolution, template matching, shrinking, and expanding which run in real-time. By real-time, we mean that, if the required processing is based on neighborhoods of size m \Theta m, then the output lines are generated at a rate of O(m) operations per line and a latency of O(m) scan lines, which is the best that can be achieved on this model. We also develop an algorithm for median filtering which runs in almost real-time at a cost of O(m log m) time per scan line and a latency of b, |
