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Optimal reduction of the number of grey levels present in an image is a fundamental problem in segmentation, classification, lossy compression, quantisation, inspection and computer vision. We present a new algorithm based on dynamic programming and optimal partitioning of the image data space, or its histogram representation. The algorithm allows the reduction of the number of grey levels for an...
In this paper, a new edge detector (boundary extractor) is proposed based on finding major change points in a local one-dimensional window of the image intensity values of the rows or columns. The approach amounts to separating the pixels in the window into sets or regions of constant intensities with the edge pixels providing transition points. The edge points are found based on partitioning the...
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