Edge tracing with hysteresis thresholding
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United States of America Patent
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Feb 24, 2015
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Mar 22, 2012
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Nov 18, 2011
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Abstract
A method for tracing edges of an image using hysteresis thresholding includes: (i) receiving an edge map of the image, (ii) scanning one row of the input edge map, (iii) assigning a label to each edge pixel in the row based at least in part on the presence or absence of a neighboring edge pixel, (iv) grouping contiguous labels, and (v) identifying groups of edge pixels.
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