[image processing] Thresholding is the simplest method of image segmentation. From a grayscale image, thresholding can be used to create binary images (Shapiro, et al. 2001:83). ==Categorizing thresholding Methods== Sezgin and Sankur (2004) categorize thresholding methods into the following six groups based on the information the algorithm ...
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http://en.wikipedia.org/wiki/Thresholding_(image_processing)

Image processing technique which defines whether a scanned pixel should be considered black or white. Commonly used to drop out background colours in order to clarify the textual content or line work of a document.
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http://www.encyclo.co.uk/local/20462
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