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sobel edge detection and hough transform

Question asked by shinep on Oct 24, 2010
Latest reply on Feb 10, 2011 by akshay

AS the image processing tool box 1.3.0 liberary reference manual say,  Hough transform function's input image buffer  must be edge-map and it is 8bit data, but the sobel edge detection output buffer is 16bit data,So I have the question: is it the sobel output  edge_maped? and how can I transform the sobel edge detection output to the format as hough transform requiered?