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The LED Reader: Continued...   Step 2a of 7: From the greyscale image, find the Edge Intensities:   Greyscale image:   Vertical (V) edge intensities:   Horizontal (H) edge intensities:   Edge Intensities happen when there's a dark part of the image, then a light part, then a dark part, all in a row. The edge will be the light part.     Copyright (c) 2004, Blindsight Corp. All rights reserved.