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. 2015 Jan 6;15(1):880–898. doi: 10.3390/s150100880

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© 2015 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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Figure 5. — (a) A (2p+1) × (2p+1) region centered at (x_c, y_c), denoted as R_e, containing only a single edge; (b) the ideal edge function along the horizontal line in R_e; and (c) the convolution of the ideal edge function with a Gaussian blurring kernel.