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. 2010 Sep 4;26(18):i659–i665. doi: 10.1093/bioinformatics/btq397

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© The Author(s) 2010. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1. — An illustration of zero-crossing lines and ridge lines comparison. (a) A peak sample with shape followed () and Gaussian noise (SD = 1); (b) Using Gaus1, the zero-crossing line corresponds to peak position, t = 5; (c) Using Gaus2, two zero-crossing lines correspond to two peak edges whose distances to peak position are σ_i = 0.5; (d) Using Gaus1, two ridge lines are corresponding to two peak edges whose distances to peak position are σ_i = 0.5; (e) Using Gaus3, three zero-crossing lines are corresponding to one peak position and two peak edges whose distances to peak position are ; (f) Using Gaus2, three ridge lines are corresponding to one peak position and two peak edges whose distances to peak position are .

Inline graphic — An illustration of zero-crossing lines and ridge lines comparison. (a) A peak sample with shape followed () and Gaussian noise (SD = 1); (b) Using Gaus1, the zero-crossing line corresponds to peak position, t = 5; (c) Using Gaus2, two zero-crossing lines correspond to two peak edges whose distances to peak position are σ_i = 0.5; (d) Using Gaus1, two ridge lines are corresponding to two peak edges whose distances to peak position are σ_i = 0.5; (e) Using Gaus3, three zero-crossing lines are corresponding to one peak position and two peak edges whose distances to peak position are ; (f) Using Gaus2, three ridge lines are corresponding to one peak position and two peak edges whose distances to peak position are .