1. A fast level set method for propagating interfaces;Adalsteinsson;Journal of Computational Physics,1995
2. Anonymous, 2007. Pirate attacks increase worldwide. URL .
3. Anonymous, 2008a. Attacks on ships general guidance. URL .
4. Anonymous, 2008b. International maritime bureau reporting center. URL .
5. Active contours without edges;Chan;IEEE Transactions on Image Processing,2001