Hexadecagonal region growing

AbstractIn spite of their non-isotropic nature, local growths based on 4-connected or 8-connected neighborhoods are frequently used for binary image dilation, mostly because they are very easy to implement. Altough better dilation techniques exist, they usually require bigger masks, more complex routines, exotical grid definitions or globally processing the image. In this article we propose a new 3x3 implementation of the hexadecagonal model for a better aproximation of isotropic growth on a square grid that doesn’t have the problems of its traditional incarnations.