Region-based segmentation of Hexagonal digital images using membrane computing

P system is a distributed and parallel computing model in membrane computing, processing multisets of symbol objects in a localized manner. This computational model has proved to be a robust framework for modelling a variety of situations arising in very different areas, for instance, investigation of problems related to digital images. In this paper, we develop a P system for handling region-based segmentation of two-dimensional hexagonal digital images motivated by a corresponding model for rectangular digital images and point out the utility of these P systems for segmenting groups of crowds.