Thresholding 2D Images with Cell-like P Systems

Thresholding is the process of splitting a digital image into sets of pixels in order to make it easier to analyze. Pixels are ordered according to a scale of one of their features as brightness or color and the ¯nal image is obtained by comparing the measure of the feature with some thresholds. In this paper we present a family of cell-like P systems which solve the thresholding problem in linear time on the number of pixels.