Tissue-like P Systems with Active Membranes for Picture Generation

We propose a variant of tissue-like P systems with symport rules and active membranes that generates two-dimensional picture languages. The method is unconventional in that, instead of using the membranes as regions for computation/writing, it uses them to hold elements of pictures. Thus, the picture itself, and actually the whole supporting rectangular grid, is composed of membranes, each one containing (among other symbols) a letter of the picture's alphabet. The method is illustrated by its application to the generation of local and recognizable picture languages.