Once again, this model is not proposed as a final answer to all of the problems of brightness perception, but as a unique and original approach to the problem that is deserving of consideration.

The fact that this model is not intended as the complete and final solutuion to brightness perception is evidenced by the fact that an alternative and completely different (and more robust) solution is proposed in Part II of this paper. The model presented here is presented in order to develop some general principles of perceptual modeling and emergence in a simpler (two-dimensional) problem domain.