In this work a massively parallel VLSI architecture is discussed: PAPRICA, a mesh connected machine that can also simulate a pyramidal architecture. Its computational paradigm is based on the matching operator as defined in mathematical morphology. This description is equivalent to the Cellular Automata paradigm, which can simplify the design of PAPRICA applications in low-level vision. PAPRICA is currently simulated on a Unix workstation connected to a Connection Machine CM-2, while the hardware is under testing.