A Certified Module to Study Digital Images with the Kenzo System

Kenzo is a Computer Algebra system devoted to Algebraic Topology, written in the Common Lisp programming language. In this paper, programs which allow us to analyze monochromatic digital images with the Kenzo system are presented. Besides a complete automated proof of the correctness of our programs is provided. The proof is carried out using ACL2, a system for proving properties of programs written in (a subset of) Common Lisp.