In this paper we discuss image processing algorithms for analysis of structures in the films of biological liquids obtained by the cuneiform dehydration method. In medical diagnostics the cuneiform dehydration may be considered as a promising method of biological liquids studies. Main types of structures in the biological liquid films are presented. Today the methods of interpretation and algorithms of processing of biological films images does not exists. We consider creation of these algorithms and possibility to develop software for medical diagnostics.