Relations between classification criteria of objects recognizable by ultrasonic systems

The paper presents connections between criteria which make three types of objects possible to recognize, namely: edges, planes and corners. These criteria can be applied while a binaural sonar system is used. It is shown that the criteria are specific forms of a general equation. The form of the equation depends on a single coefficient. In the paper the meaning of this coefficient is discussed. The constructions of the objects arrangements are presented which are bound with other values of the coefficient.