Within the joint project of MLIT and LRB JINR, aimed to the creation of an information system for the tasks of radiation biology, a module to study the behavioral patterns of small laboratory animals exposed to radiation is being developed. The module for behavioral analysis automates the analysis of video data obtained by testing laboratory animals in different test systems. The ”Open Field” behavioral test is one of the systems. The considered behavioral test has a form of round arena with chequered-marked sectors and holes. The observation procedure on laboratory animals takes 3-6 minutes. The ”Open Field” test system allows one to register the exploratory and general motor activities, orienting-exploratory reaction and emotional status of the animal. To this aim, we fix the number of crossed sectors together with the number of intersections of the marked center. In addition, the actions the animal performed, i.e., hole dipping, rearing/climbing, freezing and shifting, is taken into account.
Therefore, one of our tasks is to develop an algorithm for behavioral test arena marking. The paper presents algorithms for arena marking of the ”Open Field” test system on the basis of computer vision methods together with the method of key points within a neural network approach.