MEASURES FOR RECOGNITION BY COMRUTER OF ROAD AND PRINTED CHARACTERS OF DIFFERENT FONTS WITH DEFINITE DEFECTS OF PICTURES OF CHARACTERS
Background. The reading devices existing now are focused on recognition only of the defined or stylized printed characters. The purpose of the real work consists in development of the reading device capable with high degree of reliability and with high speed to distinguish the road and printed characters of different fonts having certain defects of the press. Materials and methods. The photoelectronic system of perception of signs from a data carrier by means of which the image of signs were line by line transformed to the rectangular impulses coming in a certain order to a computer memory was developed for experiments. The program realizing an original method of recognition of signs was developed for the computer distinguishing signs. The essence of a method consists that the computer, since a certain trailer point, bypasses a sign in the certain directions correspon- ding to a sign contour. Code record of a sign in the form of numbers of certain directions as round on a contour is formed. Thus, possible defects of images of signs are liquidated, the sign will on a substantial scale be transformed. There is an identification like a sign. Results. In the course of carrying out experiments the optimum quantity of the cells of a memory of the computer which are memorable the image of a sign was defined, were estimated reliability of recognition of signs and measures to its increase were taken. The program for self-training of the computer for recognition of any unfamiliar, not used during testing printing font is developed. Conclusions. The reading device of road and printed characters with existence of different defects of the image is developed. It was established what restrictions imposes the developed reading device on recognizability of signs.