METHOD FOR OBJECT IDENTIFICATION AND DEVICE WHICH IMPLEMENTS SAID METHOD Russian patent published in 1998 - IPC

FIELD: image recognition using optical and automatic-processing tools. SUBSTANCE: method involves generation of image of chosen piece of object surface on photodetector surface in diffuse reflected illumination which provides most valid information about surface texture and structure of chosen piece of surface. Then method involves sampling signals from outputs of photodetector, generation of array of digital characteristics for given image and its comparison to stored set which corresponds to reference image of same piece of surface. Corresponding device has housing which is located in operator hand and has input window with tools of three-dimensional fixation of input window with respect to surface piece under investigation. In addition device has sequence which is located in symmetry about window and is composed of converging lens, source of illumination, opaque screen, photodetector. Source of illumination is located in focal plane of lens. Screen is located directly behind source of illumination. Light which is reflected from surface is captured by opaque screen, so that photodetector is exposed to diffuse reflected illumination. Electronic unit has analog- to-digital converter, microprocessor, control unit, which are located in same housing. EFFECT: increased reliability, simplified design. 4 cl, 1 dwg