METHOD FOR RECOGNITION OF SYMMETRY OF OBJECT IMAGES AND DEVICE FOR IMPLEMENTATION OF SAID METHOD Russian patent published in 1995 - IPC

FIELD: automation and computer engineering. SUBSTANCE: device has units for image displacement, image rotation unit, multiplicators of light beam, generators of signals of static moments, control unit. Sets of binary shadow masks which are in symmetry about axis are changed during each rotation of source image. Then source image is displaced to achieve balance of integral signals that arrive from corresponding half-surfaces of source image. Symmetry type (central, axial symmetry or without symmetry) is judged by presence or absence of these shifts for different rotation angles. EFFECT: increased functional capabilities. 2 cl, 15 dwg, 4 tbl