Method and device for optoelectronic quality control

摘要

In a method for the optoelectronic quality control of moving specimens (1) by comparison with an original (4) by means of a camera (3) in real time, the pixels (12.P; 12.O) which are to be scanned by the camera (3) are controlled by a control computer (7). An analog comparison is carried out of the signals taken by the camera (3) and signals which coincide because of identical pixels (12.P; 12.O) are erased. Only the non-erased, remaining signals - error signals - are digitised and further processed in an evaluation computer (20). <IMAGE>