Pattern recognition device

Details Pattern recognition device Pattern recognition device

1988-09-07

1991-12-17

Razavi, Michael

Image analysis

Histogram processing

For setting a threshold

382 33, 358106, G06K 960

Patent

active

050739522

ABSTRACT:
Data which represents a border line of a region of a video image to be observed and which contains a large luminance difference compared with that of a defect to be detected is excluded in judgement when it belongs to a predetermined region so that it is possible to detect a minute defect or defects reliably even when a position of a workpiece is displaced from that of a master or when the border line of the workpiece is not coincident with that of the master due to a difference in size therebetween.

REFERENCES:
patent: 3781801 (1973-12-01), Anderegg
patent: 4345312 (1982-08-01), Yasuye et al.
patent: 4776023 (1988-11-01), Hamada et al.
patent: 4803734 (1989-02-01), Onishi et al.

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