Image analysis – Histogram processing – For setting a threshold
Patent
1991-02-14
1992-07-28
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 34, 358101, 358107, G06K 900
Patent
active
051346656
ABSTRACT:
A displacement sensor is attached to the XY direction movable body adapted to move over the land pattern of a printed circuit board in an X direction and Y direction, and rotatable in a direction parallel to the printed circuit board. The rotary mechanism allows the displacement sensor to be rotated in a direction which is orthogonal to the movement direction of XY direction movable body. The signals from said displacement sensor will be processed so that the film thickness and the print pattern of the solder on the land pattern may be detected. An ITV area sensor is also provided at said XY direction movable body so that the signals from the ITV area sensor may be processed to detect any print deviation of the soldering deviation on said land pattern.
REFERENCES:
patent: 4233625 (1980-11-01), Altman
patent: 4441205 (1984-04-01), Berkin et al.
patent: 4668982 (1987-05-01), Tinnerino
patent: 4731853 (1988-03-01), Hata et al.
patent: 4852131 (1989-07-01), Armistead
patent: 4922434 (1990-05-01), Fule
Ikegamitsushin K.K. Model No. MS 400R (No Date).
TDK Model No. CE-1500 (No Date).
Fuji Model No. GSPII-400 (No Date).
Nyurongu Seimitsu K.K. Model No. LS 34 TVA (No Date).
Kyushu Matsushita Electric Co., Ltd. Model No. SP10P-L (No Date).
Matsushita Electric Industrial Co., Ltd. Model No. NM-2624 (No Date).
Boudreau Leo H.
Mitsubishi Denki & Kabushiki Kaisha
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