Method and apparatus for providing a three state data base for u

Details Method and apparatus for providing a three state data base for u Method and apparatus for providing a three state data base for u

1990-04-10

1992-10-20

Harkcom, Gary V.

Image analysis

Histogram processing

For setting a threshold

395118, 382 16, 382 18, G06F 1540

Patent

active

051577623

ABSTRACT:
A method and apparatus used with a printed circuit board (PCB) defect detecting system generates a reference database image of the PCB having tolerances for each individual PCB feature. A transitional data base is included that has three states, black, white and gray corresponding to areas where the PCB features respectively must appear, must not appear and may or may not appear.

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patent: 4500202 (1985-02-01), Smyth
patent: 4578810 (1986-03-01), MacFarlane et al.
patent: 4668982 (1987-05-01), Tinnerino
patent: 4720803 (1988-01-01), Ishii
patent: 4776022 (1988-10-01), Fox et al.
patent: 4776023 (1988-10-01), Hamada et al.
patent: 4830497 (1989-05-01), Iwata et al.
Model 076 Decompression Processor Specification Laser Plotter Brochure--GSI May 1985.
Model 588 AT&T Tape Format Specification Laser Plotter Brochure GSI May 1985.

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