Television – Special applications – Manufacturing
Patent
1995-11-01
1997-03-04
Tran, Thai Q.
Television
Special applications
Manufacturing
348 91, 348 92, 348128, 348129, 348125, 348126, H04N 718, H04N 947
Patent
active
056084536
ABSTRACT:
A method and apparatus used with a printed circuit board (PCB) defect detection system generates a reference database image of the PCB having tolerances for each individual PCB feature, The invention is characterized by a tolerance database of at least three states in which each color is weighted and adjacent pixels are grouped into arrays or "bins". An error signal is generated when the sum of the pixel weights in a bin exceeds a preselected threshold.
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Davidson Bruce L.
Gerber H. Joseph
Kohler James P.
Seniff Dana W.
Snietka Scott P.
Gerber Systems Corporation
Rao Anand S.
Tran Thai Q.
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