Automatic optical inspection system having a weighted transition

Television – Special applications – Flaw detector

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Details

348127, 348125, 348129, H04N 118, H04N 947

Patent

active

055172342

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 wherein 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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