Image analysis – Histogram processing – For setting a threshold
Patent
1979-08-29
1987-04-28
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
356237, 382 65, G06K 900
Patent
active
046619844
ABSTRACT:
A line inspection system suitable for inspecting printed circuit boards for defects. In a first embodiment disclosed, a plurality of sensors which detect the presence or absence of conductor material on the board are grouped in a preestablished pattern. The area of the circuit board to be inspected is scanned by the sensing pattern and logical sequences of sensor condition which indicate defects are searched for. In a second embodiment disclosed, the area to be inspected is scanned serially, and the resultant data stored. Logical analysis is then performed on the stored data to determine whether the pattern of data is or is not consistent with an acceptable part.
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