Inspection of printed circuit boards by connectivity preserving shrinking

Two algorithms for visual inspection of printed-circuit boards are presented that perform width checking of conductors and insulators. The first detects the difference between the results of shrinking and connectivity-preserving shrinking (CPS). The second algorithm produces a difference between the...

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Bibliographic Details
Published inIEEE transactions on pattern analysis and machine intelligence Vol. 10; no. 5; pp. 737 - 742
Main Authors Ye, Q.-Z., Danielsson, P.E.
Format Journal Article
LanguageEnglish
Published Los Alamitos, CA IEEE 01.09.1988
IEEE Computer Society
Subjects
Applied sciences
Character recognition
Computer architecture
Computer vision
Drugs
Dynamic programming
Electronic equipment and fabrication. Passive components, printed wiring boards, connectics
Electronics
Exact sciences and technology
Inspection
Pattern matching
Pattern recognition
Printed circuits
Toxicology
Image processing
Visual observation
Inspection
Error detection
Printed circuit
Pattern recognition
Algorithm
Artificial intelligence
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Summary:Two algorithms for visual inspection of printed-circuit boards are presented that perform width checking of conductors and insulators. The first detects the difference between the results of shrinking and connectivity-preserving shrinking (CPS). The second algorithm produces a difference between the original and the shrunk picture. This result is subject to a number of CPS-operations after which errors are easily detected. Both algorithms can be adapted to a suitable level of sensitivity to sharp corners and edge irregularities. A sequential version of CPS is also described which is well suited for hardware implementation in a pipelined structure.< >
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0162-8828
1939-3539
2160-9292
DOI:10.1109/34.6785