Image analysis – Applications – 3-d or stereo imaging analysis
Patent
1998-09-24
2000-09-05
Boudreau, Leo H.
Image analysis
Applications
3-d or stereo imaging analysis
382150, 382151, 382168, 382294, 702 40, 702 94, 702153, G06K 952, G06T 120, G06T 300, G06T 540
Patent
active
061154911
ABSTRACT:
A computer implemented software device for estimating background tilt and offset is disclosed to preferably be adaptable to an optical measurement instrument wherein the estimated parameters are resolved to generate a reference plane to be subtracted from a height map of a phase profile. A set of histograms of heights is used to develop a merit function. A two-dimensional high speed iterative search is used to optimize the merit function to generate a reference plane coincident with the spatial tilt of the phase profile. The invention enables real-time measurement of substrate height for preferred use in high-speed image processing operations relating to circuit-board production lines.
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Fishbaine David
Rudd Eric P.
Boudreau Leo H.
CyberOptics Corporation
Werner Brian P.
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