Image analysis – Histogram processing – For setting a threshold
Patent
1984-03-09
1986-06-17
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
356384, 356387, 358101, 358107, 382 62, G06K 900
Patent
active
045960372
ABSTRACT:
Apparatus for determining the location of a physical feature, such as a hole in a panel, relative to two coordinate axes by optically scanning across the panel and hole from a reference while measuring the distance of the hole from the reference and the length of the hole chord for each of a plurality of scans, then adding half the chord length to the respective distance to the hole edge and averaging the results for the plurality of scans. Scan lines used for the hole edge and chord measurement can be selected from among a plurality of scan lines having a predetermined chord length. The measuring apparatus can also be readily adjusted to accommodate a range of feature dimensions.
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Bouchard Donald R.
Danton John L.
Dawson Kevin A.
Sloma David J.
Adour David L.
Boudreau Leo H.
International Business Machines - Corporation
Johnson Kenneth P.
Mancuso Joseph
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