Optics: measuring and testing – By configuration comparison – With comparison to master – desired shape – or reference voltage
Patent
1992-08-06
1994-05-31
Evans, F. L.
Optics: measuring and testing
By configuration comparison
With comparison to master, desired shape, or reference voltage
G01B 1100
Patent
active
053173902
ABSTRACT:
Individual printed image elements from an image to be inspected are allotted individual nominal ink density values, as by scanning an ideal printed sheet by a CCD matrix camera. The ideal values are stored in a main memory having segments for maximum and minimum values for each image element. A multiplicity of proof images are scanned, and their density values measured and stored for each proof judged acceptable by an inspector. Thereafter, the variations in the acceptable proof density values are stored in the main memory as maximum and minimum acceptable deviations from the initial nominal values for each individual image element to provide a subjective tolerance value for the nominal density values in the main memory.
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patent: 4677680 (1987-06-01), Harima et al.
A. Rosenfeld, "Multiresolution Image Processing and Analysis", Springer Series in Information Sciences, 1984, pp. 1-5, 364-379, Berlin.
Sobey et al., "Detection and Sizing Visual Features in Wood", Pattern Recognition, Bd. 22, Nr. 4, 1989, Elmsford, NY US, pp. 367-380.
Tanimizu, "High Speed Defect Detection Method for Coloer Printed Matter", 16th Annual Conference of IEEE Industrial Electronics Society, Bd. 1, 27 Nov. 1990, Asilomar Conference Center CA. (US), pp. 653-658.
Bolza-Schunemann Claus A.
Bolza-Schunemann Hans-Bernhard
Germann Albrecht J.
Evans F. L.
Koenig & Bauer Aktiengesellschaft
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