Apparatus and method for comparing and aligning two digital repr

Details Apparatus and method for comparing and aligning two digital repr Apparatus and method for comparing and aligning two digital repr

1993-07-26

1997-04-08

Boudreau, Leo

Image analysis

Applications

Manufacturing or product inspection

382209, G06K 900

Patent

active

056195885

ABSTRACT:
A method for comparing first and second digital representations of an image, the method comprising the steps of: for each individual translation from among a plurality of translations from the first digital representation to the second digital representation: for each individual image location from among a plurality of image locations within a comparison entity within the first digital representation, determining a binary legitimacy value of the individual translation for the individual image location by comparing the individual image location to a location in the second digital representation defined by operating the individual translation on the individual image location; and combining the binary legitimacy values of image locations within the comparison entity, thereby to generate a comparison entity legitimacy value determining whether the individual translation is legitimate for the comparison entity; and announcing a defect for the comparison entity if none of the plurality of translations are legitimate therefor.

REFERENCES:
patent: 4345312 (1982-08-01), Yasuye et al.
patent: 4503557 (1985-03-01), Maeda
patent: 4532650 (1985-07-01), Wihl et al.
patent: 4579455 (1986-04-01), Levy et al.
patent: 4805123 (1989-02-01), Specht et al.
patent: 4864629 (1989-09-01), Deering
patent: 5163101 (1992-11-01), Deering
patent: 5253306 (1993-10-01), Nishio

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