Optimized lighting method for slider serial reading using...

Details Optimized lighting method for slider serial reading using... Optimized lighting method for slider serial reading using...

2005-12-15

2009-08-11

Bella, Matthew C (Department: 2624)

Image analysis

Pattern recognition

Reexamination Certificate

active

07574046

ABSTRACT:
Embodiments of the invention provide a method for setting a light source parameter in order to recognize an identification mark on an object surface. In one embodiment, a grayscale image is generated by setting the light volume of the light source to a given value. Plural thresholds each for binarizing the grayscale image in density are set. The inter-class variance values to be produced respectively according to the thresholds are calculated and the largest inter-class variance value is selected as the peak inter-class variance value from the inter-class variance values calculated. The light volume is changed to a plurality of different values. Peak inter-class variance values are obtained respectively for the values and the largest peak inter-class variance value is selected as the maximum inter-class variance value from the peak inter-class variance values obtained. The object surface is irradiated by the light source whose light volume is set to a value which would give the maximum inter-class variance value.

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patent: 5956421 (1999-09-01), Tanaka et al.
patent: 6721443 (2004-04-01), Nakata
patent: 09-269972 (1997-10-01), None
patent: 2000-269165 (2000-09-01), None
patent: 2003-037151 (2003-02-01), None
patent: 2003-177013 (2003-06-01), None

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