Omnidirectional bar code reader with method and apparatus for de

Details Omnidirectional bar code reader with method and apparatus for de Omnidirectional bar code reader with method and apparatus for de

1990-03-28

1992-10-13

Levy, Stuart S.

Registers

Coded record sensors

Particular sensor structure

235463, 235470, 235454, 382 11, 382 12, G06K 710, G06K 918

Patent

active

051553430

ABSTRACT:
A bar code reader includes an optical system for storing a two dimensional image in memory, which stored two dimensional image contains a bar code symbol. A method and apparatus is disclosed for detecting the location of said bar code image by computing the accumulated sum of the products of the derivatives of respective first and second scan lines as a location score for the image under consideration. The higher the location score, the higher the probability that the area under consideration contains a bar code image. Also, a method and apparatus is disclosed for determining the fine orientation of a located bar code image by the cross-correlation of interpolated scan line data. The bar code image is filtered by shifting interpolated scan line data in accordance with the detected peak of the cross-correlation and combining the shifted scan line data.

REFERENCES:
patent: 3801775 (1974-04-01), Acker
patent: 4000397 (1976-12-01), Hebert et al.
patent: 4007377 (1977-02-01), Simon et al.
patent: 4232216 (1980-11-01), Helle
patent: 4282425 (1981-08-01), Chadima et al.
patent: 4354101 (1982-10-01), Hester et al.
patent: 4394683 (1983-07-01), Liptay-Wagner et al.
patent: 4488679 (1984-12-01), Bockholt et al.
patent: 4500776 (1985-02-01), Laser
patent: 4570057 (1986-02-01), Chadima et al.
patent: 4652731 (1987-03-01), Chautemps et al.
patent: 4727419 (1988-02-01), Yamada et al.
patent: 4749879 (1988-06-01), Peterson et al.
patent: 4766300 (1988-08-01), Chadima et al.
patent: 4874936 (1989-10-01), Chandler et al.
patent: 4896029 (1990-01-01), Chandler et al.
patent: 4958064 (1990-09-01), Kirkpatrick

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