Method and apparatus for reading a bar code

Details Method and apparatus for reading a bar code Method and apparatus for reading a bar code

1982-06-03

1984-12-18

Schreyer, Stafford D.

Registers

Coded record sensors

Particular sensor structure

235462, G06K 714

Patent

active

044886780

ABSTRACT:
A bar code having parallel bars carrying information is divided into a plurality of regions so that each region is detected by a field of vision of an image sensor of a bar code reader. The bars in each region are detected by a scanning operation to store data indicative of the width of each bar into a memory. When scanning of a region is completed, detection of another region follows to store data in the same manner. After all the regions are scanned to obtain their data, these data are combined to produce a combined data. Some superfluous data due to overlapping of two consecutive regions are removed from the combined data. In one embodiment, the superfluous data are removed by using data indicative separation bars provided between the two consecutive regions, while in another embodiment, the superfluous data are removed by using a predetermined value indicative of the actual number of bars of the bar code.

REFERENCES:
patent: 3979577 (1976-09-01), Seligman
patent: 4184179 (1980-01-01), Deming
patent: 4210802 (1980-07-01), Sakai
patent: 4282426 (1981-08-01), Neseem et al.
patent: 4308455 (1981-12-01), Bullis et al.
patent: 4346292 (1982-08-01), Routt, Jr. et al.
patent: 4354101 (1982-10-01), Hester et al.
patent: 4414468 (1983-11-01), Laurer et al.

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