Registers – Coded record sensors – Particular sensor structure
Patent
1984-06-04
1986-08-26
Pitts, Harold I.
Registers
Coded record sensors
Particular sensor structure
235463, 235494, G06K 710
Patent
active
046084894
ABSTRACT:
A method and apparatus are disclosed for reading a two-dimensional bar code having bars located nominally at predetermined pitch increments. The invention provides a method and apparatus for reading a two-dimensional bar code and dynamically segmenting it into individual bars on a real time basis, as it is read. The segmentation is done on a bar-to-bar basis, and may be adjusted for an individual bar as necessary. The method and apparatus locate the bar data, scan it, and create a profile vector having elements based upon the amount of image data in each scan. The vector is compared to a predetermined stored set of vector elements representing the likelihood that each scan line of image data contains bar image data. Those scan lines of image data corresponding to a bar image are sent to recognition logic and those scan lines of image data corresponding to a space are disregarded.
REFERENCES:
patent: 3780270 (1973-12-01), Faulkner et al.
patent: 4045773 (1977-08-01), Kadota et al.
patent: 4175693 (1979-11-01), Nakanishi et al.
patent: 4389634 (1983-06-01), Nakamura
patent: 4408121 (1983-10-01), Galatha
IBM Technical Disclosure Bulletin, vol. 25, pp. 6074, 6076-6077, Apr. 1983.
Ramsey David A.
Rohe Clair F.
Sawicki Thomas E.
International Business Machines - Corporation
Pitts Harold I.
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