Page width optical character processing method and system

Details Page width optical character processing method and system Page width optical character processing method and system

1972-06-19

1976-06-08

Henon, Paul J.

Communications: electrical

Digital comparator systems

3401463AG, 3401463MA, 178 76, 179 15AE, G06k 912

Patent

active

039626814

ABSTRACT:
A transport system moves documents beneath a self-scanned photocell array extending substantially the entire width of a page. The output data from the photocells is scanned via a plurality of channels, amplified, multiplexed, and converted to a digital format. The digital data is then processed to compensate for fixed pattern errors characteristic of the photocell array and for scan pattern error. The corrected digital data is quantized for character thresholding and input to a recirculating memory. Line-tracking circuitry monitors the location of individual lines of character data within the recirculating memory and gates a complete line of character data into one of two storage registers. While data is input to one register, the contents of the other register is output to character recognition circuitry.

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patent: 3717848 (1973-02-01), Irvin et al.
Salsbury et al., "A Monolithic Image Sensor . . . ," Proceedings of the IEEE, vol. 58, No. 9, Sept. 1970, pp. 1302-1305.
Swart, "Contrast Amplifier," IBM Tech. Disclosure Bulletin, vol. 14, No. 3, Aug. 1971, pp. 883-884.
Crawford, "Pictorial Information Disector and Analyzer System," IBM Tech. Disclosure Bulletin, vol. 15, No. 1, June 1972, pp. 61 & 62.

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