Browse Prior Art Database

Character Misregistration Detection Circuit

IP.com Disclosure Number: IPCOM000098589D
Original Publication Date: 1959-Apr-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Rohland, WS: AUTHOR [+2]

Abstract

The arrangement detects misregistration of characters being scanned in a character recognition system in which a dead time interval exists at the beginning and ending of each scan. Sampling pulses are generated by A and B sample generators 1 and 3 at predetermined intervals before and after the dead time pulse occurs. Video and dead time signals are switched with the A and B pulses to govern low and high registration latches 5 and 7. Also, the video and dead time pulses are integrated, switched with the A and B pulses, and compared with given levels by voltage discriminators 9 and 11, which govern a counter 13.

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Character Misregistration Detection Circuit

The arrangement detects misregistration of characters being scanned in a character recognition system in which a dead time interval exists at the beginning and ending of each scan. Sampling pulses are generated by A and B sample generators 1 and 3 at predetermined intervals before and after the dead time pulse occurs. Video and dead time signals are switched with the A and B pulses to govern low and high registration latches 5 and 7. Also, the video and dead time pulses are integrated, switched with the A and B pulses, and compared with given levels by voltage discriminators 9 and 11, which govern a counter 13.

If a predetermined number of misregistrations occurs during the scanning of a given character, the counter output samples the registration latches to provide a low or high registration signal, which is used to select the low and high registration documents, or to provide registration correction control.

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