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Browse Prior Art Database

Optical Character Recognition System

IP.com Disclosure Number: IPCOM000050973D
Original Publication Date: 1982-Dec-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Begun, RM: AUTHOR [+3]

Abstract

The system is comprised of the four major blocks shown in Fig. 1. The TV camara 10 is any standard vidicon or solid-state array generating a composite video output. This composite video is sent to both the monitor 12 and the video interface box 14. The monitor serves only to display the camera viewing area so that the lens and lighting can be properly adjusted.

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Optical Character Recognition System

The system is comprised of the four major blocks shown in Fig. 1. The TV camara 10 is any standard vidicon or solid-state array generating a composite video output. This composite video is sent to both the monitor 12 and the video interface box 14. The monitor serves only to display the camera viewing area so that the lens and lighting can be properly adjusted.

The video interface 14 is outlined in Fig. 2. Its function is to detect the stored X and Y information on the targets. A target can be defined as either a white to black or black to white transition on the video line, after binary conversion has occurred.

The binary converter 16 changes the analog input to a TTL (transistor transistor logic) compatible black or white only level.

The black/white transitions are used to gate the counters and latches to provide a total of 30 bits of data. Three 10-bit fields are used: line number (Y coordinate), distance from left hand edge (X coordinate), and width. This data is stored in a fast random-access memory (RAM) 18 on a real time basis during one half frame of the television scan (1/60th second). Once the half frame cycle is complete, the Series/1 Computer 20 is free to access the RAM contents.

The Series/1 program (Fig. 3) obtains the X,Y and width coordinates of the character image via two integrated DI/D0 cards. After filtering out unwanted data, each individual character is found, isolated, framed, and left adjusted within t...