Browse Prior Art Database

Video Data Comparison

IP.com Disclosure Number: IPCOM000085983D
Original Publication Date: 1976-Jul-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Suding, R: AUTHOR

Abstract

Data stored in a computer memory is visually compared with a graphic version of the same data on one video display. Points on the display representing differences between the two versions appear as blinking images.

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Video Data Comparison

Data stored in a computer memory is visually compared with a graphic version of the same data on one video display. Points on the display representing differences between the two versions appear as blinking images.

The system typically uses a map or blueprint placed on a graphic tablet to enter data into a computer. Simultaneously, a TV camera is focused on the same area as being entered. The resultant video is processed by a grey scale- to-binary converter. The computer controls the TV camera's position and lens setting to achieve the desired data-to-graphic symbol correlation.

An electronic switch alternately connects the display to the camera and the computer at a rate which causes points of difference to blink, while points receiving identical information from the two sources remain stable. A switching frequency of about 0.5 Hz gives an optimum balance of stable and blinking points.

The resultant display permits the operator to easily see missing or misplaced symbols. The increased throughput and improved quality should offset the increased cost and complexity.

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