Browse Prior Art Database

Data Extraction from Video Displays

IP.com Disclosure Number: IPCOM000094484D
Original Publication Date: 1965-Feb-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Sanders, JJ: AUTHOR

Abstract

Video densitometer 80 functions to measure the change of brightness versus time of an incremental area of a video display. For internal changes in brightness, Roentgen rays from X-ray source 10 pass through subject 20 and are intensified by 30 to become visible to video camera 35. Sync generator 40 provides the proper signals for operating 35 Source 10 and intensifier 30 would not be necessary if the change in brightness of 20 were directly visible to 35. The incremental area of the video display to be examined is selectively located by timing control 50 which essentially provides signals for operating switches of densitometer 80. Video monitor 70 also receives signals from timing control 50 which enable visual monitoring of the selective incremental area of the video display produced from 35.

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Data Extraction from Video Displays

Video densitometer 80 functions to measure the change of brightness versus time of an incremental area of a video display. For internal changes in brightness, Roentgen rays from X-ray source 10 pass through subject 20 and are intensified by 30 to become visible to video camera 35. Sync generator 40 provides the proper signals for operating 35 Source 10 and intensifier 30 would not be necessary if the change in brightness of 20 were directly visible to 35. The incremental area of the video display to be examined is selectively located by timing control 50 which essentially provides signals for operating switches of densitometer 80. Video monitor 70 also receives signals from timing control 50 which enable visual monitoring of the selective incremental area of the video display produced from 35.

Timing control 50 includes vertical position start logic 51 for developing a signal from the composite blanking signal from 40. The signal developed by 51 is essentially a synchronization signal which is fed to delay 52. Delay 52 functions to locate the upper boundary of the incremental area. Its output is passed to delay 53 which determines the height of the incremental area by defining the lower boundary. And 54 receives a horizontal drive input from 40 and an input from 53. An output signal from 54 essentially permits the left-hand boundary of the incremental area to be defined by delay 55. Delay 56 functions to define the width of the...