Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Cursors for Use in Digital Displays

IP.com Disclosure Number: IPCOM000086843D
Original Publication Date: 1976-Nov-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Brock, GW: AUTHOR [+3]

Abstract

A digital display on a CRT face can be used with cursors for making precision measurements. First, of course, the CRT system must be calibrated to a measuring device. This can be achieved by displaying a reference object T1 on the face of the CRT tube. Then, a pair of cursors C1 and C2 bracket T1 with the spacing between C1 and C2 indicating the dimension of T1. This measurement can be calibrated in an automatic computer (not shown) for making subsequent measurements. Subsequently, a microscopic or other form of measurement can be made on the face of the CRT tube by relatively moving cursors C1 and C2. For example, C2 can be moved to position C2' for measuring the horizontal distance between T1 and T2. T2 can be accurately measured by further moving cursors C1 to bracket T2 in the same manner it bracketed T1.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

Page 1 of 2

Cursors for Use in Digital Displays

A digital display on a CRT face can be used with cursors for making precision measurements. First, of course, the CRT system must be calibrated to a measuring device. This can be achieved by displaying a reference object T1 on the face of the CRT tube. Then, a pair of cursors C1 and C2 bracket T1 with the spacing between C1 and C2 indicating the dimension of T1. This measurement can be calibrated in an automatic computer (not shown) for making subsequent measurements. Subsequently, a microscopic or other form of measurement can be made on the face of the CRT tube by relatively moving cursors C1 and C2. For example, C2 can be moved to position C2' for measuring the horizontal distance between T1 and T2. T2 can be accurately measured by further moving cursors C1 to bracket T2 in the same manner it bracketed T1. Horizontal cursor C1H and C2H can also be employed. Alternatively, a short T-shaped cursor C3 can be made movable on one of the two vertical cursors. A second but horizontal cursor C4, also movable, can be located on a vertical cursor and moved for positioning, as described for C1 and C2.

The above-described system is particularly useful when the displayed video is subject to degradation. For example, half-tones may be degraded. By using the two cursors with respect to T1, as above described, the degradation can be effectively cancelled out because of the differential viewing. Similar techniques can be employed for multicolored displays. Accordingly, graphical analysis is enh...