Browse Prior Art Database

Minimizing Operator Digitization Mistakes Employing a Unitary Display Digitizing Surface

IP.com Disclosure Number: IPCOM000084697D
Original Publication Date: 1975-Dec-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Giddings, GM: AUTHOR [+2]

Abstract

There are many schemes for digitizing drawings, maps, etc. for computer storage and processing. The digitization process is prone to error (points and lines are easily missed) and it is difficult to make corrections or to verify correctness of the finished drawing, if the digitization surface and the display surface are different surfaces.

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Minimizing Operator Digitization Mistakes Employing a Unitary Display Digitizing Surface

There are many schemes for digitizing drawings, maps, etc. for computer storage and processing. The digitization process is prone to error (points and lines are easily missed) and it is difficult to make corrections or to verify correctness of the finished drawing, if the digitization surface and the display surface are different surfaces.

Direct visual comparison of superimposed start and end products is helpful, but superimposition in realtime while digitizing will immediately show any digitization errors at a stage when they are more easily corrected. To achieve this effect, people have projected one surface onto the other or have placed transparent foils containing the data to be digitized on top of the display surface that shows the digitized result. Both of these methods are clumsy, and this description outlines an apparatus to overcome these problems.

The method uses the superimposition of two images on one display surface. One image is the scanned image of an object placed in front of a scanner and the other image is the digitized image, displayed in a contrasting color. The digitized drawing is created by digitizing positions on the screen. Since the original image and the digitized version of it are on the same surface, any deviations or operator mistakes are clearly visible.

The apparatus for implementing the method comprises a TV camera for scanning the object, a...