Coordinate input apparatus

Details Coordinate input apparatus Coordinate input apparatus

1988-05-23

1991-05-28

Coles, Sr., Edward L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitriles

358452, 358464, H04N 123, H04N 1024

Patent

active

050199170

ABSTRACT:
A coordinate input apparatus of the present invention in which operation is switchable from an image pickup mode for displaying on a display apparatus an image of an object for image-taking to a coordinate input mode for inputting coordinates at a location indicated by a point indicator and vice versa, so that when the coordinate input mode is set, the duration of scanning by an image pickup element is controlled shorter than that in the case of the image pickup mode being set, whereby the duration required for image pickup during coordinate input mode operation can be reduced and speedy processing can be achieved for coordinate inputting, and which is provided with an image processing circuit for optimum image processing with respect to image signals for images taken, so that images taken in short image pickup duration during coordinate input mode can be prevented from deterioration.

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G. Nagy, "Opt. Scan. Dig."; Computer; vol. 16, No. 5; pp. 13-23; May 83.
K. Sato; "2D Coordinate Input Device with CCD Camera"; Papers of Ele. Communication Soc.; 84/6, vol. J67-D, No. 6, pp. 726-727.

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