Manual-scanning image reader

Details Manual-scanning image reader Manual-scanning image reader

1986-08-21

1988-05-03

Groody, James J.

Image analysis

Histogram processing

For setting a threshold

382 58, 358294, G06K 922

Patent

active

047425598

ABSTRACT:
A manual-scanning image reader which optically reads image such as characters and figures from a written surface by a manual scanning over said written surface, which consists of the following parts; a sensor for detecting the amount of movement of the image reader in the scanning direction as a linear movement sensor, a sensor for detecting the amount of deviation of the image reader in the direction perpendicular to the scanning direction as a deviation sensor and a device for reading in image data synchronously with output signals from the linear movement sensor in order to correct the input image data according to the output signals from the deviation sensor before eventually storing it in memory.

REFERENCES:
patent: 4523235 (1985-06-01), Rajchman
patent: 4581761 (1986-04-01), Ichinokawa et al.

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