Computer input scanner incorporating multiple scanning modes

Details Computer input scanner incorporating multiple scanning modes Computer input scanner incorporating multiple scanning modes

1993-07-15

1994-04-05

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 62, 382 63, 358453, 358512, 358538, G06K 922

Patent

active

053012445

ABSTRACT:
A scanner useful as an input device for a computer is operable in two scanning modes: a prescanning mode in which subsampled images are rapidly output to the computer for substantially real-time display, and an input scanning mode in which three successive high resolution color scans are obtained. A fixed image is supported on a movable, hand-manipulated stage that interactively controls the conjugate distances of the optical system so that zooming and cropping is obtained without losing focus. By situating the control buttons for the scanning modes on the movable stage, a single hand can control zooming, cropping, and prescanning without having to interact with a keyboard or like input device to the computer.

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