Scanner focussing method and apparatus concurrently displaying m

Details Scanner focussing method and apparatus concurrently displaying m Scanner focussing method and apparatus concurrently displaying m

1995-04-04

1996-08-06

Zimmerman, Brian

Television

Special applications

Film, disc or card scanning

355 56, 358527, H04N 5253, H04N 947

Patent

active

055438334

ABSTRACT:
An image input apparatus, or "scanner," capable of adjusting the focal point of an image-forming optical system and pre-scanning the same portion of an original document for various focal points of the image-forming optical system. The various pre-scan images are displayed side-by-side on a display device so that an operator can compare images and select an appropriate focal point. The scanner includes an image-forming optical system which forms an image of an original source, an image pickup unit, positioned so as to correspond with the image-forming optical system, for sensing the image formed by the image-forming optical system, an adjustment mechanism for adjusting the focus of the image-forming optical system, and a display device, interfaced to the image pickup unit, for displaying the image sensed by the image pickup unit. A control device controls the image forming optical systems so that a partial area of the original source is scanned and displayed on the display device, wherein the control device causes a scan of the partial area of the original source up to a specified number of times and displays the results of the partial scanning for the specified number of times side by side on the display device. A method is also provided for scanning an original source and displaying multiple partial scans on a display device.

REFERENCES:
patent: 4349836 (1982-09-01), Sawano
patent: 4819073 (1989-04-01), Bridges
patent: 4858003 (1989-08-01), Wirt et al.
patent: 5191406 (1993-03-01), Brandestini et al.

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