Image scanner

Details Image scanner Image scanner

1996-11-20

1999-11-09

Epps, Georgia

Photocopying

Projection printing and copying cameras

With focusing or projection screen

355 69, 355228, 355214, G03B 1328

Patent

active

059824735

ABSTRACT:
In an image reading method which executes a prescan to obtain optimum reading parameters for a main scan prior to a main scan for reading a document image, a document image is read by illuminating the document image by a specific exposure amount for the prescan and reading the document thereby, detecting the density of the document, and determining the exposure amount for illuminating said document in a main scan in accordance with the detected document density, and determining a wait time to delay the start of the main scan in accordance with the determined exposure amount of the main scan, then starting the reading of the document in a main scan after waiting the determined wait period.

REFERENCES:
patent: 4339183 (1982-07-01), Yamada et al.
patent: 4825065 (1989-04-01), Imai
patent: 4970556 (1990-11-01), Iwata
patent: 5424804 (1995-06-01), Pultorak

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