Method and apparatus for reading image information

Details Method and apparatus for reading image information Method and apparatus for reading image information

2005-12-13

2005-12-13

Coles, Edward (Department: 2622)

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

C358S446000, C358S447000, C358S461000, C358S463000, C358S504000, C358S475000, C358S509000, C382S270000, C382S273000

Reexamination Certificate

active

06975433

ABSTRACT:
An image information reading apparatus that can obtain high quality images without an effect of noise and a photographing condition or the like is realized even in the case where a low-bit A/D converter is used. The apparatus comprises control means for switching between pre-reading to main reading, characteristic determination means for determining, by analyzing an electric signal obtained by the pre-reading, a normalization processing characteristic used in normalization processing on an electric signal obtained by the main reading, and normalization processing means for carrying out the normalization processing on the electric signal in the main reading according to the determined normalization processing characteristic. The characteristic determination means analyzes image data by using a cumulative histogram of pre-reading data, and determines the normalization processing characteristic so that an image represented by the image data has adequate density and contrast.

REFERENCES:
patent: 4803359 (1989-02-01), Hosoi et al.
patent: 4982232 (1991-01-01), Naito
patent: 5223954 (1993-06-01), Miyakawa et al.
patent: 5726771 (1998-03-01), Gann et al.
patent: 5991010 (1999-11-01), Nishio
patent: 0 898 421 (1999-02-01), None
patent: 59-211263 (1984-11-01), None
patent: 1-216290 (1989-08-01), None
patent: 2-164067 (1990-06-01), None
patent: 9-222114 (1997-08-01), None
patent: 92/06501 (1992-04-01), None
Material Parameters In Thick Hydrogenated Amorphous Silicon Radiation Detectors, University of California, Berkeley.
IEEE, vol. 36, No. 2, Apr. 1989, Metal/Amorphous Silicon Multilayer Radiation Detectors, Yujiro Naruse and Tamotsu Hatayama.
Abstract, 02-164067, Jun. 25, 1960.
Abstract, 01-216290, Aug. 30, 1989.

Affiliated with

Also associated with

Rating

Method and apparatus for reading image information does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for reading image information, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reading image information will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3497349