Image reading device capable of performing shading correction

Details Image reading device capable of performing shading correction Image reading device capable of performing shading correction

1993-12-08

1996-03-19

Kuntz, Curtis

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 140

Patent

active

055007457

ABSTRACT:
A digitized image data produced by reading a certain scanning line portion of a shading correction plate by an image sensor is stored in a buffer memory as digital data B. A digital comparator compares, on a pixel-by-pixel basis, the digital data B with new digital data A produced by reading another scanning line portion apart from the above portion by a distance of a plurality of scanning lines. This comparison is repeated while the reading line portion on the correction plate is changed until a difference between the data B and the new data A becomes smaller than a predetermined value for all the pixels. The data of one scanning line finally stored in the buffer memory is transferred to a shading correction data memory.

REFERENCES:
patent: 4520395 (1985-05-01), Abe
patent: 4760464 (1988-07-01), Sakano
patent: 4806780 (1989-02-01), Yamamoto et al.
patent: 4829379 (1989-05-01), Takaki
patent: 5062144 (1991-10-01), Murakami

Affiliated with

Also associated with

Rating

Image reading device capable of performing shading correction does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image reading device capable of performing shading correction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image reading device capable of performing shading correction will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1962233