Image reading device and method for correcting image exposure da

Details Image reading device and method for correcting image exposure da Image reading device and method for correcting image exposure da

1995-05-01

1998-02-24

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358474, 358475, 358497, H04N 1028

Patent

active

057216266

ABSTRACT:
An image reading device comprises a line sensor that moves in an auxiliary scanning direction, a resolution setting device which sets the resolution of the line sensor in the auxiliary scanning direction, an exposure correction value setting device that sets an exposure correction value when the image is read, and a control device that performs exposure correction by multiplying the moving velocity of the line sensor and the accumulation time of the line sensor by correction factors. To correct the base concentration while reducing the effects of deterioration of the S/N ratio and level-skipping, a rough adjustment of the exposure is conducted by a gain circuit, a fine adjustment is conducted with reference to a first look-up table, and a further fine adjustment of the original document base concentration is conducted with reference to a second look-up table.

REFERENCES:
patent: 4692797 (1987-09-01), Matsumoto
patent: 5038227 (1991-08-01), Koshiyouji et al.
patent: 5357351 (1994-10-01), Nakajima et al.

Affiliated with

Also associated with

Rating

Image reading device and method for correcting image exposure da 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 and method for correcting image exposure da, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image reading device and method for correcting image exposure da will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1878150