Black reference data calculation method and image reader

Details Black reference data calculation method and image reader Black reference data calculation method and image reader

2005-05-24

2005-05-24

Grant, II, Jerome (Department: 2626)

Facsimile and static presentation processing

Natural color facsimile

Black signal synthesis

C358S521000, C358S504000, C358S509000

Reexamination Certificate

active

06897989

ABSTRACT:
A light source is turned off (S101), incidence of light on a line sensor is shut off, and the output value of an electric signal output from each of pixels of the line sensor (S102). Since the output value is detected 128 times (S103), random noise can be reduced equal to or less than the variation in the output values for each pixel of the line sensor. The output values detected by a detection section are added up by an average value difference calculation section (S104). The sum total of the output values is divided by the number of detection times (S105) to calculate the average value of the output values (S106). The average value difference calculation section calculates the difference between a setup value and the average value as an average value difference (S107) and the average value difference is stored in black reference memory for each pixel (S108). The average value difference is stored in the black reference memory, so that the storage capacity can be decreased as compared with the case where black reference data itself is stored.

REFERENCES:
patent: 4903144 (1990-02-01), Stefanik et al.
patent: 4912558 (1990-03-01), Easterly et al.
patent: 5070414 (1991-12-01), Tsutsumi
patent: 5644409 (1997-07-01), Irie et al.
patent: 5677522 (1997-10-01), Rice et al.
patent: 6219460 (2001-04-01), Tatsuta
patent: 6822679 (2004-11-01), Kulhalli et al.
patent: 0 585 124 (1994-03-01), None
patent: 0 957 628 (1999-11-01), None
patent: 4-25285 (1992-01-01), None
patent: 2001257880 (2001-09-01), None

Affiliated with

Also associated with

Rating

Black reference data calculation method and image reader does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Black reference data calculation method and image reader, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Black reference data calculation method and image reader will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3446896