Shading correction circuit and method in image processing appara

Details Shading correction circuit and method in image processing appara Shading correction circuit and method in image processing appara

1996-07-19

1999-07-06

Lee, Thomas D.

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

352461, 352463, G06K 940, H04N 140

Patent

active

059206560

ABSTRACT:
A shading correction method for an image processing system contemplates the steps of: sequentially scanning first, second and third lines of a white reference and storing a brightness value of each pixel according to each line; averaging brightness values of pixels from identical columns in the first, second and third lines to calculate first median brightness values, and generating a first new line composed of pixels having the first median brightness values; and sequentially selecting pixels of the first new line, averaging brightness values of a selected pixel and pixels on first and second sides of the selected pixel to calculate second median brightness values, and generating a second new line composed of pixels having the second median brightness values.

REFERENCES:
patent: 4523229 (1985-06-01), Kanmoto
patent: 4827351 (1989-05-01), Sakamoto
patent: 4829379 (1989-05-01), Takaki
patent: 4888492 (1989-12-01), Arimoto
patent: 4947445 (1990-08-01), Sakamoto
patent: 5001768 (1991-03-01), Mita et al.
patent: 5062144 (1991-10-01), Murakami
patent: 5267055 (1993-11-01), Sakamoto et al.
patent: 5317421 (1994-05-01), Ito
patent: 5388167 (1995-02-01), Koga et al.
patent: 5388168 (1995-02-01), Sakashita et al.
patent: 5398119 (1995-03-01), Suzuki et al.

Affiliated with

Also associated with

Rating

Shading correction circuit and method in image processing appara does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Shading correction circuit and method in image processing appara, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Shading correction circuit and method in image processing appara will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-905425