Method for adjusting image contrast

Details Method for adjusting image contrast Method for adjusting image contrast

2008-03-04

2008-03-04

Alavi, Amir (Department: 2624)

Image analysis

Histogram processing

With a gray-level transformation

C382S274000

Reexamination Certificate

active

07340091

ABSTRACT:
A method for adjusting image contrast has the steps of constructing a luminance histogram of an original image; acquiring an image characteristic of the luminance histogram; judging whether there is a peak wave or deviation of luminance existed in that image characteristic; determining a control point after performing a specific algorithm; deriving a linear equation from the control point and a contrast adjusting value in a Cartesian coordinate system; establishing a gamma table from the correspondent relationship between the horizontal and vertical axis in the coordinate, where the relationship can be calculated according to the linear equation; and finally generating a luminance value from the gamma look-up table using the input luminance of each pixel in the original image.

REFERENCES:
patent: 5799106 (1998-08-01), Mooney et al.
patent: 6148103 (2000-11-01), Nenonen
patent: 6694051 (2004-02-01), Yamazoe et al.
patent: 7199776 (2007-04-01), Ikeda et al.
patent: 2005/0163368 (2005-07-01), Hanamoto
patent: 2005/0213814 (2005-09-01), Lin
patent: 2006/0110022 (2006-05-01), Zhang et al.

Affiliated with

Also associated with

Rating

Method for adjusting image contrast 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 for adjusting image contrast, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for adjusting image contrast will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2791091