Apparatus and method to enhance a contrast using histogram...

Details Apparatus and method to enhance a contrast using histogram... Apparatus and method to enhance a contrast using histogram...

2006-11-28

2006-11-28

Tran, Phuoc (Department: 2621)

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

Reexamination Certificate

active

07142724

ABSTRACT:
An apparatus and method to enhance a contrast includes a first operation part, a second operation part, and a mapping part. The first operation part calculates an average and a standard deviation of an input image. The second operation part calculates an average and a standard deviation of a target image based on the average and the standard deviation of the input image. The mapping part converts a pixel value of the input image by a mapping function generated by receiving the averages and the standard deviations of the input image and the target image from the first operation part and the second operation part, respectively, and outputs a pixel value of an output image.

REFERENCES:
patent: 6594388 (2003-07-01), Gindele et al.
patent: 2004/0136570 (2004-07-01), Ullman et al.
patent: 05-244508 (1993-09-01), None
patent: 08-195903 (1996-07-01), None
patent: 2000-506284 (2000-05-01), None
Japanese Office Action in Patent Application No. 2003-027655, filed Feb. 4, 2003.

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