Method and apparatus for enhancing digital image quality

Details Method and apparatus for enhancing digital image quality Method and apparatus for enhancing digital image quality

2007-03-06

2007-03-06

Couso, Yon J. (Department: 2624)

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

Reexamination Certificate

active

10656835

ABSTRACT:
A method and apparatus enhances an image quality where original brightness data Xij of a concerned pixel is compared with predetermined brightness levels X1and X2, which are reference variables to obtain new brightness data Yij, with an enhanced contrast. The method sets initial values of a parameter Vbto calculate the brightness level X1, a parameter Vpto calculate the brightness level X2, the brightness level X1, and the brightness level X2, and compares the brightness data Xij with Vband Vp. The method resets Vband Vpaccording to comparison results and identifies a background area according to the comparison results between the brightness data Xij and parameter X1or X2, and performs the contrast enhancement on pixels belonging to the background area, and updates the brightness levels X1and X2using Vband Vpwhen the concerned pixel is the last one in the concerned line.

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