Contrast optimization of images

Details Contrast optimization of images Contrast optimization of images

2006-11-29

2010-11-16

Bella, Matthew C (Department: 2624)

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

C382S168000

Reexamination Certificate

active

07835588

ABSTRACT:
Aspects of the invention relate to methods and systems for optimizing contrast of digital images and video. Because of the size limitations placed on cameras and sensors that are part of devices, it is common for images to have poor quality. Different images traditionally require different solutions as they exhibit drastically different features. Aspects allow managed control on limiting the stretching strength of a stretching function, thus maintaining the natural appearance of images, tolerable amount of noise enhancement, and contrast reduction on less desirable parts of the image. Further aspects relate to a stretching function presented as one Look Up Table (LUT), thus allowing fast computations on limited computing devices such as consumer electronic devices.

REFERENCES:
patent: 6236751 (2001-05-01), Farrell
patent: 6915024 (2005-07-01), Maurer
patent: 2003/0012437 (2003-01-01), Zaklika et al.
patent: 2007/0223067 (2007-09-01), Lee et al.
patent: 0 723 364 (1996-07-01), None
International Search Report from corresponding International Application No. PCT/IB2007/003605 dated Apr. 7, 2008.

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