Dynamic range enhancement method and apparatus

Details Dynamic range enhancement method and apparatus Dynamic range enhancement method and apparatus

2008-11-26

2011-12-06

Chan, Jason (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S362000

Reexamination Certificate

active

08072516

ABSTRACT:
A dynamic range enhancement method and apparatus for an imaging device expands a dynamic range of an input image without an associated increase in the amount of image calculations. The dynamic range enhancement method includes producing brightness information and color information from an input image; applying gamma correction and inverse gamma correction to the brightness information to produce a gamma corrected image and an inverse gamma corrected image; comparing variances of the gamma corrected image and the inverse gamma corrected image at identical spots; and expanding a dynamic range of the input image by selecting one of the variances at each spot. The dynamic range of an input image is expanded by applying a post imaging process without increasing calculation amount of the imaging device.

REFERENCES:
patent: 6492868 (2002-12-01), Kirn
patent: 7330286 (2008-02-01), Fukasawa
patent: 7511770 (2009-03-01), Blonde et al.
patent: 7933445 (2011-04-01), Pan et al.
patent: 2002/0181000 (2002-12-01), Fukasawa et al.
patent: 2004/0119874 (2004-06-01), Imai
patent: 2006/0164524 (2006-07-01), Shibano et al.
patent: 2007/0153305 (2007-07-01), Reid

Affiliated with

Also associated with

Rating

Dynamic range enhancement method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dynamic range enhancement method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic range enhancement method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4307820