Methods and apparatus for noise reduction in digital images

Details Methods and apparatus for noise reduction in digital images Methods and apparatus for noise reduction in digital images

2011-07-19

2011-07-19

Strege, John (Department: 2624)

Image analysis

Image enhancement or restoration

Artifact removal or suppression

C382S266000

Reexamination Certificate

active

07983511

ABSTRACT:
Methods and apparatus for reducing or removing noise in digital images. Image noise reduction methods are described that may be applied to grayscale and color images, for example RGB images. An image noise reduction method may, before applying a noise filtering technique, transform the image values from linear space to flat noise space in which the noise is independent of the signal. An edge-preserving noise filtering technique may then be applied to the image in flat noise space. After noise filtering is applied, the image is transformed from flat noise space back to linear space. For color images, the flat noise space may be converted from linear color space to luminance-chrominance space before applying the noise filtering technique so that different filters can be applied to luminance and color channels. After applying the noise filtering technique, the image is converted back to linear color space.

REFERENCES:
patent: 7257271 (2007-08-01), Adams, Jr. et al.
patent: 2008/0095431 (2008-04-01), Ishiga
patent: 2009/0052775 (2009-02-01), Moon et al.
patent: 2009/0285480 (2009-11-01), Bennett et al.
patent: 2010/0189374 (2010-07-01), Tsukioka

Affiliated with

Also associated with

Rating

Methods and apparatus for noise reduction in digital images does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Methods and apparatus for noise reduction in digital images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for noise reduction in digital images will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2668877