Image analysis – Image enhancement or restoration – Image filter
Reexamination Certificate
2004-06-07
2008-09-16
Couso, Yon J. (Department: 2624)
Image analysis
Image enhancement or restoration
Image filter
C382S233000
Reexamination Certificate
active
07426313
ABSTRACT:
A method and an apparatus of reducing the mosquito noise in a decoded image by using a noise reduction algorism that does not depend on the compression coding algorism applied to the image to be improved. The decoded compression-coded digital image is divided into blocks. The standard deviation or the “variance coefficient” of luminance values is calculated for each block of the decoded compression-coded digital image. An ε matrix for the compression-coded digital image is composed so that all components of each block of the ε matrix is filled with the standard deviations or the variance coefficients for each block. An ε filter is composed so that its ε values are expressed by the ε matrix. The decoded compression-coded digital image is applied to the ε filter to reduce the mosquito noise that arises during decoding process.
REFERENCES:
patent: 5850259 (1998-12-01), Sugiyama
patent: 7046862 (2006-05-01), Ishizaka et al.
patent: 7076113 (2006-07-01), Le Dinh
patent: 2004/0126033 (2004-07-01), Ishizaka
patent: 2004/0257455 (2004-12-01), Aoyama
Tsutomu Shohdohji et al.,An Efficient Approach to the Reduction of Mosquito Noise for the JPEG/JPEG2000 Decoded Image by Using Epsilon Filter, IS & T's NIP18: International Conference on Digital Printing Technologies, Sep.29-Oct. 4, 2002, pp. 798-802, w/Partial English Translation.
Tsutomu Shohdohji et al.,Mosquito Noise Reduction Algorithm for Decoded Image, IS & T's NIP19: International Conference on Digital Printing Technologies, Sep. 28-Oct. 3, 2003, pp. 876-879, w/Partial English Translation.
Couso Yon J.
School Foundation of Nippon Institute of Technology
LandOfFree
Method and apparatus for reduction mosquito noise in decoded... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reduction mosquito noise in decoded..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reduction mosquito noise in decoded... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3978018