Improvement of Ringing Artifact Reduction Using a K-Means Method for Color Moving Pictures

Wonwoo JANG  Hagyong HAN  Wontae CHOI  Gidong LEE  Bongsoon KANG  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E93-A   No.1   pp.348-353
Publication Date: 2010/01/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E93.A.348
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Image
Keyword: 
ringing artifacts reduction,  K-means method,  color moving picture,  image processing,  

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Summary: 
This paper proposes an improved method that uses a K-means method to effectively reduce the ringing artifacts in a color moving picture. To apply this improved K-method, we set the number of groups for the process to two (K=2) in the three dimensional R, G, B color space. We then improved the R, G, B color value of all of the pixels by moving the current R, G, B color value of each pixel to calculated center values, which reduced the ringing artifacts. The results were verified by calculating the overshoot and the slope of the light luminance around the edges of test images that had been processed by the new algorithm. We then compared the calculated results with the overshoot and slope of the light luminance of the unprocessed image.