Linearity Improvement of Mosquito Noise Level Estimation from Decoded Picture

Naoya SAGARA  Yousuke KASHIMURA  Kenji SUGIYAMA  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E94-A   No.2   pp.548-551
Publication Date: 2011/02/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E94.A.548
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Image Media Quality)
Category: Evaluation
Keyword: 
DCT coding,  block artifact,  mosquito noise,  non reference estimation,  

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Summary: 
DCT encoding of images leads to block artifact and mosquito noise degradations in the decoded pictures. We propose an estimation to determine the mosquito noise block and level; however, this technique lacks sufficient linearity. To improve its performance, we use the sub-divided block for edge effect suppression. The subsequent results are mostly linear with the quantization.