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Featured researches published by Feng Xu.


quality of multimedia experience | 2009

No Reference Block Based Blur Detection

Debing Liu; Zhibo Chen; Huadong Ma; Feng Xu; Xiaodong Gu

Blur is one of the most important features related to image quality. Accurately estimating the blur level of an image is of great help to estimate its quality. In this paper, a No Reference Block-based Blur Detection (NR-BBD) algorithm is proposed. It calculates the local blur at the boundaries of Macro Blocks (MBs) and then averages all of them to get the blur of the image. A content dependent weighting scheme is employed to reduce the influence from the texture. Compared with traditional edge based blur metrics, NR-BBD has a lower complexity, exhibits more stable for different image content, and results in a higher correlation with the perceived subjective visual quality (the resulting Pearson Correlation is 0.85 in the data set with 1176 images with different content type and different quality level.).


Archive | 2010

METHOD FOR MEASURING VIDEO QUALITY USING A REFERENCE, AND APPARATUS FOR MEASURING VIDEO QUALITY USING A REFERENCE

Xiaodong Gu; Debing Liu; Feng Xu; Zhibo Chen


Archive | 2010

Method and apparatus for measuring video quality using at least one semi -supervised learning regressor for mean observer score prediction

Feng Xu; Zhibo Chen; Debing Liu; Xiaodong Gu


Archive | 2010

Blur measurement in a block-based compressed image

De Bing Liu; Zhi Bo Chen; Xiao Dong Gu; Feng Xu


Archive | 2010

Method and apparatus for determining blur in an image

De Bing Liu; Zhi Bo Chen; Xiao Dong Gu; Feng Xu


Archive | 2010

METHOD AND DEVICE FOR AUTOMATIC PREDICTION OF A VALUE ASSOCIATED WITH A DATA TUPLE

Feng Xu; De Bing Liu; Xiao Dong Gu; Zhi Bo Chen


Archive | 2017

processo e dispositivo para cálculo de borrão em imagens de vídeo

De Bing Liu; Feng Xu; Zhi Bo Chen


Archive | 2010

Mesure de flou dans une image compressée à base de blocs

Zhibo Chen; Debing Liu; Xiaodong Gu; Feng Xu


Archive | 2010

Method of processing an image and corresponding device

Debing Liu; Zhibo Chen; Xiaodong Gu; Feng Xu


Archive | 2010

METHOD FOR PROCESSING AN IMAGE

Debing Liu; Zhibo Chen; Xiaodong Gu; Feng Xu

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Huadong Ma

Beijing University of Posts and Telecommunications

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