Ms. Zhijiao Huang Profile

Zhijiao Huang

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Proceedings Article | 2 November 2018 Paper

New quality assessment method for dense light fields

Zhijiao Huang, Mei Yu, Haiyong Xu, Yang Song, Hao Jiang, Gangyi Jiang

Proceedings Volume 10817, 1081717 (2018) https://doi.org/10.1117/12.2502277

KEYWORDS: Distortion, Databases, Image quality, Feature extraction, Visualization, Video, Cameras, 3D image processing, Spatial resolution

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Light field has richer scene information than traditional images, including not only spatial information but also directional information. Aiming at multiple distortion problem of dense light field, combining with spatial and angular domain information, a light field image quality assessment method based on dense distortion curve analysis and scene information statistics is proposed in this paper. Firstly, the mean difference between all multi-view images in the angular domain of dense light field is extracted, and a corresponding distortion curve is drawn. Three statistical features are obtained by fitting the curve, which are slope, median and peak, respectively represent the distortion deviation, interpolation period and the maximum distortion. Then, the mean information entropy and mean gradient magnitude of the light field are extracted as the global and local features of the spatial domain. Finally, the extracted features are trained and tested by the Support Vector Regression. The experiment is conducted on the public MPI dense light field database. Experimental results show that the PLCC of the proposed method is 0.89, better than the existing methods, especially for different types of distorted contents.

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