Image quality assessment based on the contourlet transform

Authors:
Junfeng Li;Wenzhan Dai;Huijiao Wang;Aiping Yang
Affiliations:
Department of Automatic control, Zhejiang Sci-Tech University, HangZhou, China;Department of Automatic control, Zhejiang Sci-Tech University, HangZhou, China;Department of Automatic control, Zhejiang Sci-Tech University, HangZhou, China;Foreign Languages School, Zhejiang University of Finance & Economics, HangZhou, China
Venue:
CAR'10 Proceedings of the 2nd international Asia conference on Informatics in control, automation and robotics - Volume 1
Year:
2010

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Abstract

Contourlet transform has excellent properties for image representation, such as multiresolution, localization and directionality, which are the key characteristics of human vision system. In this paper, a novel image quality assessment metric based on the characteristics of contourlet coefficients of images is proposed. Firstly, the original image and the distorted images are decomposed into several levels by means of contourlet transform respectively. The contourlet coefficients of the original image and the distorted images are as the referenced matrixes and the comparative matrixes respectively. Secondly, calculate the correlativity indexes between the referenced matrixes and the comparative matrixes respectively. Moreover, image quality assessment vector of every distorted image can be constructed based on the correlativity indexes values and image quality can be assessed. Performance experiments are made on image quality database with four different distortion types. Experimental results show that the proposed method improves accuracy and robustness of image quality prediction.