Mini-symposium on Image and Video Quality Assessment

Who: Prof Zhou Wang and Dr Hantao Liu

When: 28 September – 2:30pm

Where: PRJG4007

Speaker 1: Prof Zhou Wang, University of Waterloo, Canada

Title: Objective Image Quality Assessment –What’s Beyond

Abstract: Images and videos are subject to a wide variety of distortions during acquisition, processing, compression, transmission and reproduction. Humans can effortlessly identify image quality degradations. By contrast, objective evaluation of perceived image quality turns out to be a challenging task. In the past decade, there has been an accelerated interest in objective image quality assessment methodologies, whose roles are not only to monitor image quality degradations and to benchmark image processing systems, but also to optimize a large variety of image and video processing methods. In this talk, after a brief overview on the current status of objective image and video quality assessment, we will focus on a rapidly growing research area, where objective quality models are employed as the optimization criteria in the development of novel image processing algorithms and systems. We believe this area bears ample opportunities along with great challenges, and is where the eventual benefit lies.

Biosketch: Zhou Wang is currently a Professor in the Department of Electrical and Computer Engineering, University of Waterloo. His research interests include image processing, coding, communication, and quality assessment; computational vision and pattern analysis; multimedia coding and communications; and biomedical signal processing. He has more than 100 publications in these fields with more than 25,000 citations. His work on structural similarity (SSIM) based image and video quality assessment has received wide citations in academia as well as broad usage in the industry. Dr. Wang is a Fellow of IEEE, and a recipient of 2014 Steacie Memorial Fellowship Award, 2013 IEEE Signal Processing Society Best Magazine Paper Award, and 2009 IEEE Signal Processing Society Best Paper Award. He has served as a Member of IEEE Multimedia Signal Processing Technical Committee, and an Associate Editor of IEEE Transactions on Image Processing, IEEE Signal Processing Letters, and Pattern Recognition.

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Speaker 2: Dr Hantao Liu, Cardiff University, UK

Title: The Application of Visual Saliency Models in Objective Image Quality Assessment

Abstract: Advances in image quality assessment have shown the potential added value of including visual attention aspects in its objective assessment. Numerous models of visual saliency are implemented and integrated in different image quality metrics (IQMs), but the gain in reliability of the resulting IQMs varies to a large extent. The causes and the trends of this variation would be highly beneficial for further improvement of IQMs, but are not fully understood. In this talk, we will discuss about an exhaustive benchmark study, where the capabilities and potential limitations of computational saliency in IQMs are assessed. We intend to supply practitioners with a useful guidance for applying saliency models in IQMs, in terms of the effect of saliency model dependence, IQM dependence, and image distortion dependence.

Biosketch: Hantao Liu is currently an Assistant Professor in the School of Computer Science and Informatics, Cardiff University (UK). He received the MSc degree from the University of Edinburgh (UK) and the PhD degree from the Delft University of Technology (The Netherlands) in 2005 and 2011, respectively. His PhD thesis focused on Modelling Perceived Quality for Imaging Applications. He is a founder member of the Delft Image Quality Lab. His research interests include visual media quality assessment, visual attention modelling and applications, visual scene understanding, medical image perception, and user experience in healthcare. He served as a Management Committee member (UK representative) of COST Action IC1003 Qualinet: European Network on Quality of Experience in Multimedia Systems and Services, and Area Chair of IEEE International Conference on Multimedia and Expo 2015. He is now serving as the Chair of IEEE MMTC Interest Group on Quality of Experience for Multimedia Communications. He is serving as an Associate Editor for the following international journals: IEEE Transactions on Human-Machine Systems; Signal Processing: Image Communication; Signal, Image and Video Processing; and Neurocomputing.

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