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Publication - Professor David Bull

    A Study of Subjective Video Quality at Various Spatial Resolutions


    Mackin, A, Afonso, MF, Zhang, A & Bull, D, 2018, ‘A Study of Subjective Video Quality at Various Spatial Resolutions’. in: 2018 25th IEEE International Conference on Image Processing (ICIP 2018). Institute of Electrical and Electronics Engineers (IEEE), pp. 2830-2834


    In this paper we present the BVI-SR video database, which contains 24 unique video sequences at a range of spatial resolutions up to UHD-1 (3840p). These sequences were used as the basis for a large-scale subjective experiment exploring the relationship between visual quality and spatial resolution when using three distinct spatial adaptation filters (including a CNN-based super-resolution method). The results demonstrate that while spatial resolution has a significant impact on mean opinion scores (MOS), no significant reduction in visual quality between UHD-1 and HD resolutions for the super-resolution method is reported. A selection of image quality metrics were benchmarked on the subjective evaluations, and analysis indicates that VIF offers the best performance.

    Full details in the University publications repository