Large subjectively annotated datasets are crucial to the development and testing of objective video quality measures (VQMs). In this work we focus on the recently released ITS4S dataset. Relying on statistical tools, we show that the content of the dataset is rather heterogeneous from the point of view of quality assessment. Such diversity naturally makes the dataset a worthy asset to validate the accuracy of video quality metrics (VQMs). In particular we study the ability of VQMs to model the reduction or the increase of the visibility of distortion due to the spatial activity in the content. The study reveals that VQMs are likely to overestimate the perceived quality of processed video sequences whose source is characterized by few spatial details. We then propose an approach aiming at modeling the impact of spatial activity on distortion visibility when objectively assessing the visual quality of a content. The effectiveness of the proposal is validated on the ITS4S dataset as well as on the Netflix public dataset.

Investigating Prediction Accuracy of Full Reference Objective Video Quality Measures through the ITS4S Dataset / FOTIO TIOTSOP, Lohic; Servetti, Antonio; Masala, Enrico. - STAMPA. - (2020). ((Intervento presentato al convegno Human Vision and Electronic Imaging (HVEI) 2020 tenutosi a Burlingame, CA, USA nel Jan 2020 [10.2352/ISSN.2470-1173.2020.11.HVEI-093].

Investigating Prediction Accuracy of Full Reference Objective Video Quality Measures through the ITS4S Dataset

Lohic Fotio Tiotsop;Antonio Servetti;Enrico Masala
2020

Abstract

Large subjectively annotated datasets are crucial to the development and testing of objective video quality measures (VQMs). In this work we focus on the recently released ITS4S dataset. Relying on statistical tools, we show that the content of the dataset is rather heterogeneous from the point of view of quality assessment. Such diversity naturally makes the dataset a worthy asset to validate the accuracy of video quality metrics (VQMs). In particular we study the ability of VQMs to model the reduction or the increase of the visibility of distortion due to the spatial activity in the content. The study reveals that VQMs are likely to overestimate the perceived quality of processed video sequences whose source is characterized by few spatial details. We then propose an approach aiming at modeling the impact of spatial activity on distortion visibility when objectively assessing the visual quality of a content. The effectiveness of the proposal is validated on the ITS4S dataset as well as on the Netflix public dataset.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2840341