Methodology for fine-grained monitoring of the quality perceived by users on 360VR contents

Abstract To properly evaluate the performance of 360VR-specific encoding and transmission schemes, and particularly of solutions based on viewport adaptation, it is necessary to consider not only the bandwidth saved, but also the quality of the portion of the scene actually seen by users over time. With this motivation, we propose a robust, yet flexible methodology for fine-grained monitoring of the quality within the viewport along the visualization session. This novel procedure is based on a complete analysis of the geometric relations involved. Moreover, the designed methodology allows for both offline and online usage by using different approximations. In this way, our methodology can be used regardless of the approach considered to properly evaluate the implemented strategy, obtaining a fairer comparison between them.