Mr. Dan Julius Profile

Dan Julius

at Beamr Imaging Ltd

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Proceedings Article | 6 September 2019 Presentation + Paper

Overnight large-scale subjective video quality assessment using automatic test generation and crowdsourcing Internet marketplaces

Tamar Shoham, Dror Gill, Sharon Carmel, Dan Julius

Proceedings Volume 11137, 111370R (2019) https://doi.org/10.1117/12.2528012

KEYWORDS: Video, Computer programming, Visualization, Internet, Video coding, Video processing, Standards development, Information visualization

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Subjective quality feedback by actual human viewers is crucial for reliable evaluation of various solutions and configurations for video processing or encoding. However, it is generally a time consuming and expensive process. Therefore, in many cases evaluation of video quality is done using objective measures, which may be poorly correlated with actual subjective results. In order to address this issue, we have developed VISTA (VIsual Subjective Testing Application), an easy to use application for visually comparing pairs of video sequences played synchronously side by side, and a user interface for indicating the relative subjective quality of the two video sequences. In addition, we developed a system for automating the evaluation process called Auto-VISTA. The system receives as input guidelines for the required testing session, prepares the content to be compared, launches the app in a crowdsourcing Internet marketplace (such as Amazon Mechanical Turk), and performs collection and analysis of the results. Thus, obtaining large scale subjective feedback becomes cheap and accessible, which in turn allows for fast and reliable evaluation cycles of different video encoding and processing solutions, or tuning various configurations and settings for a given solution.

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