深海视频质量是保证深海科学研究顺利开展的重要前提。面向传统视频应用建立的质量评价方法无法对“以深海科研为目的，具有空间弱可视性和时间不稳定性特点”的深海视频做出客观、有效的质量评价。本项目研究基于科学有用性的深海视频质量评价方法，重点解决以下问题：（1）考虑深海视频的特殊应用背景，以定性研究结合量化分析，提出深海视频质量基于科学有用性的合理度量；（2）以科学有用性质量判别为目标，基于心理测量理论提出高效的深海视频主观质量评价方法，建立主观质量评价样本集；（3）针对深海视频的特点，基于轻量级半监督深度学习设计时、空特征获取和质量分类网络，提出快速、准确的深海视频科学有用性客观质量评价模型。通过解决以上关键技术问题，搭建在线深海视频主观和客观质量评价系统，对课题所提出的理论和方法进行验证，并为深海视频增强技术等提供可靠的质量评价基准和服务。

Deep sea video quality is an important prerequisite to ensure the smooth development of deep sea scientific research. Existing video quality assessment methods established for traditional video applications cannot make objective and effective quality assessment for deep sea videos, which serve for ocean scientific research and are featured with weak visibility and instability in spatial and temporal dimensions. This project studies a methodology of scientific usability-based deep ocean video quality assessment, focusing on addressing the following research aspects: (1) Considering the special application background of deep sea videos, this study will put forward reasonable measurement scales of deep sea video quality based on scientific usability, using a mixed method of qualitative and quantitative analysis. (2) With the purpose of discriminating the scientific usability, this study will propose an efficient method of subjective quality assessment of deep sea video based on psychometric theory, and provide a quality assessment dataset based on the subjective quality assessment tests. (3) In view of the weak visibility and instability of deep sea videos, this study will propose a fast and accurate objective quality assessment model for deep sea videos based on the lightweight semi-supervised depth learning, designing the spatial and temporal feature extraction and quality classification network. By solving the above key technical problems, an online deep sea video subjective and objective quality assessment system will be constructed to verify the theory and the method proposed by this project, and to provide a reliable evaluation benchmark and an effective measurement service for deep sea video quality enhancement technologies.