Jin Chongchong, Chen Yeyao
College of Science and Technology, Ningbo University, Ningbo 315300, China.
Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211, China.
Entropy (Basel). 2025 Jan 7;27(1):44. doi: 10.3390/e27010044.
Arbitrary translational Six Degrees of Freedom (6DoF) video represents a transitional stage towards immersive terminal videos, allowing users to freely switch viewpoints for a 3D scene experience. However, the increased freedom of movement introduces new distortions that significantly impact human visual perception quality. Therefore, it is crucial to explore quality assessment (QA) to validate its application feasibility. In this study, we conduct subjective and objective QAs of arbitrary translational 6DoF videos. Subjectively, we establish an arbitrary translational 6DoF synthesized video quality database, specifically exploring path navigation in 3D space, which has often been limited to planar navigation in previous studies. We simulate path navigation distortion, rendering distortion, and compression distortion to create a subjective QA database. Objectively, based on the spatio-temporal distribution characteristics of various distortions, we propose a no-reference video quality assessment (VQA) metric for arbitrary translational 6DoF videos. The experimental results on the established subjective dataset fully demonstrate the effectiveness and superiority of the proposed objective method.
任意平移六自由度（6DoF）视频代表了向沉浸式终端视频过渡的一个阶段，允许用户自由切换视点以体验3D场景。然而，运动自由度的增加引入了新的失真，这对人类视觉感知质量产生了显著影响。因此，探索质量评估（QA）以验证其应用可行性至关重要。在本研究中，我们对任意平移6DoF视频进行主观和客观质量评估。主观上，我们建立了一个任意平移6DoF合成视频质量数据库，特别探索了3D空间中的路径导航，而在以往研究中这通常仅限于平面导航。我们模拟路径导航失真、渲染失真和压缩失真来创建一个主观质量评估数据库。客观上，基于各种失真的时空分布特征，我们提出了一种用于任意平移6DoF视频的无参考视频质量评估（VQA）指标。在已建立的主观数据集上的实验结果充分证明了所提出的客观方法的有效性和优越性。
