在信息全球化的浪潮和媒介数字化的进程下，传统视频媒介中的字幕已不再仅作为听觉线索的简单附加物，逐渐演变出一种“字幕商品化（Commoditisation of Subtitling）”趋势，字幕的发展完成了从影像边缘地位到视听内容固有组成部分的转变。VR技术提供的全景观看模式与三维立体空间，使得传统字幕的一些视听语言规则在VR影像中不再适用，不合理的字幕设计将破坏虚拟环境中用户的沉浸感和获取度。因此，为了提高参与者的整体观影体验，字幕设计由原本的后置性问题变成了VR影像创作过程中不可或缺的一环，与影像内容紧密结合。当前学界基于世界参考字幕和漫画气泡字幕等类别进行了字幕位置研究，但国内外对VR字幕的规范化设计与应用研究仍非常欠缺，亟需相关研究以填补该领域的空缺。基于此，本研究聚焦6DoF技术加持下的VR场景字幕表达方式，从辅助剧情理解、氛围烘托、视觉引导、交互增强和空间塑造5个方面对VR影像字幕的优化设计特点进行了系统、深入的分析，总结出基于VR视场角的可读性、基于立体空间的图底关系、基于视觉习惯的动态适应和基于自然交互的补充提醒4大设计原则，为VR影像内容创作中的字幕设计提供重要的参考。
本研究首先梳理了字幕设计发展历程，厘清传统影像与游戏中的字幕表现方式。第3章，从VR媒介特定属性入手，追溯VR影像发展演变，并分析VR媒介对字幕设计的全新要求。第4章，筛选出10部具代表性的国内外VR影像作品，并按照辅助剧情理解、氛围烘托、视觉引导、交互增强等核心功能，及空间塑造附属功能，分类研究其字幕的设计特点，为后续设计方法的归纳总结奠定基础。第5章，基于典型案例分析与交互设计的基本原则，概括出适用于VR影像字幕的设计方法，包括基于VR视场角的可读性、基于立体空间的图底关系、基于视觉习惯的动态适应和基于自然交互的补充提醒等设计方法。
随着VR技术的不断成熟和创作理念的不断进化，可以期待字幕在未来的VR体验中将扮演更加多元化的角色，在VR中的应用呈现出越来越重要的趋势。在保证文字信息传达的清晰可读的基础上，字幕的设计需要把用户的体验需求作为设计的首要考量，通过精心的设计与实践，确保字幕自然而不显突兀地与内容和环境相融合，以增强用户的沉浸体验。

In the wake of information globalization and the digitization of media, subtitles in traditional video mediums have transcended their original role as mere supplementary auditory cues. This evolution has given rise to a trend of 'Commoditization of Subtitling', marking the transition of subtitles from a peripheral element to an intrinsic component of audio-visual content. The panoramic viewing mode and three-dimensional spatial experience offered by VR technology render some traditional audio-visual language rules of subtitles inapplicable within VR. Inappropriate subtitle design can disrupt the immersive experience and comprehension within the virtual environment. Therefore, to enhance the overall viewing experience of participants, the design of subtitles has evolved from being an afterthought to an indispensable aspect of the VR content creation process, closely integrated with the image content. Current academic research has explored subtitle positioning based on world-referenced subtitles and comic bubble subtitles among other categories. However, there remains a significant lack of standardized design and application research for VR subtitles both domestically and internationally, underlining a critical need for related studies to fill this gap. Building on this premise, this study focuses on subtitle expression in VR scenes enhanced by 6DoF (Six Degrees of Freedom) technology. It conducts a systematic and in-depth analysis of the optimization design characteristics of VR image subtitles from five aspects: assisting in plot comprehension, atmosphere enhancement, visual guidance, interaction amplification, and spatial molding. Summarizes four major design methods: readability based on the VR field of view, figure-ground relationship based on three-dimensional space, dynamic adaptation based on visual habits, and supplementary reminders based on natural interaction. These principles offer crucial reference points for subtitle design in the creation of VR image content.

This study initiates with an exploration of the historical development of subtitle design, clarifying the representation of subtitles in traditional film and video games. Chapter 3 starts from the specific attributes of VR media, tracing the evolution of VR imagery and analyzing the novel requirements VR media imposes on subtitle design. Chapter 4 selects ten representative VR image works from both domestic and international sources. It categorizes the subtitles within these works according to their core functions such as aiding plot comprehension, enhancing atmosphere, guiding vision, and enhancing interaction, as well as their auxiliary function in spatial molding. Building on this foundation, the study examines the design characteristics of subtitles for each function, laying a groundwork for the subsequent induction and summary of design methodologies. Chapter 5, drawing from typical case analyses and the basic principles of interaction design, summarises design methods suitable for VR image subtitles, including readability based on the VR field of view, the figure-ground relationship based on three-dimensional space, dynamic adaptation based on visual habits, and supplementary reminders based on natural interaction.
As VR technology matures and creative concepts continue to evolve, subtitles are anticipated to play an increasingly diversified role in future VR experiences, presenting a growing trend of significance in VR applications. While ensuring the clarity and readability of textual information, the design of subtitles needs to prioritize user experience needs. Through meticulous design and practice, it is essential to ensure that subtitles integrate seamlessly and unobtrusively with content and context, thereby enhancing the user immersive experience.