适配化身：虚拟现实中自我化身的自动骨骼调整
Fitted avatars: automatic skeleton adjustment for self-avatars in virtual reality
AI总结：
针对虚拟现实自我化身手动骨骼尺寸匹配耗时易错的问题，提出仅需HMD、两个手柄和三个追踪器、用户做简单动作即可自动提取尺寸调整骨骼的方法，可减少IK系统错位。
摘要：
在元宇宙时代，自我化身正日益普及，它们能在用户沉浸于虚拟现实时增强临场感并提供具身感。在协作式虚拟现实中，自我化身对于通过手势改善沟通也至关重要。无论我们使用的是复杂的动作捕捉方案，还是配备逆运动学（IK）的少量追踪器，化身与用户的尺寸匹配都至关重要，否则自我化身的姿势不匹配可能会被用户察觉。为实现这种精确的尺寸匹配，通常需要手动流程，即需要另一个人测量肢体尺寸并将数据录入系统。这一流程既耗时又容易出错。本文提出了一种自动测量方法，用户只需佩戴头戴式显示器（HMD）、两个手部控制器和三个追踪器，完成一组简单的动作即可。我们的工作提供了一种经济且快速的方法，可自动提取用户的身体尺寸，并将虚拟人形骨骼调整至精确尺寸。实验结果表明，与其他仅根据HMD高度对化身进行统一缩放、并假设关节相对于追踪器位置的解决方案相比，我们的方法能够减少IK系统产生的错位问题。
英文摘要：
In the era of the metaverse, self-avatars are gaining popularity, as they can enhance presence and provide embodiment when a user is immersed in Virtual Reality. They are also very important in collaborative Virtual Reality to improve communication through gestures. Whether we are using a complex motion capture solution or a few trackers with inverse kinematics (IK), it is essential to have a good match in size between the avatar and the user, as otherwise mismatches in self-avatar posture could be noticeable for the user. To achieve such a correct match in dimensions, a manual process is often required, with the need for a second person to take measurements of body limbs and introduce them into the system. This process can be time-consuming, and prone to errors. In this paper, we propose an automatic measuring method that simply requires the user to do a small set of exercises while wearing a Head-Mounted Display (HMD), two hand controllers, and three trackers. Our work provides an affordable and quick method to automatically extract user measurements and adjust the virtual humanoid skeleton to the exact dimensions. Our results show that our method can reduce the misalignment produced by the IK system when compared to other solutions that simply apply a uniform scaling to an avatar based on the height of the HMD, and make assumptions about the locations of joints with respect to the trackers.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
