IEEE Trans Vis Comput Graph. 2019 May;25(5):1887-1897. doi: 10.1109/TVCG.2019.2898748. Epub 2019 Feb 21.
Creating metrically accurate avatars is important for many applications such as virtual clothing try-on, ergonomics, medicine, immersive social media, telepresence, and gaming. Creating avatars that precisely represent a particular individual is challenging however, due to the need for expensive 3D scanners, privacy issues with photographs or videos, and difficulty in making accurate tailoring measurements. We overcome these challenges by creating "The Virtual Caliper", which uses VR game controllers to make simple measurements. First, we establish what body measurements users can reliably make on their own body. We find several distance measurements to be good candidates and then verify that these are linearly related to 3D body shape as represented by the SMPL body model. The Virtual Caliper enables novice users to accurately measure themselves and create an avatar with their own body shape. We evaluate the metric accuracy relative to ground truth 3D body scan data, compare the method quantitatively to other avatar creation tools, and perform extensive perceptual studies. We also provide a software application to the community that enables novices to rapidly create avatars in fewer than five minutes. Not only is our approach more rapid than existing methods, it exports a metrically accurate 3D avatar model that is rigged and skinned.
创建具有精确度量的化身对于许多应用程序非常重要，例如虚拟试衣、人体工程学、医学、沉浸式社交媒体、远程呈现和游戏。然而，由于需要昂贵的 3D 扫描仪、照片或视频的隐私问题以及难以进行准确的裁剪测量，因此创建精确代表特定个体的化身具有挑战性。我们通过创建“虚拟卡尺”来克服这些挑战，该卡尺使用 VR 游戏控制器进行简单的测量。首先，我们确定用户可以在自己的身体上可靠地进行哪些身体测量。我们发现几个距离测量值是很好的候选值，然后验证这些值与 SMPL 身体模型表示的 3D 身体形状呈线性相关。“虚拟卡尺”使新手用户能够准确地测量自己，并使用自己的身体形状创建化身。我们根据地面真实 3D 身体扫描数据评估度量精度，将该方法与其他化身创建工具进行定量比较，并进行广泛的感知研究。我们还向社区提供了一个软件应用程序，使新手能够在不到五分钟的时间内快速创建化身。我们的方法不仅比现有方法更快，而且还导出了一个具有精确度量的 3D 化身模型，该模型已经进行了装配和蒙皮。
