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首页> 外文期刊>Current Directions in Biomedical Engineering >Superimposing holograms on real world objects using HoloLens 2 and its depth camera
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Superimposing holograms on real world objects using HoloLens 2 and its depth camera

机译：使用Hololens 2及其深度相机叠加在现实世界对象上的全息图

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摘要

Augmented Reality glasses such as HoloLens 2 may provide visual guidance during surgical interventions. To superimpose the holograms on real world objects (RWO), for instance a patient, spatial registration is required. In this work, we propose an approach to automatically register a hologram to the according RWO. To this end, the framework utilizes the depth camera of HoloLens 2 to acquire the point cloud (PC) of the RWO. A novel and recently published PC registration algorithm allows to register the PC of the RWO and the hologram after a rough initial placement without any need for pre-processing or outlier removal. The approach is evaluated by measuring displacements between certain known positions of the hologram and the RWO. The first metric relies on measuring points using an optically tracked stylus while the second is based on visually perceived positions. The median displacements were 22.3 mm, 35.6 mm, and 13.3 mm for the x-, y-, and z-axes in the first metric and 8.1 mm, 4.3 mm, and 11.9 mm for the second metric. Even though the accuracy is not yet adequate for many surgical interventions, the framework provides an initial step for a convenient marker less registration of holograms to an RWO.
机译：在手术干预期间，增强现实眼镜如狼人2可以提供视觉指导。为了叠加真实世界对象（RWO）的全息图，例如患者，需要空间注册。在这项工作中，我们提出了一种自动注册全息图的方法。为此，该框架利用Hololens 2的深度摄像机获取RWO的点云（PC）。一部小说和最近公开的PC登记算法允许在粗略的初始放置后注册RWO和全息图的PC，而无需预处理或远离拆卸。通过测量全息图和RWO的某些已知位置之间的位移来评估该方法。第一个度量依赖于使用光学跟踪的触控笔测量点，而第二则基于视觉上感知的位置。第一公制的X-，Y和Z轴和8.1毫米，4.3毫米和11.9毫米的X-，Y和Z轴，中值位移为22.3毫米，35.6毫米和13.3毫米。即使准确性尚未足够适用于许多外科干预措施，框架也为一个方便的标记较少登记到RWO，提供了一个初步步骤。

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