Towards building a photo-realistic virtual human face for craniomaxillofacial diagnosis and treatment planning
Towards building a photo-realistic virtual human face for craniomaxillofacial diagnosis and treatment planning
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DOI：
10.1016/j.ijom.2007.02.003
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发表时间：
2007-05-01
影响因子：
2.4
通讯作者：
Hadley, D.
中科院分区：
文献类型：
--
作者：
Ayoub, A. F.;Xiao, Y.;Hadley, D.
本研究的目的是评估数字化构建虚拟人脸的可行性，通过将真实感三维（3D）软组织表面以正确的关系叠加在骨骼上，并评估与此方法相关的配准误差。使用快速立体摄影测量方法捕获面部的3D软组织表面，并使用3D计算机断层扫描（CT）扫描仪记录下层骨骼。使用Procrustes配准方法，三维CT扫描的外表面和照片般逼真的软组织表面被合并到一个单一的虚拟现实建模语言（VRML）文件，并使用标准的VRML查看器显示。使用从照片真实感皮肤表面到变换的CT皮肤表面的有符号最近点距离，在重建的人头部模型中计算配准误差的定量测量。对准表面的大部分之间的配准误差在+/- 1.5 mm内。眉毛、眼睑和脸颊周围的误差相对较大。同时记录面部和头骨可以减少这种误差。
The aim of this investigation Was to assess the feasibility of building a virtual human face digitally by superimposing a photo-realistic three-dimensional (3D) soft-tissue surface on bone in the correct relationship and evaluating the registration errors associated with this method. The 3D soft-tissue surface of the face was captured using a fast stereophotogrammetry method and the underlying bone was recorded using a 3D computed tomography (CT) scanner. Using the Procrustes registration method, the outer surface of the 3D CT scan and the photo-realistic soft-tissue surfaces were merged into a single Virtual Reality Modelling Language (VRML) file and displayed using a standard VRML viewer. Quantitative measurements of registration errors were calculated in the reconstructed human head models using the signed closest point distance from the photo-realistic skin surface to the transformed CT skin surface. The registration errors between most parts of the aligned surfaces were within +/- 1.5 mm. The errors were relatively large around the eyebrows, eyelids and cheeks. Simultaneous recording of the face and skull may reduce this error.