摘要
目的:探讨基于纹理映射的方法构建颅颌面三维形貌模型,最大限度包含颌面部解剖形态、纹理、色泽及质地信息,并能于虚拟环境下显示。方法:通过VisualC++6.0语言编程,基于共轭梯度算法的曲面参数化方法,开发编写贴图软件。利用面部软组织解剖标志点,将颅面部CT扫描重建三维模型与面部正侧位摄影照片间建立纹理映射,构建颅颌面三维形貌模型,行面部形态分析及虚拟环境下显示。结果:构建的颅颌面三维形貌模型既包含软硬组织的解剖结构形态,又包含面部色泽、纹理、质地等信息,形态逼真,实现了虚拟环境下显示,并可以任意视角观察分析。结论:纹理映射法构建颅颌面三维形貌模型,为颅面部的测量、诊断分析、术后预测提供了一种较为理想、简单、经济有效的建模方法,具有较高的研究及临床应用价值。
PURPOSE： To explore the feasibility of building craniomaxillofacial three-dimensional （3-D） photo-realistic model by texture mapping and to realize 3 -D morphometry and virtual display. METHODS： Based on surface parameterization method of the conjugate gradient algorithm, the texture mapping software was developed to construct craniomaxillofacial 3-D photo-realistic model. 3-D model including both soft and hard tissues were reconstructed from sequential CT slices. Texture mapping was established with anatomic landmarks of the facial soft tissue between color portraits and 3-D model. Three digitized color portraits were blended and texture-mapped onto the 3-D head model. Facial morphometry and 3-D measurement were performed and virtual human face was displayed in virtual reality environment. RESULTS： Texture mapping was established by an ideal relation between the portraits and 3-D model. Craniomaxillofacial 3-D morphology model including the information of soft and hard tissue anatomy, color and texture was built. Photo-realistic craniomaxillofacial model could be viewed from an arbitrary angle and 3-D morphometry was performed. CONCLUSION： Texture mapping was regarded as an ideal valuable alternative in building a photo-realistic virtual human face for craniomaxillofacial morphometry, diagnosis, treatment planning and postoperative prediction.
出处
《中国口腔颌面外科杂志》
CAS
2009年第5期441-445,共5页
China Journal of Oral and Maxillofacial Surgery
基金
国家自然科学基金(30872906)
上海市科学技术委员会重点项目(074119511)
上海市科学技术委员会资助项目(08DZ2271100)
上海交通大学医工(理)交叉研究基金(YG2007ZD09)~~
关键词
纹理映射
贴图法
颅颌面
形貌模型
构建
虚拟现实
Texture mapping
Portrait superimposition
Craniomaxillofacial region
Photo-realistic model
Construction
Virtual reality
