成像光线追踪的舌面彩色三维成像方法研究

在中医舌诊的客观化研究中,舌面的彩色三维数据能为医生提供更全面的信息,提高诊断的准确性。提出了一种基于成像光线追踪的舌面彩色三维成像方法。在成像光线追踪模型的基础上,引入光平面约束,以准确确定成像点到空间测量点的映射,结合2个线结构光传感器的扫描测量,分别获取舌头上表面及下表面完整的三维信息,并根据空间测量点到成像点的映射,完成颜色渲染,获取对应测量空间点的颜色信息。设计并研制了舌面彩色三维成像系统,进行了测量及精度验证实验,实验结果表明该方法可以准确获取舌面的彩色三维信息。

Research on color 3D imaging method for tongue surface based on imaging ray tracking

In the objective research of tongue diagnosis in traditional Chinese medicine, the color 3D information of tongue surface can provide more comprehensive information for the doctor, which improves the accuracy of diagnosis. A color 3D imaging method of tongue surface based on imaging ray tracking is proposed. Based on imaging ray tracking model, the mapping relationship from the image point coordinates to the 3D measurement point coordinates is accurately established through introducing the light plane constraint. Two line structured light sensors are used to conduct scanning measurement, the complete 3D information of the up and down surfaces of tongue is respectively obtained. According to the mapping relationship from the 3D measurement point coordinates to the image point coordinates, the corresponding color information of the 3D measurement points is achieved with color rendering. The 3D imaging system of tongue surface was designed and developed, both measurement and accuracy verification experiments were implemented. Experiment results show that the proposed method can accurately obtain the color 3D information of tongue surface.