A 3-d face model is constructed by the imaging theory and spherical harmonics, combining with the principle of 3-d projection and PCA.
根据3 - D数据的优势，利用图像成像原理和球面调和函数理论，结合3 - D投影原理和PC A技术建立了一个3 - D人脸模型。
The two components have identical vertical structure and physical process. The global spectral model component uses spherical harmonics as horizontal basis functions.
这两部分采用相同的垂直结构和物理过程，都用球谐函数作为水平基本函数。
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