The vertical direction of face is determined by the PCA at the random pose. Based on surface registration, the symmetrical surface and symmetrical profile are extracted.
在人脸任意位置下，利用PCA自动确定人脸纵方向，采用网格配准方法提取对称面和对称轮廓线；
It also looks symmetrical in profile.
在横剖面上它看起来也是对称的。
The obtained profile of spectral line has a typical and symmetrical shape of line. The line width (FWHM) was measured to be 3. 2 GHz.
获得的光谱谱线轮廓具有典型的对称性线型，测得的谱线半宽度为3.2千兆赫。
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