PCA是最成功的线性鉴别方法之一，但传统的PCA方法提取的是图像的全局特征，受光照条件和人脸表情变化影响比较大。
But the traditional PCA is influenced by the light condition and the variety of facial expression because it extracts the global feature of the image.
AAM人脸特征点定位模块是关键模块，其定位结果直接影响人脸表情动画合成效果。
AAM facial feature points positioning module is the master key for its orientation result directly influence the synthetic effect of the facial expression animation.
同时，由于人脸检测受背景、光照、姿态、表情、遮挡、噪声等影响较大，也成为一个较为复杂的课题。
At the same time, since the human face detection can be greatly influenced by background, light, gesture, expression, occlusion, noise and so on, it also became a much complicated topic.
一天，我受队医罗伯特的影响，就像我是受在病人脸上痛苦表情影响一样。
That day, I was just as affected by the team doctor, Robert, as I was by the anguish on the patients' faces.
一天，我受队医罗伯特的影响，就像我是受在病人脸上痛苦表情影响一样。
That day, I was just as affected by the team doctor, Robert, as I was by the anguish on the patients' faces.
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