Two key techniques accounts the most for a human-face recognition system: one is face detection and orientation; the other is feature abstraction and recognition from unified human-face image.

人脸识别系统主要包括两个技术环节：首先是人脸检测和定位，然后是对归一化的人脸图像进行特征提取与识别。

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So the integrated method of differential frames arithmetic and complexion detection can make an instant and exact orientation of the driver's face.

对于司机面部器官的检测，首先要确定司机的脸部，我们采用帧间差分法和肤色检测相结合的方法。

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This paper studies the human face detection by support vector classifier using histograms of color, color edge and its orientation.

研究了利用颜色直方图、颜色边缘幅值和边缘方向直方图特征，基于支撑向量分类器的检测人脸技术。

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