In processing of face location, difference image method and optical flow analysis is used to detect the movement area.
在脸部的提取中,本文采用差分法和光流场分析相结合的方法检测图像的运动信息,然后结合自动方差门限法及其他方法提取运动量较大的图像区域作为脸部区域。
参考来源 - 汽车司机驾驶疲劳报警器的研究及设计·2,447,543篇论文数据，部分数据来源于NoteExpress
This system detected motion target using difference image method through threshold image segmentation, then automatically tracked target by using centroid tracking algorithm.
该系统运用差分图像法，通过阈值图像分割来检测运动目标，并采用形心跟踪算法来自动跟踪目标。
Identification algorithm mix difference image method and 4-connected boundary tracking method, besides, we improved the difference image method and built a new moving detection model finally.
识别算法采用差影法与4邻域连通区域标记相结合，并对差影法进行改进，建立起一个新型的运动检测模型。
The second algorithm is proposed because the method of difference image is not effective when the different information coming from two frames of difference image is too much or too little.
算法二是针对两帧差分图像之间所提供的差异信息过多或过少这两种极端情况，用差影法粗分割对人脸图像进行预处理时失效而提出来的。
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