In this study,an improved random access (RA) scheme for Machine-to-Machine (M2M) communications is proposed.The improved RA scheme is realized by two steps.Firs
目的为解决疲劳驾驶检测中人眼状态识别的难点,提出一种基于眼白分割的疲劳检测方法。方法首先对获取图像进行人脸检测,利用眼白在Cb-Cr上良好的聚类性,基于YCb Cr颜色空间建立高斯眼白分割模型;然后在人脸区域图像内做眼白分割,计算眼白面积;最后将眼白面积作为人眼开度指标,结合PERCLOS(percentage of eyelid closure over the pupil over time)