本代码是瞳孔检测，利用高斯平滑减小噪声，直方图均衡化增强对比度，二值化突出眼睛的特征，Hough变换画圆找瞳孔。本代码是利用QT做的界面，经过试验，效果良好。可直接使用。(This is pupil track.We employ Gaussian Smoothing to decrease noise, and equlazation histogram to enhance contrast, and binaryzation to prominent eyes' feature, and