对于雾霾天气下采集的图片，求解其暗通道数值，显示暗通道图像，为后期图像清晰化做准备(For the images collected in haze weather, we can solve the dark channel values, display dark channel images, and prepare for later image sharpening.)

对沙尘天气下获得图像进行直方图均衡化，为后期基于retinex算法处理沙尘天气下的图像打下基础(Histogram equalization is used to obtain images in sand and dust weather, which lays a foundation for later Retinex based image processing in sand and dust weather.)

用直方图均衡化方法对雾霾天气的车牌图像进行增强，经过预处理后定位车牌位置，分割车牌字符(Histogram equalization method is used to enhance the license plate image in haze weather. After pre-processing, the license plate position is located and the license plate character is segmented.)