Realizing Kaiming He's paper 'Single Image Haze Removal Using Dark Channel Prior'

• 雾霾天一定是白天,天色灰蒙蒙的。因此在计算大气光时,我假设最亮部分是灰白色,那RGB应该都很接近255,so没必要分开算R/G/B,具体见代码
• When I calculate the A(atmosphere), I simply suppose the brightest spot is approximately white(gray). So the RGB value of that point should be almost same
• 使用导向滤波精确透光率
• Using the guided filter now.