Haze is an important influence factor of visible light RS data's obtaining and using. Based on dark channel prior and haze image model, this paper studies the dehaze technology from a single satellite RS image. Aim at the characteristic of uneven cloud in satellite RS image and the problem of the unreasonable estimate for airlight in dehaze method, this paper designed a new method for airlight computing, which did not reduce the image definition in clear area. This method joined the information of cloud density, and the result have no over processing and ill-processing problem. At last, using medium-resolution image and high-resolution image to make system experiment, the result is effective.
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