A fast single image defogging method is proposed to improve the quality of the haze image. The dark channel prior is redefined by median filter to suppress halo effect. Average filter is used for the secondary filtering to improve the estimate precision of the transmittance and the brightness of the image. This method is simple, less time consumption. The experimental results show that this algorithm can effectively improve the contrast and clarity of scene, and can recover high quality sky haze-free image.
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