关键词: 透射率, 暗原色先验, 雾天成像模型, 能量泛函

Abstract: The methods based on dark channel prior have two disadvantages: the first is that the recovered image fails to achieve good effects in correspondence of?object?edges?in?image; the second is that images fail to contain a larger area of the sky. In order to solve the problem, a novel method is proposed. Firstly, based on haze imaging model and image restoration theory, a data term is proposed. Secondly, a constraint term is proposed based on edge feature of transmission and image, and then the function is proposed which is based on the linear combination of data term and constraint term. Finally, accurate restoration image is obtained, through stepwise gradient descent method to optimize the function. Experimental results clearly indicate that the proposed method performance is better in comparison with traditional methods.

Key words: transmission, dark channel prior, haze imaging model, energy function