关键词: 图像复原, 大气散射模型, 大气耗散函数, 图像质量

Abstract: Solving defogging based on the atmospheric scattering model is an ill-posed problem. So a fast foggy image restoration algorithm based on high precision atmospheric veil is proposed in this paper. Firstly, atmospheric veil is introduced in the algorithm to simplify the atmospheric scattering model. Then a high precision method for solving the ambient light is put forward based on the thought of finding the sky part or the most hazed region of the image. Finally, the high precision atmospheric veil is got by calculating the PauTa criterion limit based on the idea of class morphology. After all the above, the fast restoration of foggy image is realized according to the simplified atmospheric scattering model. Experiments show that the proposed algorithm can exactly restore the color and clarity of the scene and improve the quality of the image. The complexity of the proposed algorithm is a linear function of the number of input image pixels and this allows a great promotion in the computing speed.

Key words: image restoration, atmospheric scattering model, atmospheric veil, image quality