Single Image Dehazing with the Influence of Intense Light Source
BI Xue-yin · 2015
In view of the inhomogeneous condition influenced by the intense light source,a novel single image dehazing approach is proposed for images containing intensively emitted light source.This approach builds upon an image degradation model introduced via physically analyzing the illuminating effects of intense light source.In this paper,based on the experimental and observational discovery,the atmospheric light is divided into global constant component and intense light component.Firstly,the location and fitting range of light source is obtained.Then,the 2-D Gaussian fitting function of intense light component is calculated by using least square method,and the global constant component can be estimated after removing the strong light influence part in the input image.Thereafter,the atmospheric transmittance is estimated according to the dark channel prior knowledge on the light source removed image.Finally,the hazy image can be restored by the inverse process of the degradation model.The experimental results show that the new algorithm is effective for actual outdoor degraded images.