Single Image Dehazing in Inhomogeneous Atmosphere
WU Peng-fe · Dianzi xuebao · 2013
A new method for the restoration of degraded images in inhomogeneous atmosphere was proposed using the optical model of image degradation in inhomogeneous path. Firstly, Sky radiances at observer corresponding to the slant directions of each object in image were estimated. Then, based on the prior knowledge of dark channel, the rough relative distances of scene objects in image were estimated appro ximately, and as a key point, the ratio factor which reflects the inhomo geneous property of visual path in the degradation model was obtained, and subsequently atmospheric transmittance of imaging path was computed. Finally, using these parameters computed above, the degraded image can be restored by the inverse process of the optical degradation model.The experimental results show that the new algorithm is effective for actual outdoor degraded images.