Removal The Backscatter Noise Of Foggy Weather Image

The fog in the air causes people’s sight blurred, largely reduced the scenevisibility, and make a serious effect on people’s production and life. The impact of fogon the transport system is more serious．Heavy fog is often a hidden danger of trafficaccident, in which fights are cancelled, highways are closed, and ships are anchored.This causes traffic system completely paralysis and huge economic loss. Thus therestoration processing of atomization image has important practical significance.Fog is a kind of weather phenomenon when the moisture in the air is more thanthe saturated vapor volume of a certain temperature, the excess moisture can formwater droplet or ice crystal suspending in the near surface. When enough watermolecules and small dust particles in the air combined and the bond between watermolecules, water droplet having a larger radius or ice crystal will be formed. Thewater droplet having a larger radius suspending in the air has an obvious effect onvisible light scattering. Especially, with the increase of distance, the scattering effectwill grow exponentially, which reduces the visibility in fog, so scenery is submergedin the gray fog and difficult to distinguish. Because of the characteristics of theatomization imaging system, the effect on imaging system is mainly the incident lightabsorption and scattering function from fog, in which, absorption effect will cause theenergy of incident light exponentially decays, and in the imaging system,the effect ofscattering on the imaging results is significant. The background light in the imagingsystem includes backward scattering light and forward scattering light,and thebackward scattering light has effect on the imageing system.This paper mainly studies the imaging mechanism and atmospheric disturbance infoggy weather. Aiming at the reasons of degeneration, several commonly methods forimage restoration are studied. A physical model of images restoration in foggy weather is put forward. The transfer function of the system and the characteristics ofthe backscattering noise is studied and analyzed. The corresponding formula isderived. Wiener filtering method is used in image restoration to obtained the restoredimage. Through the experiment, this method has feasibility.