Defogging method for degraded image
Lihong Huang · Infrared and Laser Engineering · 2010
Atmospheric degraded images captured in fog weather were of poor contrast and low visibility as a result of atmosphere scattering.These images brought serious effects in the application of traffic system and outdoor visions system.Therefore,defogging for images of poor contrast which were captured in fog weather is of significance.Based on atmospheric physical degrading model,a novel defogging method was proposed according to the exponential relationship between the degradation and depths of the scene points.The single degraded image was needed only.And a new depth estimation method was used to estimate scene depth.Combined with adjustments on illumination,the three RGB components of original images were enhanced by illumination gain surface,which ensured the hue be constant and undistorted.Experimental results show that the new method can defog images effectively,and it possesses some characteristics such as simple operation,natural color and quick process.Furthermore,the defogging real-time videos can be realized.