Abstract:In order to improve the shortcomings of the currentfog algorithm

the histogram equalization algorithm and the homomorphicfiltering algorithm are combined to enhance the fog image.First

the improved homomorphic filtering algorithm is used to correct the brightnessof the illumination uneven image

and the nonlinear problem is linearized bythe logarithmic operation. At the same time

the low frequency and highfrequency components are separated

the high frequency filter is used tosuppress the low frequency information

and then the histogram equalizationalgorithm is used to nonlinearly stretch the low frequency components of the image

and the pixel values of the image are redistributed to enhance the fog Image.Simulationused by Matlab

the comparison of visual effects and run time and informationentropy shows that the improved algorithm is better than the result of the twoalgorithms alone.