Enhancement algorithm of fog-degraded images based on bilinear interpolation dynamic histogram equalization
Xiaoming Liu · Journal of Dalian Maritime University · 2010
To resolve the fog-degraded image problem,fog removal method based on bilinear interpolation dynamic histogram equalization(BIDHE) was proposed.The original image was split into some sub-images with same size,and the histogram of each sub-image was partitioned by the local minima.The gray level range in output image could be calculated according to the equations,and then HE was applied to each sub-histogram,and the defogged image was achieved by the bilinear interpolation.A real fog degraded image was selected for experiment.The edge detection and other three evaluation indexes including MSE、SNR and PSNR were used to compare different algorithms.Results show that the contrast of the fogdegraded image is enhanced effectively and the detail is restored clearly.