Improved SAR image denoising algorithm of fusing Canny edge extraction technology
Hongdong Fan · Journal of Heilongjiang Institute of Technology · 2011
Enhanced Lee filtering method with 5×5 window can effectively suppress speckle noise,but the edge details and texture information loss seriously.Against the shortcoming of the enhanced Lee filter,according to the characteristic of the edge extraction,a new algorithm was proposed,which fuses the enhanced Lee filter and the edge extraction technology.In this algorithm,first the image was filtered using the enhanced Lee filter with 5×5 window.Then the edge and texture information of the image can be obtained through the Canny edge extraction technology.At last the pixel values of the edge and texture area of the filtered image are replaced by the result of the edge extraction.Experimental data quantitative shows that the improved filtering method can overcome the contradiction between the speckle suppressing and the edge preserving.