Investigation of various Speckle Noise Denoising Filters

In this paper, various ultra sound image denoising techniques are investigated and results are compared for various conditions. Synthetic Aperture radar images and ultra sound images are often corrupted by speckle noise. It is also known as granular noise. There are many methods for removal of speckle noise. The filters are developed for the removal of speckle noise. This paper reviews filters mostly used to remove speckle noise. Frequency analysis methods, various adaptive methods, temporal analysis methods are defined for the removal of speckle noises.