A denoising mixed noise method based on multistage median fliter and lifting wavelet technology

Inview of practical image including mixed noise with salt pepper and gaussian,an adaptive multistage median filter technology based on median filter was applied to denoising salt pepper noise.Firstly,multistage median filter was constructed to find the matrix of mixed noise,Then image with mixed noise was filted,At the same time,a lifting wavelet was constructed by lifting original wavelet.The adaptive threshold based on lifting wavelet transform for image denoising was applied to denoising gaussian noise.Through denoising vary of mixed noise,It is shown that the proposed method has the virtues of speeding the program,improving the signal-to-noise ratio,protecting edge information,denoising the mixed well and good effect.