Improved image denoising algorithm in digital diffusion-reaction filter

A new digital nonlinear diffusion-reaction filter model is proposed based on Nordstrm energy functional for image denoising.Numerical results show that the model is not only effective in denoising images with Gaussian noise,salt and pepper or Speckle noise,but also suitable for images with mixed noise.The denoised image with good visual effect has higher peak signal noise ratio.