Two Stage Wavelet based Image Denoising
Glincy Abraham, Neethu Mohan, Sanjayan Pradeep Kumar Sreekala, Neethu Prasannan, K. P. Soman · International Journal of Computer Applications · 2012
In this paper we are proposing a 2-stage wavelet based denoising technique.First stage of denoising is performed on the approximation coefficient obtained from the level 1 wavelet decomposition [1] of the noisy image and second stage of denoising is applied on the reconstructed image.The second stage denoising has shown a better result on to the reconstructed image.The detail coefficients are newly estimated from the first level denoised approximation coefficients.For denoising, techniques like Total Variation [3], Split Bregman [4] and NL means [5] are used.The quality of results obtained from different denoising techniques has been measured using various objective matrices such as PSNR, MSE on standard test images.