Image zooming and enhancing based on coupled wavelet shrinkage
Xiangchu Feng · Systems engineering and electronics · 2008
A new image zooming and enhancing method is proposed using the equivalence between single-level shift invariant Haar wavelet transform and the discrete one iteration of diffusion equations.The original image is regarded as the low frequency of the wavelet analysis of the zoomed one,and then the shift invariant wavelet analysis is applied with the forward-backward diffusion-based coupled wavelet shrinkages.The image is zoomed and denoised as well as edge enhancement with this type of shrinkage.The proposed method is easy to implement and some numerical experiments illustrate that it is a valid new image zooming and enhancing algorithm.