Multi-resolution system for artifact removal and edge enhancement in computerized tomography images

The aim of image enhancement means adopting some technical method, which includes algorithm, to stand out the interested characteristics of the image and to restrain some useless characteristics of the image. The image, which has been improved, can satisfy some special analysis better than the original one. In this paper, we propose a new method for ring artifact removal and edge enhancement for industrial CT images based on the multi-resolution techniques such as, discrete wavelet transform (DWT), stationary wavelet transform (SWT) and dual tree complex wavelet transform (DT-CWT). The performance of the proposed method is compared and analyzed in detail and the promising results and findings are presented.