ABSTRACT
ABSTRACT: A new medical image enhancement method based on ridgelet transform was proposed in this paper. Medical images enhancement is important in the clinical medicine. And the key work of enhancement methods based on ridgelet transform is how to enhance coefficients of ridgelet transform. The multiwavelet transform is used after the Radon transform in the process of ridgelet transform, and these multiwavelet coefficients are enhanced with weight factors. In order to reduce the effects of noise, the soft threshold method was selected to de-noise the coefficients of ridgelet transform. The piece wise histogram transform was used to stretch the range of gray level of the enhanced image for getting abundant gray levels. Experiments have shown that the method can not only enhance an image’s details, but also hold the image’s edge features effectively.
