Medical image enhancement by applying averaging method in clusters

In this paper a new technique to enhance the medical images without distorting the local information is proposed. Proposed method is capable of reducing the over-enhancement problem. The method first cluster the gray levels based on certain criteria and then the new transformation function is applied to each cluster. Proposed method uses Averaging method to transform the gray levels in each cluster. PSNR values show that proposed method performs better than other spatial and transform based image enhancement techniques. Experimental results show that proposed method produces noise free contrast enhanced images.