Literature Review on Image Enhancement Technique in Medical Image Processing

Abstract

Image Enhancement is a process to improve the quality of an image for further processing required for a specific purpose. Improving the quality of an X-ray image and the image taken of Mars has a different approach. One of the major problems in medical image is their poor contrast quality and noise. Some of the common forms of medical images that are generally dealt with are TRUS (Trans-rectal Ultrasound), MRI (Magnetic Resonance Imaging) and X-Rays. Other than the usual image enhancement technique, this paper deals with the analysis of anisotropic diffusion and topological derivative as the major tools of medical image enhancement techniques. Anisotropic diffusion is broadly based on selective smoothness or enhancement of local features such as region boundaries. If the image under analysis is subjected to any hole or crack, topological derivative helps us to quantify the sensitivity of the problem.