1. INTRODUCTION
Image processing is an important component of modern technologies because human depends so much on the visual information. About 99% information we perceive about the world is obtained with our eyes. In other words, images are better than any other information form for us to perceive. The image captured from natural environment with high dynamic range includes both dark and light regions. Due to exceed in dynamic range of human eyes sensing, those image are difficult to perceive by human eyes. And important details may be hiding in that low contrast image. In such cases image enhancement helps to improve the quality and reveals the hidden data/object.