Abstract: In todays world visual information is becoming more important aspect.Human also relies very much on visual information.The visual information is represented by using digital images or videos.Digitalis images mostly suffer from poor image quality, particularly lack of contrast and presence of shading and artifacts due to the deficiencies in focusing lighting, specimen staining and other factors also.Because some features of images are hardly detected by eye in an image,images can be transformed before display.Image enhancement is a digital process-ing method which does its best to improve image vision and make the image adaptable to be processed by computer.