Images are the main source of acquiring information from the real world. Images are captured or taken in different situations and position. So there is need for image preprocessing of the captured image for the purpose of removal of noise, unwanted background, making sharp or blur according to application. Image enhancement is the first preprocessing step in image processing, with the help of which the authors propose the image with more clarity. In this paper the authors describes various techniques of image enhancement and compare it with image fusion techniques, with the help of various error analysis techniques. Image fusion techniques are assessed using the various metrics. A comparative study is carried out on different categories of images.
General TermsDigital image processing, Image enhancement
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