A New Method for Improving Contrast Enhancement in Remote Sensing Images by Image Fusion

Linear contrast enhancement, conjointly referred to as a contrast stretching, linearly expands the original digital values of the remotely detected data into a new distribution. By increasing the original input values of the image, the entire range of sensitivity of the display device is used. Linear contrast enhancement conjointly makes refined variations among the information more obvious. These kinds of enhancements are best applied to remotely sensed images with Gaussian or near-Gaussian histograms, meaning, all the brightness values fall among a narrow range of the histogram and only one mode is apparent. Image enhancement is the indispensable features in image processing to extend the contrast of the remote sensing data and to provide better transform representation of the remote image data. This paper presents a new methodology to enhance the contrast and intensity of the image data using image fusion with Gaussian and Laplacian pyramid. Keywords—contrast enhancement, image fusion, pyramidal image composition and decomposition, Gaussian pyramid composition and decomposition.