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Image enhancement is the key processing on an image for wide range of the applications. Contrast enhancements improve the perceptibility of a image by changing the pixels intensity of an input image. In this study, a novel method for the image contrast enhancement is to proposed based on Discrete Shearlet Transform (DST) for the color images. In order to obtain high contrast enhancement image, the RGB image is to converted into HSV (Hue, Saturation and Value) color space. The converted hue color channel is only taken in to the account for the DST decomposition. After that higher sub bands of the hue component are eradicated and lower sub bands are the only considered for the reconstruction. Finally, the high contrast image is obtained by using an reconstructed Hue for HSV colour space and convert this colour space into the RGB color space. The performance of proposed contrast image enhancement method is compared with the existing histogram equalization based on the image enhancement. The visualization based results shows that the proposed contrast image enhancement system is achieve satisfactory performance.

A Novel method for Enhancement of Coloured Image Using DST Algorithm