A Modified SVD-DCT Method for Enhancement of Low Contrast Satellite Images
G. Praveena, M. Venkatasrinu · 2012
During the last decade, several techniques are proposed for contrast enhancement of a low-contrast satellite images. In this a new technique has been proposed based on the Singular Value Decomposition (SVD) and Discrete Cosine Transform (DCT). The proposed technique modified SVD-DCT converts the image into the SVD-DCT domain after normalizing the singular value matrix. Then the modified image is reconstructed by using inverse DCT. In the enhancement procedure Adaptive Histogram Equalization (AHE) has been used.. The perceptual and quantitative results of the proposed modified SVD-DCT method clearly indicates increased efficiency and flexibility over the exiting methods such as Linear Contrast Stretching