International Journal of Computer Applications |
Foundation of Computer Science (FCS), NY, USA |
Volume 54 - Number 12 |
Year of Publication: 2012 |
Authors: S. Sulochana, R. Vidhya |
10.5120/8616-2478 |
S. Sulochana, R. Vidhya . Image Contrast Enhancement using Atrous Wavelet Transforn and Singular Value Decomposition(SVD). International Journal of Computer Applications. 54, 12 ( September 2012), 9-14. DOI=10.5120/8616-2478
In this paper, a new satellite image contrast enhancement technique based on s Atrous wavelet transform and singular value decomposition (SVD) has been proposed. To obtain shift invariant discrete wavelet transform decomposition for images, we introduced the discrete wavelet transform known a "A trous" algorithm to decompose the image into wavelet planes which is computed as the difference between two consecutive approximations and calculate the singular value matrix of the residual image. The enhanced image is obtained by applying inverse transforms. These techniques are compared with conventional image equalization techniques such as general histogram equalization and discrete wavelet transform. Quality metrics were used to evaluate the superiority of the proposed method.