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Discrete Wavelet Transform-Based Satellite Image Resolution Enhancement

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2 Author(s)
Demirel, Hasan ; Dept. of Electr. & Electron. Eng., Eastern Mediterranean Univ., Mersin, Turkey ; Anbarjafari, G.

Satellite images are being used in many fields of research. One of the major issues of these types of images is their resolution. In this paper, we propose a new satellite image resolution enhancement technique based on the interpolation of the high-frequency subbands obtained by discrete wavelet transform (DWT) and the input image. The proposed resolution enhancement technique uses DWT to decompose the input image into different subbands. Then, the high-frequency subband images and the input low-resolution image have been interpolated, followed by combining all these images to generate a new resolution-enhanced image by using inverse DWT. In order to achieve a sharper image, an intermediate stage for estimating the high-frequency subbands has been proposed. The proposed technique has been tested on satellite benchmark images. The quantitative (peak signal-to-noise ratio and root mean square error) and visual results show the superiority of the proposed technique over the conventional and state-of-art image resolution enhancement techniques.

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Geoscience and Remote Sensing, IEEE Transactions on  (Volume:49 ,  Issue: 6 )