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Image Resolution Enhancement Technique Based on the Interpolation of the High Frequency Subbands Obtained by DWT

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Author(s): Mrs.S.Sangeetha#1 , Mr.Y. Hari Krishna

Journal: International Journal of Engineering Trends and Technology
ISSN 2231-5381

Volume: 4;
Issue: 7;
Start page: 3061;
Date: 2013;
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Keywords: DWT | SWT | PSNR | IDWT | WZP | Interpolation.

ABSTRACT
In this correspondence, the authors propose an image resolution enhancement technique based on interpolation of the high frequency sub band images obtained by discrete wavelet transform (DWT) and the input image. The edges are enhanced by introducing an intermediate stage by using stationary wavelet transform (SWT). DWT is applied in order to decompose an input image into different sub bands. Then the high frequency sub bands as well as the input image are interpolated. The estimated high frequency sub bands are being modified by using high frequency sub band obtained through SWT. Then all these sub bands are combined to generate a new high resolution image by using inverse DWT (IDWT). The quantitative and visual results are showing the superiority of the proposed technique over the conventional and state-of-art image resolution enhancement techniques.The main aim of this image resolution enhancement is to produce a high resolution image with high PSNR from a low resolution image. If we adopt this method of resolution enhancement this helps in viewing even a low resolution image with high clarity i.e in case of seeing satellite images.

Tango Jona
Tangokurs Rapperswil-Jona

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