Image Resolution Enhancement Using DWT And Interpolation Techniques
Publication Date : 30/01/2018
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Resolution plays an important role in today’s world. CCTV footages are used for various investigation purposes by the authorities and government. Resolution of the footages is one of the major issue. This paper proposes one of the resolution enhancement technique which bases the interpolation of the high frequency subbands which are obtained by applying DWT to the low resolution image. The first step goes like the low resolution image is decomposed into Subbands using the DWT technique. Secondly the high Frequency subbands and the low resolution images are interpolated. Finally combining the resultant images applied by the inverse DWT gives us a new resolution enhanced image. An intermediate stage of estimation is introduced for improving the sharpness of the image. The proposed technique have been tested on a few benchmark images. The experimental results show the superiority of the proposed technique over the conventional technique by comparing the PSNR and RMSE values.
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