Method to convert image resolution using M-band-extended QMF banks

Abstract
A new method to convert image resolution using M-band extended QMF is proposed. Due to the parallel structure ofthe filter banks, the conversion ratio of the proposed method is not constrained to be a power of 2. Moreover, since theproposed method performs the filtering of signals by convolution operations, the resolution converted image by theproposed scheme is free from the aliasing which occurs in that by the DCT method. Judging from the experimentalresults, it is concluded that the resolution converted image by the proposed scheme is superior to that by the DCTmethod.

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