19 February 2013 Fast DCT-based algorithm for signal and image accurate scaling
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Abstract
A new DCT-based algorithm for signal and image scaling by arbitrary factor is presented. The algorithm is virtually free of boundary effects and implements the discrete sinc-interpolation, which preserves the spectral content of the signal, and therefore is free from interpolation errors. Being implemented through the fast FFT-type DCT algorithm, the scaling algorithm has computational complexity of O(log[σN]) operations per output sample, where N and [σN] are number of signal input and output samples, correspondingly.
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Leonid Bilevich, Leonid Yaroslavsky, "Fast DCT-based algorithm for signal and image accurate scaling", Proc. SPIE 8655, Image Processing: Algorithms and Systems XI, 86550W (19 February 2013); doi: 10.1117/12.2008662; https://doi.org/10.1117/12.2008662
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