Fast DCT-based algorithm for signal and image accurate scaling

Leonid Bilevich; Leonid Yaroslavsky

doi:10.1117/12.2008662

19 February 2013 Fast DCT-based algorithm for signal and image accurate scaling

Leonid Bilevich, Leonid Yaroslavsky

Proceedings Volume 8655, Image Processing: Algorithms and Systems XI; 86550W (2013) https://doi.org/10.1117/12.2008662
Event: IS&T/SPIE Electronic Imaging, 2013, Burlingame, California, United States

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.

Citation Download Citation

Leonid Bilevich and 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); https://doi.org/10.1117/12.2008662

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