Title :
An improved 2D interpolation scheme using FFT
Author :
Wang, Zhiwei ; Soltis, J.J. ; Miller, W.C.
Author_Institution :
Dept. of Electr. Eng., Windsor Univ., Ont., Canada
Abstract :
In many in digital signal processing systems, it is required to change the sampling rate of a digital signal. The interpolation of an image provides an approach to first sample an image at a low rate for transmission or storage, and then increase the sampling rate later. In this paper, a pre-transform is introduced into the 2D interpolation scheme through a DFT. This pre-transform takes advantage of the periodicity of the DFT. Example images show this technique to be superior to the window technique, and the improvement is remarkable
Keywords :
fast Fourier transforms; image processing; interpolation; 2D interpolation scheme; FFT; digital signal processing systems; discrete Fourier transform; fast Fourier transform; image interpolation; image storage; image transmission; periodicity; pre-transform; sampling rate; window technique; Digital signal processing; Discrete Fourier transforms; Fast Fourier transforms; Image sampling; Image storage; Interpolation; Signal processing; Signal processing algorithms; Signal sampling; Two dimensional displays;
Conference_Titel :
Electrical and Computer Engineering, 1993. Canadian Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-2416-1
DOI :
10.1109/CCECE.1993.332208
