@inproceedings{87d0aacc39de45a89ccfca630f4d46ea,
title = "DFT and DCT based discrete sinc-interpolation methods for direct Fourier tomographic reconstruction",
abstract = "The paper describes the implementation and use of recently developed DFT and DCT based discrete sinc-interpolation algorithms for the direct Fourier method of reconstructing images from projections. DFT based discrete sinc-interpolation is the only completely reversible discrete interpolation technique. DCT based discrete sinc-interpolation algorithm implements the same interpolation kernel that of the DFT based method and allows to avoid its boundary affect artifacts. It is also computationally more efficient. Two modifications of the DCT based interpolation for tomographic reconstruction are suggested: interpolation by global zooming of 1-D DFT spectra of projections and interpolation with variable zooming factor along the angle coordinate. The latter allows to substantially reduce the computational complexity without compromising interpolation accuracy. Results of comparative numerical simulation of suggested algorithms show a good image reconstruction quality with a reduced level of artifacts.",
keywords = "Computational complexity, Discrete Fourier transforms, Discrete cosine transforms, Image converters, Image reconstruction, Interpolation, Kernel, Numerical simulation, Reconstruction algorithms, Tomography",
author = "Yaroslavsky, {L. P.} and Y. Chernobrodov",
note = "Publisher Copyright: {\textcopyright} 2003 IEEE.; 3rd International Symposium on Image and Signal Processing and Analysis, ISPA 2003 ; Conference date: 18-09-2003 Through 20-09-2003",
year = "2003",
doi = "10.1109/ISPA.2003.1296931",
language = "אנגלית",
series = "International Symposium on Image and Signal Processing and Analysis, ISPA",
publisher = "IEEE Computer Society",
pages = "405--410",
editor = "A. Neri and H. Babic and S. Loncaric",
booktitle = "ISPA 2003 - Proceedings of the 3rd International Symposium on Image and Signal Processing and Analysis",
address = "ארצות הברית",
}