DocumentCode
967708
Title
Time-frequency distribution inversion of the Radon transform [image reconstruction]
Author
Sahiner, Berkman ; Yagle, Andrew E.
Author_Institution
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Volume
2
Issue
4
fYear
1993
fDate
10/1/1993 12:00:00 AM
Firstpage
539
Lastpage
543
Abstract
In using filtered backprojection to compute the inverse Radon transform, the ramp filter amplifies noise. Spatially invariant noise filters reduce resolution. It is desirable to filter noise where projections have no local high-frequency components. Using the short-time Fourier transform, the authors apply a time-frequency mask filter that zeroes out projections where local signal energy is below a threshold. Results show improvement over reconstructions using spatially invariant smoothing filters
Keywords
filtering and prediction theory; image reconstruction; time-frequency analysis; transforms; Radon transform; filtered backprojection; image reconstruction; short-time Fourier transform; time-frequency distribution inversion; time-frequency mask filter; Energy resolution; Filtering; Fourier transforms; Image reconstruction; Low pass filters; Noise reduction; Shape; Signal to noise ratio; Spatial resolution; Time frequency analysis;
fLanguage
English
Journal_Title
Image Processing, IEEE Transactions on
Publisher
ieee
ISSN
1057-7149
Type
jour
DOI
10.1109/83.242364
Filename
242364
Link To Document