DocumentCode
19928
Title
Revisit of the Ramp Filter
Author
Zeng, G.L.
Author_Institution
Dept. of Electr. Eng., Weber State Univ., Ogden, UT, USA
Volume
62
Issue
1
fYear
2015
fDate
Feb. 2015
Firstpage
131
Lastpage
136
Abstract
An important part of the filtered backprojection (FBP) algorithm is the ramp filter. This paper derives the discrete version of the ramp filter in the Fourier domain and studies the windowing effects. When a window function is used to control the noise, the image amplitude will be affected and reduced. A simple remedy is proposed to improve the image accuracy when a window function must be used.
Keywords
Fourier analysis; image denoising; image filtering; image reconstruction; Fourier domain; filtered backprojection algorithm; image accuracy; noise control; ramp filter; window function; windowing effects; Arrays; Convolution; Discrete Fourier transforms; Image reconstruction; Kernel; Noise; Transfer functions; Analytic image reconstruction; filtered backprojection algorithm;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/TNS.2014.2363776
Filename
6940329
Link To Document