The related problems of minimizing the functionals F(x)=αKL(y,Px)+(1-α)KL(p ,x) and G(x)=αKL(Px,y)+(1-α)KL(x ,p), respectively, over the set of vectors x⩾0 are considered. KL(a, b) is the cross-entropy (or Kullback-Leibler) distance between two nonnegative vectors a and b. Iterative algorithms for minimizing both functionals using the method of alternating projections are derived. A simultaneous version of the multiplicative algebraic reconstruction technique (MART) algorithm, called SMART, is introduced, and its convergence is proved
Published in:
Image Processing, IEEE Transactions on
(Volume:2
,
Issue:
1
)
Date of Publication:
Jan 1993
- Page(s):
-
96
-
103
- ISSN :
-
1057-7149
- INSPEC Accession Number:
-
4431083
- Digital Object Identifier :
-
10.1109/83.210869
- Product Type:
-
Journals & Magazines
- Date of Current Version :
-
06 August 2002
- Issue Date :
-
Jan 1993
- Sponsored by :
-
IEEE Signal Processing Society