Submitted on: 31 January 2013.
Revised on: 11 March 2013.
Accepted on: 17 March 2013.
SIAM Journal on Imaging Sciences
Submitted on: 27 May 2005.
Revised on: 08 July 2005.
Accepted on: 20 July 2005.
SIAM Journal on Imaging Sciences
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Submitted on: 08 March 2018.
Revised on: 17 April 2018.
Accepted on: 26 April 2018.
SIAM Journal on Imaging Sciences
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