%0 Conference Proceedings
%T A hybrid estimation theoretic-POCS method for tomographic image reconstruction
%D 2005
%A Salina, Fernando Vernal,
%A Mascarenhas, Nelson Delfino d'Ávila,
%@affiliation USP – Universidade de São Paulo
%@affiliation UFSCar – Universidade Federal de São Carlos
%E Rodrigues, Maria Andréia Formico,
%E Frery, Alejandro César,
%B Brazilian Symposium on Computer Graphics and Image Processing, 18 (SIBGRAPI)
%C Natal
%8 9-12 Oct. 2005
%I IEEE Computer Society
%J Los Alamitos
%S Proceedings
%K POCS, tomographic, reconstruction, projection, convex sets.
%X We present in this work a new method for the tomographic reconstruction with Poisson noise corrupted projections. The reconstruction method is a hybrid estimation theoretic-POCS (Projection Onto Convex Sets) method performed by first estimating the noisy projections using Anscombe Transformation, Discrete Wavelet Transform and pointwise Wiener filter and subsequently reconstructing the images through a parallel POCS method. The use of a previous filtering of the projections imposes a tighter restriction on the observation of the POCS method, allowing a better reconstruction, with a very little increase in computational cost.
%@language en
%3 salinaf_tomographic.pdf