Binary steering in discrete tomography reconstruction with sequential and simultaneous iterative algorithms

AbstractThe binary steering process is a heuristic designed to intervene between consecutive steps of a nonbinary iterative image reconstruction algorithm in order to gradually steer the iterates towards a binary solution. We present computational results which show that a strongly overrelaxed simultaneous nonbinary iterative algorithm performs in our experiments better than a strongly underrelaxed sequential iterative algorithm. We also notice that faster binary steering gives better binary reconstructed images when the sequential iterative nonbinary algorithm is used