... reconstruction algorithm, for performing that task. In thenumerical observer approach [11, 16, 17], a task-specific FOM is computed for each image. Basedon the FOMs for all the images produced ... types of iterative methods for estimating the xjsurprisinglyefficient. This is because one can make use of a subroutine which, for any i, returns a list of thosejs for which ri,jis not zero, ... three FFTs, see [7].5. Inverse transforming in the first variable — The inverse Fourier transform of G can nowbe estimated at the required points by taking, for every fixed j, the inverse DFT in...