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Figure 3
Description of the operator PG (first line). A grid of points is created; one coefficient is assigned to each point on the grid. The result is convolved by a two-dimensional Gaussian function (depicted as green circles), and projected to obtain a sinogram. An equivalent approach (second line) consists of first projecting the `point coefficients' with an appropriate projector, and convolving each line of the sinogram by a one-dimensional Gaussian function.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 24| Part 1| January 2017| Pages 257-268
https://doi.org/10.1107/S1600577516016556
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