Tom Asaki, Erik Bollt, and Kevin Vixie (2006)
Sparse Radiographic Tomography and System Identification from Single View, Multiple Time Sample Density Plots
Computational Methods in Applied Mathematics 6(4):354-366.
Tomography is a classic inverse problem in which multiple density
pro jections of an ob ject are processed to infer some approximation of the original. We
consider the highly sparse inverse problem of single angle pro jection, but seek to reduce
the ambiguity through multiple time observations in a dynamic system of known or
partially known dynamics. In this work we solve the planar problem by optimization
techniques based on a gradient-free multi-directional search algorithm to minimize our
nonlinear functional. We demonstrate convincingly successful numerical examples to
support our relatively simple technique.