Figure 1
From: Reconstructing high-dimensional two-photon entangled states via compressive sensing
A schematic representation of the compressive sensing problem.
The two green planes 
and 
each correspond to individual measurements and represent two different solution spaces. The intersection of the two planes corresponds to the set of all solutions belonging to the combined space 
, indicated by the red line. The curved line represents a set of potential solutions in the space that retain the desired characteristics of our answer. Our algorithm works by iterating between the set of solutions with the desired characteristics (orange line) and the set of solutions belonging to 
(red line). After a number of iterations, the algorithm converges to the solution of 
that possesses the desired characteristics.
