The first transformation deals with propagating of waves from the object plane to the lens (in order to create synthetic datasets for testing).
In order to test the algorithms we use a single test object plane to generate synthetic measured wavefronts at [U.
One way to deal with this is compute the expected initial phase for each angle at each point in the object plane but this would require foreknowledge of the optical path between the illuminator and each point.
The MPEG-4 standard describes the parts of a rudimentary form of object-based compression through "Video Object Planes
," facial modeling, and 3D object modeling -- providing only a definition of these concepts without providing the means of applying these directly towards the goal of high compression ratios.