In order to more closely allign my research with the class project, 
I am changing the scope (admittedly, making it bigger) to include motion
analysis of all layers - not just the background scene. For each layer, I
am attempting to find an older layer which can be modified (using a 
3D affine transform) to match the new one. To start with, I will use 
Numerical Recipies in C's Simplex Method (amoeba.c) to do the error,
minimization. This is not a very fast method, but it will facilitate
prototyping. 

Initially, I will just report the amount of X or Y tranlation necessary
to get the best match between two layers.