This module computes the affine invariant \index{affine!invariance}
dictionary of a list of curves. 
This list is typically the result of the module \verb+ll_boundaries+ 
followed by \verb+gass+ (see \verb+KM_DEMO+ for an example), 
which yields the smoothed maximal meaningful 
level lines of an image. For each line in the list, the module 
\verb+km_codecurve_ai+ computes codes which are added to the dictionary.

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The result is stored in an Flists structure.

