Remove Thin Bones in Skeleton of Continuous Wavelet Transform
[skellist,skelptr,skellen] = PruneSkelMap(cw,dynrange,persist,skm,skp,skl)
signal length
kill branch when it reaches amplitude less than this fraction of level norm
kill branch if it doesn't span persist octaves
storage for list of chains
vector of length nchain -- pointers to heads of chains
vector of length nchain -- length of skellists
storage for list of chains
vector of length nchain --pointers to heads of chain
vector of length nchain -- length of skellists
Backwards pruning of ``weak amplitudes'': i.e. amplitudes smaller than dynrange * norm at scale a
Ridges are deleted from skeleton if they Fail to have a length greater than persist octaves