\inputdir{/wrk1/sep111/bob4}
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\input{macros_act}
\shortnote
\email{bob@sep.stanford.edu}
\title{Reference velocity selection by a generalized Lloyd method}
\author{Robert G. Clapp}
\lefthead{Clapp}
\righthead{Selecting reference velocities}
\footer{SEP--111}

\input{intro_act}

\input{theory_act}

\input{selection_act}

\input{migration_act}

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%\input{example_act}

\section{CONCLUSIONS}
Reference velocity selection shares similar characteristics with
speech compression.  By using a modified version of Lloyd's method
to select velocities the velocity at a given depth can be
more accurately described, often with fewer velocities, than conventional
approaches.  The resulting migration images can be computed faster,
with higher image quality compared to conventional methods.

\ACK
I would like to thank  BP  and SMAART JV for the synthetic datasets used in this paper.

\bibliographystyle{sep}
\bibliography{SEP,bob,GEOTLE,SEGBKS,SEGCON,MISC,WWW}

      

