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       COMMAND

       ddddeeeessssppppiiiikkkkeeee ---- rrrreeeeppppllllaaaacccceeee aaaannnnoooommmmaaaalllloooouuuussss rrrraaaaddddiiiiiiii ((((ssssppppiiiikkkkeeeessss)))) wwwwiiiitttthhhh vvvvooooiiiiddddssss

       USAGE

       ddddeeeessssppppiiiikkkkeeee _d_e_l_t_a

       DESCRIPTION

       DDDDeeeessssppppiiiikkkkeeee provides a means of removing certain types of
       anomalous radial spikes from the current image.  Such spikes
       may arise from time to time due to spurious transients
       associated with the digitizing process and may appear as
       sharp projections or sharp depressions having no apparent
       continuity with neighboring data points on the image.

       The ddddeeeessssppppiiiikkkkeeee command requires an integer argument, expressed
       in microns, which in the user's judgement is the maximum
       reasonable amplitude for surface irregularities on the
       image.  The value may be positive or negative depending on
       whether you want to detect spikes of the negative or
       positive direction in the radial sense.

       All nonvoid data points on the image are tested relative to
       their immediate neighbors above and below and if they meet
       certain criteria and the magnitude of their departure from
       the norm exceeds the value of the argument specified that
       data point is voided.

       ddddeeeesssspppp 5555000000000000

       Subsequent operations involving the current image which may
       assume or require a completely filled image must not be
       attempted after use of ddddeeeessssppppiiiikkkkeeee until such time as the ffffiiiillllllll
       command is again invoked.

       CAVEATS

       Use this command with caution on unfilled images,
       particularly if some editing of terminal edge features is
       planned.  It may be prudent to fill the interior voids prior
       to de-spiking the image.  Remember to follow up the ddddeeeessssppppiiiikkkkeeee
       command with an appropriate ffffiiiillllllll command if you do not want
       to have voids present in the image data.














