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       COMMAND

       ssssuuuuttttuuuurrrreeee ---- ccccyyyylllliiiinnnnddddrrrriiiiccccaaaallll iiiimmmmaaaaggggeeee cccclllloooossssuuuurrrreeee eeeerrrrrrrroooorrrr aaaaddddjjjjuuuussssttttmmmmeeeennnntttt

       USAGE

       ssssuuuuttttuuuurrrreeee [----hhhhllllaaaa]

       DESCRIPTION

       SSSSuuuuttttuuuurrrreeee is designed to provide closure of the types of
       discontinuous ledges which may appear in image data as a
       result of movement of the subject during the digitizing
       scan.  If present, this type of ledge appears at the _s_e_a_m
       between the first and last longitudes of the image.

       The method of closure is to first determine the average
       difference between a narrow range of radius couples on
       either side of the image closure ledge, if present, and to
       then feather that difference proportionally over a wide
       transitional range of longitudes.  The first step of this
       procedure requires that the image be filled so that a
       meaningful average difference can be determined.

       The option switches are as follows:

       ----aaaa    Distribute 1/2 of the closure error proportionally
             over the the high longitude side of the image and 1/2
             over the low longitude side. (default)

       ----hhhh    Distribute the closure error proportionally over the
             high longitude side of the image.

       ----llll    Distribute the closure error proportionally over the
             low longitude side of the image.

       The ----aaaa option allows you to distribute the closure error
       over the entire image.  One half of the closure error is
       proportionally added to or subtracted from the low longitude
       side of the image so as to obtain closure with the aaaaverage
       of the initial and final longitudinal profiles.  Conversely,
       an appropriate proportional radial adjustment in the
       opposite sense distributes one half of the closure error
       over the high longitude side of the image so as to balance
       the closure.

       The ----hhhh and ----llll options are available for you to employ in
       those instances where you wish to effect closure by a
       proportional distribution of the closure error over either
       the hhhhigh longitude or llllow longitude side of the image.
       These two suturing options adjust the indicated side of the











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       image to close with the opposite side as you see fit.
       Accordingly, the full closure error is distributed
       proportionally over the side you choose and does so by an
       appropriate, positive or negative, proportional radial
       adjustment.

       CAVEATS

       You will nearly always need to have used the ttttoooouuuuppppeeeeeeee and
       llllttttrrrraaaannnnggggeeee commands on the image prior to using ssssuuuuttttuuuurrrreeee so that
       long stretches of extraneous zero radius non-features do not
       distort the average 0/511 mismatch.















































