Name

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      BINBOUND

Purpose

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      For binary image return array with boundary points set to 1.

Category

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Calling Sequence

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      b = binbound(bin_image)

Inputs

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      bin_image = byte binary image (only 0 or 1). in

Keyword Parameters

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Outputs

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      b = array with boundary points set to 1. out

Common Blocks

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Notes

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      Notes: The boundary of a binary image is the set of points
        in the image that are 1 and also touch a 0.
        A binary image may be made using logical operators.
        For example, if an image has both positive and negative
        values the boundary between them may be found as
        b = binbound(img gt 0). To put this boundary into
        another image, A, do:
        w = where(b eq 1) & a(w) = 255.

Modification History

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      R. Sterner. 24 June, 1987.
      R. Sterner, 4 Dec, 1989 --- Converted to Sun.
R. Sterner, 21 Nov, 1991 --- removed a multiply.
      Johns Hopkins University Applied Physics Laboratory.
  Copyright (C) 1987, Johns Hopkins University/Applied Physics Laboratory
  This software may be used, copied, or redistributed as long as it is not
  sold and this copyright notice is reproduced on each copy made. This
  routine is provided as is without any express or implied warranties
  whatsoever. Other limitations apply as described in the file disclaimer.txt.