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      Map an X/Y image to an angle/radius image.


Calling Sequence

      ar = imgrecpol(xy, x1, x2, y1, y2, a1, a2, da, r1, r2, dr)


      xy = X/Y image. in
      x1, x2 = start and end x in xy. in
      y1, y2 = start and end y in xy. in
      a1, a2, da = start ang, end ang, ang step (deg). in
      r1, r2, dr = start radius, end radius, radius step. in

Keyword Parameters


        /BILINEAR does bilinear interpolation,
          else nearest neighbor is used.
        /MASK masks values outside image to 0.


      ar = returned angle/radius image. out
        Angle is in x direction, and radius is in y direction.

Common Blocks


      Notes: Angle is 0 along + X axis and increases CCW.

Modification History

      R. Sterner. 11 July, 1986.
      R. Sterner, 4 Sep, 1991 --- converted to IDL vers 2.
      R. Sterner, 5 Sep, 1991 --- simplified and added bilinear interp.
      Johns Hopkins Applied Physics Lab.
  Copyright (C) 1986, 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.

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