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RADON2

RADON2

Name


      RADON2

Purpose


      Compute the Radon Transform using the FFT method.

Category


Calling Sequence


      t = radon2(img)

Inputs


      img = input image. Must be square. in

Keyword Parameters


Keywords


        EMBED=n size of zero image to embed given image in.
          Def=no embed.
        START=a1 start angle in degrees, default=0.
        STOP=a2 stop angle in degrees, default=179.
        STEP=da angle step in degrees, default=1.
        ANGLES=ang returned list of angles used.
        /DEBUG does a debug stop.

Outputs


      t = Radon Transform of img. out

Common Blocks


      radon2_com

Notes


      Notes: Images must be byte.
        No preprocessing is done.
        It may be useful to subtract the mean.
        Ref: Linear feature detection and enhancement in noisy
          images via the Radon transform,
          Lesley M. Murphy, Patt. Rec. Letters 4 (1986) 279.

Modification History


      R. Sterner, 16 Oct, 1990
      R. Sterner, 1998 Mar 10 --- Cleaned up a bit, no longer byte only.
      R. Sterner, 2003 May 22 --- Renamed to radon2.pro.
  Copyright (C) 1990, 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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