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SCALE_DB

SCALE_DB

Name


      SCALE_DB

Purpose


      Scale given data to db (meant for images).

Category


Calling Sequence


      d = scale_db(p, db, pmax, minout, maxout)

Inputs


      p = original data. in
      db = Decibel range to cover. in
      pmax = reference value to map to 0 db. in
      minout = value to map -DB db to. in
      maxout = value to map 0 db to. in

Keyword Parameters


Keywords


        /NOCLIP means do not clip values to stay in
          range -db to 0. This allows saturation for
          pmax < max(p).
        MAXDB=mxdb Returned max db. Useful with /NOCLIP.

Outputs


      d = scaled values. out

Common Blocks


Notes


Modification History


      R. Sterner. 3 Apr, 1987.
      R. Sterner, 15 Jul, 1991 --- updated to IDL V2.
      Johns Hopkins University Applied Physics Laboratory.
      R. Sterner, 2010 Jun 04 --- Converted arrays from () to [].
  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.



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