This is a utility routine to perform a gaussian gray-level pixel transformation
  stretch on an image.

Categories

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    Image Processing
   

Returns

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    A byte scaled image is returned.

Params

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    image: in, required
      The image to be scaled. Written for 2D images, but arrays of any size are treated alike.

Keywords

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    max: in, optional
          Any value in the input image greater than this value is set to this value
          before scaling.
    min: in, optional
          Any value in the input image less than this value is set to this value
          before scaling.
    negative, in, optional, type=boolean, default=0
          If set, the "negative" of the result is returned.
    omax: in, optional, type=byte, default=255
          The output image is scaled between OMIN and OMAX.
    omin: in, optional, type=byte, default=0
          The output image is scaled between OMIN and OMAX.
         
    sigma: in, optional, type=float, default=1.0
        The sigma value or width of the Gaussian function.

Examples

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      cgLoadCT, 0 ; Gray-scale colors.
      image = cgDemoData(11) ; Load image.
      cgImage, cgGaussScl(image)

Author

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      FANNING SOFTWARE CONSULTING::
          David W. Fanning
          1645 Sheely Drive
          Fort Collins, CO 80526 USA
          Phone: 970-221-0438
          E-mail: david@idlcoyote.com
          Coyote's Guide to IDL Programming: http://www.idlcoyote.com

History

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    Change History::
      Written by: David W. Fanning, 5 September 2007.
      Now setting NAN keyword on all MIN and MAX functions. 2 Dec 2011. DWF.
      Renamed cgGaussScl from the retired GaussScl. 26 March 2015. DWF.

Copyright

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    Copyright (c) 2007-2015, Fanning Software Consulting, Inc.