/usr/share/gnudatalanguage/coyote/cggaussscl.pro is in gdl-coyote 2016.11.13-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | ; docformat = 'rst'
;
; NAME:
; cgGaussScl
;
; PURPOSE:
; This is a utility routine to perform a gaussian gray-level pixel transformation
; stretch on an image.
;
;******************************************************************************************;
; ;
; Copyright (c) 20150, by Fanning Software Consulting, Inc. All rights reserved. ;
; ;
; Redistribution and use in source and binary forms, with or without ;
; modification, are permitted provided that the following conditions are met: ;
; ;
; * Redistributions of source code must retain the above copyright ;
; notice, this list of conditions and the following disclaimer. ;
; * Redistributions in binary form must reproduce the above copyright ;
; notice, this list of conditions and the following disclaimer in the ;
; documentation and/or other materials provided with the distribution. ;
; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ;
; contributors may be used to endorse or promote products derived from this ;
; software without specific prior written permission. ;
; ;
; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''AS IS'' AND ANY ;
; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ;
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT ;
; SHALL FANNING SOFTWARE CONSULTING, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, ;
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED ;
; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ;
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ;
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ;
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ;
;******************************************************************************************;
;
;+
; This is a utility routine to perform a gaussian gray-level pixel transformation
; stretch on an image.
;
; :Categories:
; Image Processing
;
; :Returns:
; A byte scaled image is returned.
;
; :Params:
; image: in, required
; The image to be scaled. Written for 2D images, but arrays of any size are treated alike.
;
; :Keywords:
; 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:
; Display a Gaussian scaled image::
; cgLoadCT, 0 ; Gray-scale colors.
; image = cgDemoData(11) ; Load image.
; cgImage, cgGaussScl(image)
;
; :Author:
; 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:
; 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:
; Copyright (c) 2007-2015, Fanning Software Consulting, Inc.
;-
FUNCTION cgGaussScl, image, $
SIGMA=sigma, $
MAX=imageMax, $
MIN=imageMin, $
NEGATIVE=negative, $
OMAX=maxOut, $
OMIN=minOut
; Return to caller on error.
On_Error, 2
; Check arguments.
IF N_Elements(image) EQ 0 THEN Message, 'Must pass IMAGE argument.'
; Check for underflow of values near 0. Yuck!
curExcept = !Except
!Except = 0
i = Where(image GT -1e-35 AND image LT 1e-35, count)
IF count GT 0 THEN image[i] = 0.0
void = Check_Math()
!Except = curExcept
output = image
; Check keywords.
IF N_Elements(imageMax) EQ 0 THEN imageMax = Max(output, /NAN)
IF N_Elements(imageMin) EQ 0 THEN imageMin = Min(output, /NAN)
IF N_Elements(maxOut) EQ 0 THEN maxOut = 255B ELSE maxout = 0 > Byte(maxOut) < 255
IF N_Elements(minOut) EQ 0 THEN minOut = 0B ELSE minOut = 0 > Byte(minOut) < 255
IF minOut GE maxout THEN Message, 'OMIN must be less than OMAX.'
IF N_Elements(sigma) EQ 0 THEN sigma = 1 ELSE sigma = sigma > 0.25
; Perform initial scaling of the image.
output = cgScaleVector(Temporary(output), 0.0D, 1.0D, MinValue=imageMin, MaxValue=imageMax, /NAN, Double=1)
; Perform Gaussian scaling.
output = cgScaleVector(Temporary(output), -!pi, !pi)
f = (1/(sigma*sqrt(2*!dpi)))*Exp(-(Temporary(output)^2/(2*sigma^2)))
output = cgScaleVector(Temporary(f), minOut, maxOut)
; Does the user want the negative result?
IF Keyword_Set(negative) THEN RETURN, BYTE(0B > (maxout - Round(output) + minOut) < 255B) $
ELSE RETURN, BYTE(0B > Round(output) < 255B)
END
|