/usr/share/gnudatalanguage/coyote/windowimage.pro is in gdl-coyote 2016.11.13-2.
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;
; NAME:
; WindowImage
;
; PURPOSE:
; Allows the user to interactively adjust image contrast by means of "windowing and
; leveling" the image. Move the cursor vertically in the window to adjust the image
; stretch "window". Move the cursor horizontally in the window to adjust the image
; "level".
;
;******************************************************************************************;
; ;
; Copyright (c) 2010, 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. ;
;******************************************************************************************;
;
PRO WindowImage_OriginalSettings, event
; This event handler resotres the original window settings.
; Error handling.
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /CANCEL
void = cgErrorMsg()
IF N_Elements(info) NE 0 THEN $
Widget_Control, event.top, SET_UVALUE=info, /NO_COPY
RETURN
ENDIF
; Get the program information.
Widget_Control, event.top, GET_UVALUE=info, /NO_COPY
; Restore original contrast and brightness values.
contrast = 50
brightness = 50
level = (1-brightness/100.)*(info.maxImage - info.minImage) + info.minImage
width = (1-contrast/100.)*(info.maxImage - info.minImage)
; Calculate the window size.
displayMax = (level + (width / 2))
displayMin = (level - (width / 2))
IF displayMax GT info.maxImage THEN BEGIN
difference = Abs(displayMax - info.maxImage)
displayMax = displayMax - difference
displayMin = displayMin - difference
ENDIF
IF displayMin LT info.minImage THEN BEGIN
difference = Abs(info.minImage - displayMin)
displayMin = displayMin + difference
displayMax = displayMax + difference
ENDIF
; Store everything.
info.iWindow = [displayMin, displayMax]
info.iLevel = level
info.contrast = contrast
info.brightness = brightness
info.x = -1
info.y = -1
; Display it in the window.
WindowImage_Display, info
Widget_Control, event.top, Set_UValue=info, /No_Copy
END ;---------------------------------------------------------------------------
PRO WindowImage_Quit, event
Widget_Control, event.top, /Destroy
END ;---------------------------------------------------------------------------------------
PRO WindowImage_Resize, event
; Error handling.
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /CANCEL
void = cgErrorMsg()
IF N_Elements(info) NE 0 THEN $
Widget_Control, event.top, SET_UVALUE=info, /NO_COPY
RETURN
ENDIF
; Get the program information.
Widget_Control, event.top, GET_UVALUE=info, /NO_COPY
; Calculate a new draw widget size.
newx =info.labelxsize > event.x
newy = event.y - info.labelysize - 86
; Calculate a window size for the image. Maximum of 800 pixels. Minimum of 400.
maximageSize = Max([newx, newy])
wsize = MaxWindowSize()
IF info.imageAspect GE 1 THEN BEGIN
maxSize = wsize[1] < (maxImageSize > 200)
ywinsize = maxsize
xwinsize = (maxsize / info.imageAspect) < wsize[0]
ENDIF ELSE BEGIN
maxSize = wsize[0] < (maxImageSize > 200)
xwinsize = maxsize
ywinsize = (maxsize * info.imageAspect) < (wsize[1] - info.labelysize - 86)
ENDELSE
; Resize the draw widgets.
Widget_Control, info.imgDrawID, DRAW_XSIZE=xwinSize, DRAW_YSIZE=ywinsize
Widget_Control, info.cbDrawID, DRAW_XSIZE=xwinSize
; Redisplay the image.
WindowImage_Display, info
; Put the program information back in storage.
Widget_Control, event.top, SET_UVALUE=info, /NO_COPY
END ;---------------------------------------------------------------------------------------
PRO WindowImage_DrawEvents, event
; Error handling.
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /CANCEL
void = cgErrorMsg()
IF N_Elements(info) NE 0 THEN $
Widget_Control, event.top, SET_UVALUE=info, /NO_COPY
RETURN
ENDIF
; What kind of event is this?
possibleEvents = ['DOWN', 'UP', 'MOTION', 'VIEWPORT', 'EXPOSE']
thisEvent = possibleEvents[event.type]
CASE thisEvent OF
'DOWN': BEGIN
; Get the program information.
Widget_Control, event.top, GET_UVALUE=info, /NO_COPY
; Set the initial point.
info.x = event.x
info.y = event.y
; Clear events for this widget.
Widget_Control, event.id, /CLEAR_EVENTS
; Turn motion events on.
Widget_Control, event.ID, DRAW_MOTION_EVENTS=1
; Put the program information back in storage and return.
Widget_Control, event.top, SET_UVALUE=info, /NO_COPY
RETURN
END
'UP': BEGIN
; Get the program information.
Widget_Control, event.top, GET_UVALUE=info, /NO_COPY
; Turn motion events off and clear any queued up events.
Widget_Control, event.ID, DRAW_MOTION_EVENTS=0
Widget_Control, event.id, /CLEAR_EVENTS
; Calculate new contrast/brightness values.
contrast = 0 > ((info.y - event.y) * info.cstep + info.contrast) < 99
brightness = 0 > ((info.x - event.x) * info.bstep + info.brightness) < 100
level = (1-brightness/100.)*(info.maxImage - info.minImage) + info.minImage
width = (1-contrast/100.)*(info.maxImage - info.minImage)
; Calculate new display min/max.
displayMax = (level + (width / 2))
displayMin = (level - (width / 2))
IF displayMax GT info.maxImage THEN BEGIN
difference = Abs(displayMax - info.maxImage)
displayMax = displayMax - difference
displayMin = displayMin - difference
ENDIF
IF displayMin LT info.minImage THEN BEGIN
difference = Abs(info.minImage - displayMin)
displayMin = displayMin + difference
displayMax = displayMax + difference
ENDIF
; Store everything.
info.iWindow = [displayMin, displayMax]
info.iLevel = level
info.contrast = contrast
info.brightness = brightness
info.x = event.x
info.y = event.y
; Display the undated image.
WindowImage_Display, info
; Put the program information back in storage and return.
Widget_Control, event.top, SET_UVALUE=info, /NO_COPY
END
'MOTION': BEGIN
; Get the program information.
Widget_Control, event.top, GET_UVALUE=info, /NO_COPY
; Calculate new contrast/brightness values.
contrast = 0 > ((info.y - event.y) * info.cstep + info.contrast) < 99
brightness = 0 > ((info.x - event.x) * info.bstep + info.brightness) < 100
level = (1-brightness/100.)*(info.maxImage - info.minImage) + info.minImage
width = (1-contrast/100.)*(info.maxImage - info.minImage)
; Calculate new display min/max.
displayMax = (level + (width / 2))
displayMin = (level - (width / 2))
IF displayMax GT info.maxImage THEN BEGIN
difference = Abs(displayMax - info.maxImage)
displayMax = displayMax - difference
displayMin = displayMin - difference
ENDIF
IF displayMin LT info.minImage THEN BEGIN
difference = Abs(info.minImage - displayMin)
displayMin = displayMin + difference
displayMax = displayMax + difference
ENDIF
; Store the information.
info.iWindow = [displayMin, displayMax]
info.iLevel = level
; Update the image.
WindowImage_Display, info
; Put the program information back in storage and return.
Widget_Control, event.top, SET_UVALUE=info, /NO_COPY
END
ENDCASE
END ;---------------------------------------------------------------------------------------
PRO WindowImage_Display, info
cgSetColorState, 1, CURRENTSTATE=currentState
; Load the color table.
cgLoadCT, info.colortable, REVERSE=info.reverse, BREWER=info.brewer, NCOLORS=253
TVLCT, cgColor(info.neutralColor, /TRIPLE), 254
; Draw the image.
WSet, info.imgWinID
cgImage, info.image, SCALE=info.scale, NCOLORS=253, /Keep, $
MINVALUE=info.iwindow[0], MAXVALUE=info.iwindow[1], NOERASE=1
; Draw the color bar.
WSet, info.cbWinID
cgErase
cgColorbar, NCOLORS=253, CLAMP=info.iwindow, NEUTRALINDEX=254, $
POSITION=[0.05, 0.35, 0.95, 0.65], FONT=0, ANNOTATECOLOR='black', $
RANGE=[info.minImage, info.maxImage], DIVISIONS=5, FORMAT='(F0.2)'
; Write a label on the color bar.
format = '(F0.3)'
txt = 'Window: [' + String(info.iwindow[0], FORMAT=format) + ', ' + $
String(info.iwindow[1], FORMAT=format) + '] Level: ' + $
String(info.ilevel, FORMAT=format)
cgText, 0.5, 0.75, /Normal, Alignment=0.5, Font=0, txt, Color='black'
cgSetColorState, currentState
END ;---------------------------------------------------------------------------------------
;+
; :Description:
; Allows the user to interactively adjust image contrast by means of "windowing and
; leveling" the image. Move the cursor vertically in the window to adjust the image
; stretch "window". Move the cursor horizontally in the window to adjust the image
; "level".
;
; :Categories:
; Graphics
;
; :Params:
; image: in, required, type=any
; Any 2D array that you wish to adjust the contrast of.
;
; :Keywords:
; brewer: in, optional, type=boolean, default=0
; Set this keyword to indicate a Brewer color table is desired.
; colortable: in, optional, type=integer, default=0
; The index number of a color table to load with cgLoadCT.
; neutralcolor: in, optional, type=string
; The name of the color to use for values outside the image "window" in
; the color table. If a default grayscale color table is loaded, the default
; color is "rose", otherwise the default is "black".
; reverse: in, optional, type=boolean, default=0
; Set this keyword if you wish to reverse the color table.
;
; :Examples:
; To see a demonstation::
; IDL> WindowImage
;
; :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, 29 November 2010. DWF.
; Added color protection to the program. 30 Nov 2010. DWF.
; Modification of cgImage command to prevent flashing. 27 Feb 2011. DWF.
;
; :Copyright:
; Copyright (c) 2010, Fanning Software Consulting, Inc.
;-
PRO WindowImage, image, $
BREWER=brewer, $
COLORTABLE=colortable, $
NEUTRALCOLOR=neutralColor, $
REVERSE=reverse
Compile_Opt idl2
; Error handling.
Catch, theError
IF theError NE 0 THEN BEGIN
Catch, /CANCEL
void = cgErrorMsg()
RETURN
ENDIF
; Check parameters.
IF N_Elements(image) EQ 0 THEN BEGIN
filename = Filepath(Subdir=['examples','data'], 'muscle.jpg')
Read_JPEG, filename, image
ENDIF
minImage = Min(image, MAX=maxImage, /NAN)
IF (minImage LT 0) OR (maxImage GT 253) THEN scale = 1 ELSE scale = 0
brewer = Keyword_Set(brewer)
reverse = Keyword_Set(brewer)
IF N_Elements(colortable) EQ 0 THEN BEGIN
IF N_Elements(neutralColor) EQ 0 THEN neutralColor = 'rose'
IF brewer THEN BEGIN
cgLoadCT, 17, REVERSE=reverse, BREWER=1, NCOLORS=253
colortable = 17
ENDIF ELSE BEGIN
cgLoadCT, 0, REVERSE=reverse, BREWER=0, NCOLORS=253
colortable = 0
ENDELSE
ENDIF ELSE BEGIN
IF N_Elements(neutralColor) EQ 0 THEN neutralColor = 'gray'
cgLoadCT, colortable, REVERSE=reverse, BREWER=brewer, NCOLORS=253
ENDELSE
TVLCT, cgColor(neutralColor, /TRIPLE), 254
IF N_Elements(ilevel) EQ 0 THEN ilevel = (maxImage - minImage) / 2.0
IF N_Elements(iwindow) EQ 0 THEN BEGIN
w20 = (maxImage - minImage) * 0.20
iwindow = minImage > [ilevel - w20, ilevel + w20] < maxImage
ENDIF
IF (iLevel LT iwindow[0]) OR (iLevel GT iwindow[1]) THEN BEGIN
ilevel = (iwindow[1] - iwindow[0]) / 2.0
ENDIF
; Check image, get dimensions.
IF Size(image, N_DIMENSIONS=1) NE 2 THEN Message, 'The image argument must be 2D.'
s = Size(image, /DIMENSIONS)
xsize = s[0]
ysize = s[1]
imageAspect = Float(s[1])/s[0]
; Calculate a window size for the image. Maximum of 800 pixels. Minimum of 400.
maximageSize = Max([xsize, ysize])
maxSize = 800 < (maxImageSize > 400)
IF imageAspect GE 1 THEN BEGIN
ywinsize = maxsize
xwinsize = maxsize / imageAspect
ENDIF ELSE BEGIN
xwinsize = maxsize
ywinsize = maxsize * imageAspect
ENDELSE
; Create widgets.
tlb = Widget_Base(Title='Image Window/Leveling', Column=1, MBar=menuID, $
Base_Align_Center=1, TLB_Size_Events=1, YPAD=0)
fileID = Widget_Button(menuID, Value='File')
button = Widget_Button(fileID, Value='Restore Original Settings', $
Event_Pro='WindowImage_OriginalSettings')
quitID = Widget_Button(fileID, Value='Quit', Event_Pro="WindowImage_Quit", /Separator)
cbDrawID = Widget_Draw(tlb, XSize=xwinsize, YSize=80)
imgDrawID = Widget_Draw(tlb, XSize=xwinsize, YSize=ywinsize, Button_Events=1, $
Event_Pro='WindowImage_DrawEvents')
labelID = Widget_Label(tlb, Value='Drag cursor horizontally for BRIGHTNESS, ' + $
'vertically for CONTRAST.', /Dynamic_Resize)
Widget_Control, tlb, /REALIZE
; Get window index numbers.
Widget_Control, cbDrawID, Get_Value=cbWinID
Widget_Control, imgDrawID, Get_Value=imgWinID
; Find the Y screen sizes of the label widget.
g = Widget_Info(labelID, /Geometry)
labelysize = g.scr_ysize
labelxsize = g.scr_xsize
; Create an info structure to hold program information.
info = { image: image, $
xsize: xsize, $
ysize: ysize, $
labelxsize: labelxsize, $
labelysize: labelysize, $
iWindow: iWindow, $
iLevel: iLevel, $
cbWinID: cbWinID, $
imgWinID: imgWinID, $
scale: scale, $
colortable: colortable, $
neutralcolor: neutralcolor, $
brewer: brewer, $
reverse: reverse, $
x: -1, $
y: -1, $
imageAspect: imageAspect, $
imgDrawID: imgDrawID, $
cbDrawID: cbDrawID, $
contrast: 50, $
brightness: 50, $
cstep: ysize / 512., $
bstep: xsize / 2048., $
minImage: minImage, $
maxImage: maxImage }
; Display the initial window contents.
WindowImage_Display, info
Widget_Control, tlb, SET_UVALUE=info, /NO_COPY
XManager, 'windowimage', tlb, /NO_BLOCK, EVENT_HANDLER='WindowImage_Resize'
END ;---------------------------------------------------------------------------------------
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