【IDL】如何保存IDL绘制的图像或图形

IDL进行可视化时绘制方式有直接图形法、对象图形法；显示有灰度显示、伪彩色显示、真彩色显示；文件保存又分为jpg、bmp、tif等各个格式，组合起来应用还真让人有点儿头疼。

下面对常用绘图及保存方式进行了总结，依次在显示了直接图形法下绘制灰度、伪彩色图像；对象图形法下绘制灰度、彩色图像；同时将其保存为jpg、bmp和tiff文件。

;保存为图像文件
;windowID-图像显示窗体ID
;windowDims-图像显示窗体大小
;imageFile-保存结果文件名
;type - 保存文件类型，默认为jpg
;    1:JPG;  2:bmp;  3:tiff
PRO SAVEDIFFERENTIMAGE, windowID,windowDims, imageFile,type=type
  ;置顶为当前显示
  WSET,windowID
  ;拷屏操作
  data = TVRD(0,0,windowDims[0],windowDims[1],/true)
  CASE type OF
    1: WRITE_JPEG, imageFile, data,/true, quality=100
    2: WRITE_BMP,imageFIle,data,/RGB
    3: WRITE_TIFF,imageFile, data,ORIENTATION =4
    ELSE:
  ENDCASE
 
END

;保存显示的图形
PRO TESTSAVEIMAGE
  winSize = [420,420]
  ;直接图形法
  data = DIST(400)
  ;灰度绘制显示
  DEVICE,decomposed =1
  WINDOW,1,xsize = winSize[0],ysize = winSize[1]
  TV,data
  ;直接保存为jpeg
  SAVEDIFFERENTIMAGE,1,winSize, 'c:\temp\1.jpg',/type
  ;直接保存为tiff
  SAVEDIFFERENTIMAGE,1,winSize, 'c:\temp\1.bmp',type =2
  ;直接保存为bmp
  SAVEDIFFERENTIMAGE,1,winSize, 'c:\temp\1.tif',type =3
 
  ;伪彩色显示
  DEVICE,decomposed =0
  LOADCT,5
  WINDOW,2,xsize = winSize[0],ysize = winSize[1]
  TV,data
  ;直接保存为jpeg
  SAVEDIFFERENTIMAGE,2,winSize, 'c:\temp\2.jpg',/type
  ;直接保存为tiff
  SAVEDIFFERENTIMAGE,2,winSize, 'c:\temp\2.bmp',type =2
  ;直接保存为bmp
  SAVEDIFFERENTIMAGE,2,winSize, 'c:\temp\2.tif',type =3
 
  ;对象图形法-灰度图像
  oWindow = OBJ_NEW('IDLgrWindow',dimension = winSize,$
    title ='灰度图像')
  oView = OBJ_NEW('IDLgrView',viewPlane_Rect = [0,0,winSize])
  oModel= OBJ_NEW('IDLgrModel')
  oImage= OBJ_NEW('IDLgrImage',DIST(400))
  ;层次体系与绘制
  oModel->ADD,oImage
  oView->ADD,oModel
  oWindow->SETPROPERTY, graphics_tree = oView
  oWindow->DRAW
  ;
  oPrint = oWindow.READ()
  oPrint->GETPROPERTY, data = data
  HELP,data
  ;后面保存不写了，与SAVEDIFFERENTIMAGE中tvrd后结果一样；
 
  ;对象图形法-伪彩色图像
  oWindow1 = OBJ_NEW('IDLgrWindow',dimension = winSize,$
    title ='伪彩色图像')
  oView1 = OBJ_NEW('IDLgrView',viewPlane_Rect = [0,0,winSize])
  oModel1= OBJ_NEW('IDLgrModel')
  ;颜色表
  oPalette = OBJ_NEW('IDLgrPalette')
  oPalette.LOADCT,5
  oImage1= OBJ_NEW('IDLgrImage',DIST(400),PALETTE = oPalette)
  ;层次体系与绘制
  oModel1->ADD,oImage1
  oView1->ADD,oModel1
  oWindow1->SETPROPERTY, graphics_tree = oView1
  oWindow1->DRAW
  ;
  oPrint = oWindow.READ()
  oPrint->GETPROPERTY, data = data
  HELP,data
;后面保存不写了，与SAVEDIFFERENTIMAGE中tvrd后结果一样；
 
END

标签：OBJ,SAVEDIFFERENTIMAGE,绘制,IDL,winSize,type,NEW,图形,data
来源： https://www.cnblogs.com/enviidl/p/16355188.html