Display Images with NI Vision in LabVIEW and LabWindows/CVI

Issue Details

Solution

• Image Display Control in LabVIEW
  In LabVIEW 7.0 and later (and NI-IMAQ 2.6.1 and later), a native Image Display was integrated into LabVIEW. This control can be used to display images directly in a LabVIEW front panel. The following are some common questions and issues with the Image Display control:
  • What is the Image Display Control in LabVIEW?
  • How Can I Programmatically Clear an Image Display Control?
  • Noisy Looking Image In LabVIEW Image Display

• IMAQ WindDraw and Associated VIs
  If you have the Vision Development Module (VDM) for LabVIEW, then you can use a palette of VIs that creates an external display window (Vision » Vision Utilities » External Display). This is only available if you have VDM installed on your machine. The following are some common questions and issues with the IMAQ Vision External Display VIs:
  • How Do I Zoom Out of an Image After Zooming in With the Zoom Tool?
  • Same Image Appears in all WindDraw Windows or Image Display Controls?

• Picture Control or Intensity Graph
  If you are using an older version of LabVIEW (6.1 and prior) that does not contain the Image Display control, then there are two options for displaying the image in LabVIEW. If you have the Base version of LabVIEW, then you can use the LabVIEW Intensity Graph to display the image. If you have the Full or Professional versions of LabVIEW, then the Graphics and Sound palette will be available and you can use the Picture Control to display images. 
  
  For either of these displays, you will need to extract the 2D pixel array from the image and then use one of those indicators on the front panel. The following are some common questions and issues with Intensity Graphs and Picture Controls:
  • Why Do My IMAQ Images Displayed in Picture Control Flicker?

In LabWindows/CVI you have the following options:

• UIR Image Control
  If you have the Vision Development Module, you can access the Image Control by right clicking in an empty space of the UIR panel » Custom Controls » NI Vision » Image Control. An included example where this is displayed is OCR (with Image Control).

• imaqDisplayImage Function
  You may also choose to show your image in another window. The window becomes visible when you call the function. Furthermore, the window is associated with the image until you close the window, dispose of the image, or call this function again with the same window number. For more information regarding this function please consult page 6-11 of the IMAQ Vision for LabWindows/CVI Reference Manual. 
  
  Vision Examples for LabWindows/CVI can be found:
  <Program Files>\National Instruments\CVI2017\samples\More Samples\Vision
  which links to the following path:
  <Users>\Public\Public Documents\National Instruments\CVI\Samples\Vision

Additional Information