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How to Overlay Cross Hair on an Image and Calculate the Distance using Vision Development Module

by: Member
‎05-03-2010 12:16 PM
Last Edited by: Member Example_Scrubber_Stephan ‎06-07-2017 03:54 AM

Products and Environment

This section reflects the products and operating system used to create the example.

To download NI software, including the products shown below, visit ni.com/downloads.

    Software

  • Vision Development Module
  • LabVIEW

Code and Documents

Attachment

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Overview

This VI demonstrates how to overlay the cross hair on an image and calculate the distance between a center of a circle
 and the cross hair.

 

Description

This VI overlays a cross hair on an image and determine the distance to the center of a circle. In this example, the crosshair location can be specified by the user by selecting the location on the example image or by changing the coordinates of the cross hair. The distance from the cross hair to the center of a circle is displayed.

 

Requirements

 Software

  • LabVIEW Base Development System 2012 (or compatible)
  • NI Vision Development Module 2012 (or compatible)
  • If running in a Real-Time context, you will need the LabVIEW Real-Time Module 2012 (or compatible)

 Hardware

  • No hardware is necessary to use this example VI

 

 Steps to Implement or Execute Code

  1. Download and open the attached ZIP-file
  2. Open the VI and follow the instructions inside

 

Additional Information or References

Overlay Cross Hair and Calculate Distance LV2012 NIVerified.vi - Front Panel.png
 

Overlay Cross Hair and Calculate Distance LV2012 NIVerified.vi - Block Diagram.png

 

 

 **The code for this example has been edited to meet the new Community Example Style Guidelines. The edited copy is marked with the text ‘NIVerified’. Read here for more information about the new Example Guidelines and Community Platform.**

Tejinder Gill
National Instruments
Applications Engineer
Visit ni.com/gettingstarted for step-by-step help in setting up your system.

Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.