Access IMAQ Images Based on their Pointer using LabVIEW

[Matt-J]

Overview

This example rdemonstrates how to access an IMAQ image by its pointer.

Description

Two VIs are used in this example. The first VI, Create Image.vi creates a space in memory for IMAQ to place an image, and then reads an image file from disk based on a dialog box. It then keeps this reference open until the display VI stops its running loop via a notifier. The second VI, Display IMAQ Image from Pointer.vi, allows the user to specify a string which is then type cast to IMAQ type. By doing this, LabVIEW now associates this IMAQ wire with any IMAQ session created under the same name. So, this second VI, running in parallel, may access and display the image created by the Create Image VI. This method will only work across VIs/custom devices running on the same machine.

Requirements

 Software

• LabVIEW Base Development System 2012 (or compatible)
• NI Vision Development 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 file
2. Run the program

Additional Information or References

    

    

**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.**

[Tinnotek]

Nice approach!!!

This technique allow us to access the image anywhere in the application with string.

I tried to use this technique to control the CCD and it worked well though.

You can try to use a string constant "cam0" type casted to CCD session then snap some image.

It just works the same as this approach.