NI-Vision Image Processing with Producer/Consumer Loops

This VI acquires images using the NI-IMAQdx driver and uses a producer/consumer architecture to separate the image acquisition and processing between multiple threads.

This VI acquires images using the NI-IMAQdx driver and uses a producer/consumer architecture to separate the image acquisition and processing between multiple threads.  This allows PCs with multiple cores to do complex image processing without affecting the speed at which the images are acquired.

Instructions for running:

1. Open MultiThreadIMAQdx.vi
2. Select your FireWire or GigE camera from the IMAQdx Session drop-down box
3. Run the VI

Below are screenshots of the VI's front panel and block diagram.

Font Panel

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Block Diagram

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This VI uses the IMAQ Inverse.vi to demo the processing portion inside the consumer loop.  The IMAQ Inverse.vi can be replaced with any image processing VIs.  The example uses NI-IMAQdx to acquire images from FireWire or GigE cameras, but this design can be used with analog, Camera Link, or parallel digital cameras by replacing the NI-IMAQdx VIs with the correlating NI-IMAQ VI.

Requirements

Filename: mltcoreimaqdx.vi

Software Requirements

Application Software: LabVIEW Full Development System 8.5
Toolkits and Add-Ons: LabVIEW Vision Development Module 8.2.1
Language(s): LabVIEW

Hardware Requirements

Driver: NI-IMAQdx 3.0.1

Reader Comments | Submit a comment »

Set multi threads
My system has a duo core processor and I´ m having problem to acquiring (60 and 120Hz) and save frame in AVI movie, because frames are lost. I ran the mltcoreing the problem minimize but not work so fine. How can I know if two threads are working? Is it necessary set something in LabView?
- John Souza, CEFET-MG. jkssbh@gmail.com - Aug 16, 2010