USB Camera without expensive software

[LuisMontoya]

Do any body use a USB Camera to compare Images or do Image processing without buy expensive software?

NI software to do that is very expensive, for that reason I'm looking for VI's than can compare images free,,

Anybody has something?

[moderator1983]

You develop you own code/VIs/function to perform the comparision...!!
Are you aware of http://opencv.org/. It offers many functions and is absolutely free, all you need is to write LabVIEW wrapper.

[MarisolM]

Hey Luis;

In order to use a USB camera that can be recognized with LabVIEW you will need a compatible driver, the best option would be to use IMAQdx that comes with the  Vision Development Module; however, this tool needs to be purchased. 

Once you can acquire an image using LV, then the image analysis tools, as mentioned by moderator1983, will need to be donwloaded from the open source site and modified to be used in LabVIEW.

Good luck with your application

[pjr1121]

Found this link a while back, https://forums.ni.com/t5/LabVIEW/2-hours-finished-the-webcam-program/m-p/782481/highlight/true#M3577...

It takes a picture box and turns it into a capture window, which is then used for the webcam connected to your pc.  This uses user32.dll functions.  You can use the GetImage invoke node to get the image currently displayed on the picturebox.