Acquire image from 4 usb webcams programtically...

[Prart]

Hello,

Could anyone suggest me,please? I used Labview v6.1i and I don't have NI-VISION. I want to acquire image from 4 usb webcams programtically...start from webcam#1 -->#2--->#3 and finally #4. I've downloaded "Labview Webcam Library" from http://www.cs.unc.edu/~parente/labview/index.shtml
but this library can capture image from only webcam#1.
I know that we can use NI-IMAQ for USB Cameras to control each webcam by ref number. but I don't have LabVIEW v7.0 and NI-Vision. so how can I build my own VI with LabVIEW v6.1i to control each webcam by indicate ref number of each webcam like NI-IMAQ for USB Camera. Thank you.

[RManion]

Hi Prart,

Like you said, the acquisition from your USB camera could be handled by NI IMAQ for USB. This does require NI Vision.

Since it sounds like you are attempting to do this without Vision or any other tools, you will probably need to interact with your camera's driver through dll calls. Unfortunately this may vary from camera to camera and will probably be pretty tough. I would recommend that you start by finding out more information about how to communicate with and control your USB camera.

Good luck!

Robert