IMAQ for USB Image Resolution

[AMFM]

Hello,

I am running Labview 7.1/Vision 7.1 and using IMAQ for USB with a WinTV USB-Live video capture module from Hauppauge. Trying to migrate an application from traditional PCI image capture from a Sony (RS-170) camera. I can get basic video capture working.

I can only seem to get image acquisition at 320 x 240. I need the more standard 640 x 480. Any suggestions? Can the settings be changed? I have tried this both in LabView and in Vision Assistant 7.1 with no luck.

Do I need a different USB capture product?

Thanks,

G

[MarcoPolo5]

G,

Does your USB device support video quality greater that 320x240? Hauppauge has a number of devices and I was not able to tell from a few initial searches about what video formats the USB devices support. I would look at the documentation that comes with the USB converter or contact Hauppauge. If the device does support 640x480, then you might just need to change it through the 'IMAQ USB PropertyPage.vi' (this simply opens the manufacturers config page). Also, make sure you have the latest drivers for the device.

I hope that helps out - good luck with your projects,

[Ancle]

I tried to use the usb property node to change resolution,but it doesn't work. So, I used the IMAQ Resample.vi to change resolution became 640x480.(interpolation type set to "Bi-Linear")

[pallen]

Hello Mark,

Thanks for providing some input on this thread. The IMAQ USB tools may be exactly what I need as some preliminary tools for a very big project.

Everything appears to work as it should with my Intel CS430 Camera. We have also recently acquired NI Vision 7.1.1 and the IMAQ USB toolkit allows me to acquire images from my Intel webcam as well.

I've modified the Snap.vi so that I can set the video properties. What I'm hoping to do is find a way to set the resolution to 640x480 for all images. Right now I can change the resolution in the Grab with Property.vi But it resets back to it's default on restart.

I've looked for a way to change the camera's default resolution. But so far I have not found one.

Any ideas would be greatly appreciated.

[MarcoPolo5]

The defaut image resolution for your camera will depend on the driver settings that the camera manufatuer has set - and the driver will also determine if changing video resolution will be saved or not upon startup. Unfortunatley most USB camera manufactuers have not provided much control through their DirectShow interfaces.

Firewire cameras with the IMAQ 1394 driver provide much more control and settings are saved on restart. If these feauters are crucial, you might want to look at the firewire option.

Good luck with your application!