Bringing up the direct show property page with IMAQdx

[kstar]

Hi

I have a USB camera which I'm trying to use with LabVIEW 2011. The camera works perfectly well, and was very easy to control with Vision Express.

However, I wish to bring up the DirectShow property page that the camera provides, so that I can set the properties. Essentially, I need some sort of a property dialog, where I can control parameters like RGB gains, exposure time etc. NI IMAQ USB from LabVIEW 8.6 did have these features. However, I don't see them in IMAQdx. How would I do this with LabVIEW 2011 and IMAQdx 9.x?

TIA.

[David-A]

Hello TIA,

You can access the camera attributes from within the Vision Acquisition Express as seen in the first picture attached.  You will find this VI in the functions palette by navigating to Vision and Motion>>Vision Express. 

You can also use the IMAQdx Property Node through the functions palette by navigating to Vision and Motion>>NI-IMAQdx.  The camera attributes from this property node can be seen second image attached.

There may also be a possiblity that you cannot access the camera attributes through LabVIEW or MAX depending on the manufacturer of the USB camera.  Please see this Knowledge Base article for more infomration

David A

[kstar]

Thanks for your response.

I understand I can set the properties in the acquisition page. But is there a way to show these properties to the user?

Like, with the IMAQ USB framework, there was a way to bring up the camera's "Direct Show property page" programmatically. I'd like to do something similar -- bring up the properties to the user programmatically, so that (s)he can set the properties during runtime.

Regards

Akarsh

[David-A]

Hi Akarsh,

You may find it helpful to look at the code being generated by the assitant.  You'll notice in the second image from my previous post there is a large pink box that contains acquisition settings.  This is a string the Vision Acquisition Assitant generated after being configured.  You can access this code by configuring an Vision Acquisition Assitant, then right clicking it and selecting "Open Front Panel" as shown in the attached image.  This will allow you to view the code it has generated, including the acqusition properties it is sending to the camera.

David A