Enhancing USB Camera Image Resolution in LabVIEW

[7ayoraider]

I used imaqdx on another computer today running labview 2011, and the webcam works! I was able to acquire an image at 2.0M pixel; the only problem is the webcam is cheap and doesn't have auto focus, now I need to find another usb webcam, any suggestions ??

[MissFitt]

Hi 7ayoriader,

I'm glad you got it working! You can go to our Industrial Camera Advisor page and see a list of supported cameras. Hope this helps!

Mychal F

[brjohns]

On the subject of camera focus, I was wondering if it is possible to adjust this from within Labview? Preferably, I would like to have a focus slider bar that I can adjust from the front panel of my VI. Can this happen?

[Silver_Shaper]

Dear brjohns

However this is not programmability possible with normal lenses of the camera, there are certain lenses available in the market with motorized zoom and focus. You can do with this.

[brjohns]

Hi Sazi,

Thank you for the response. I do believe my camera has motorized focus, because there is a focus slider bar included within the software that came with the camera. This is what makes me believe that I could potentially program this into Labview. The problem is that I have no idea how to go about this.

If this cannot be achieved, I guess I will have to try and "trick" the camera into focusing how I want it to.

[BlueCheese]

Many USB webcameras with internal lenses have a built-in focus that can be accessed programatically. Moreover, DirectShow has a specific interface for this that IMAQdx supports. It would be up to the camera vendor to ensure that they have implemented the proper DirectShow interface for this to be accessible via IMAQdx.

Eric

[brjohns]

Thanks Eric! I will look into this and post what I find out.

[nhoang]

hi brjohns,

I got the same problem as yours. My USB camera has a resolution of 1024x768. I tried with NI-IMAQdx (Labview 2010) but I could not get the full resolution.

Could you show your solution in detail?

Thanks in advance!

nhoang.

[brjohns]

I have attached my camera VI file. Hope this helps.

[nhoang]

thank brjohns,

I have tried your program with my USB camera, but the problem still exists.

the reason may be the camera driver. It is not fully compliant with Direct Show.