topic Re: pixel decimation with PXI-1408 in LabVIEW

pixel decimation with PXI-1408

zomer — Thu, 29 Nov 2001 09:19:00 GMT

I'd like to reduce the number of pixel during the acquisition of a CCD (CCIR type) image using my PXI-1408 board. Although this is mentioned in the catalogue ('pixel decimation') i cannot find the wright vi to do it. Could you explain me how to do it ?
It is also mention that i can programme the gain of teh input video signal but i cannot see how ?

Re: pixel decimation with PXI-1408

cld — Thu, 29 Nov 2001 23:39:16 GMT

If you want to change the configuration settings programatically, you can use a property node from the Image Acquisition Palette. Input the session id from you IMAQ Session, select what you want to change in the property node, and set the values. The same can be done for the gain settings. I hope this helps!
Best Regards,
Chris Drymalla
NI Applications Engineer

Re: pixel decimation with PXI-1408

zomer — Fri, 30 Nov 2001 15:40:43 GMT

Thanks, do you have an example (it's still hard to find what format to use with the Property-Node )?

Re: pixel decimation with PXI-1408

cld — Fri, 30 Nov 2001 20:25:31 GMT

I have attached a quick grab example with a property node...you can try using the different available properties to get what you want!
Good Luck
Chris D
NI Applications Engineer

Re: pixel decimation with PXI-1408

BruceAmmons — Mon, 03 Dec 2001 16:10:04 GMT

Zomer,

First figure out how to do what you want using MAX. For the two items you mentioned, I believe you want to change the scale (for pixel decimation) and Reference Levels (for gain). They are both on the Basic page of the properties for your camera.

Once you know which properties you want to change, you can change them in your program using a property node.

Bruce