what is the maximum frame rate that can be taken with a IMAQ card? Also what is the limiting factor when processing live video, the card or the algorithm?

[BruceAmmons]

The maximum frame rate depends on the card you are using. The old 1408 could only capture 30 frames per second. The new 1409 can capture 60 frames per second. The digital cards, the 1422 and 1424, can capture data at 20 MHz and 40 MHz respectively. The actual frame rate with these cards depends on the camera, which determines the image size and bit depth.

The limiting factor is probably going to be your algorithm. If it is a simple algorithm, such as measuring a couple of dimensions, it should keep up with the video rate. More complicated algorithms take longer than the video rate, so you can only examine every second or third image (or more).

Bruce

[Stuart B]

Thanks for that, I need fram rate of at least 200fps, do you know of a camera that will acheive this and isn't mega bucks.

[BruceAmmons]

For a frame rate of 200 fps, you are going to need a digital camera. I don't know all the cameras available well enough to estimate a price. It will also depend on the resolution you need.

I would talk to Robert Eastlund at Graftek (800) 441-2118 and discuss your project with him. He will be able to help you pick out a camera and all the hardware you need with it.

Bruce