Slower frame rate than expected in acquisiton using cameralink

[Omer]

Hello,

I'm using NI 1427 cameralink card to acquire and save images with CCAM cmos camera.

Using ROI I can increase the camera frame rate up to hunderds frames per second (FPS).

When I use the IMAQ sequence.vi to acquire a sequence of frames, the resulted FPS is much less than expected (i.e. 230 instead of 370). I'm using a flat sequnce structure with 2 clocks to estimate the acquired FPS.

When openning the camera in MAX I checked that indeed the camera works at the high FPS.

I'm working on PC with AMD Athlon64 x2 Dual 3800+, windows xp pro, 1Gb RAM, Labview7.1.1, vision acq. software 8.2.1

Can anyone spot the problem?

thanks

Omer

[Luke H]

Omer,

I can't see anything readily from what you just described.  Can you post the code so that we can see if it is something in software that is causing the slowdown?

Thanks,
Luke H

[Omer]

Hi Luke, thank you for your response.

I attached the sub-vi I'm using.

Thanks,

Omer

[Jasper S]

Omer,

Another discussion thread is open discussing this issue on the Machine Vision forum.  A link can be found here.