unstable frame rate

[lty52]

I installed 32bit windows xp and 64bit windows 7 same computer.  I run acqusition software on 64bit windows 7 computer. I have problem with unstable frame rate and little bit slow, but if I run on 32bit windows xp OS, there is no problem.

Other software settings are same. But, on 32 bit, frame rate is stable but, on 64 bit, it is not.

Please let me know if you guys have some solution.

Sincerely,

Taiyoon Lee

[MilanR]

Hi Taiyoon,

Can you clarify what your system set-up is? By frame rate are you referring to usage of the NI-Vision software / IMAQ? What is the hardware that you are collecting data on?

[lty52]

Yes. I used IMAQ. The camera name is two of HAMA ORCA ER and two of HAMA C8484 cameras.

I installed 32bit xp and 64bit windows 7 OS exact same computer. I use dual OS right now.

This computer is Inter Core i7-2600 CPU @ 3.4GHz, 3.5GHz, 3.48 GB of RAM on 32bit, Inter Core i7-2600 CPU @ 3.4GHz, 3.4GHz, 8 GB of RAM on 32bit on 64 bit.

Sincerely,

Taiyoon Lee

[Ben-N]

Hi Taiyoon,

I have a couple more questions for you.  First, are you using IMAQ or our IMAQdx driver?  Also, what development environment are you using?  Are you using LabVIEW, Vision Assistant, or something else?  Are you using the same software version on both?  If you are running LabVIEW, is the 64 bit version running a 64 bit version of LabVIEW, or are you running on the 32 bit layer?  What versions of software are you running?

You also mentioned that you are having problems with unstable frame rates.  What exactly do you mean?  Are you missing frames, are you getting bad images, or what exactly are you seeing?  Further, you mentioned that you have both OS's on one computer.  Are they on the same hard drive?  Are the partitions of similar size--is one much larger than the other?

I was able to find some documentation on not acquiring at the expecte frame rate.  The following document should shed some light on the issue you are seeing: KnowledgeBase 3H49K1L6: Why Am I Not Acquiring Images at the Expected Frame Rate of My Camera?

[lty52]

First,I am using IMAQ and IMAQdx both of them. And, I am using LabWindows 2010 CVI. I think this is 32bit becuase I heard that LabWindows 2010 CVI is only 32bit.

So, I make 32bit application with LabWindows 2010 CVI and use this application on the 64bit computer.

Unstable frame rates is some frame is similar to exposure time but a few frames are 2~3 times more than the exposure time.

In addition, general frame rate is too higher than exposure time. But, there is no missing frame. I am not sure about the image qulity but, I think it's fine.

Yes. It is same hard drive and has partition of similar size.

Sincerely,

Taiyoon Lee