How to determine the accuracy of the frame rate using a Basler sca640-70gm?

To whom it may concern
I am guessing that the time between each frame varies from a nominal set frame rate.
How do I set that nominal frame rate?
How do I determine what the actual (frame by frame) frame rate or time between frames was in post pressing of the "video" image.
Thank you,
Todd
Solved!
Go to Solution.

It is almost impossible to measure the frame rate accurately by measuring the time between consecutive frames. The latency of sending the images over the ethernet means they won't arrive at the computer with the same exact spacing they were taken at. Also, measuring the length of one short interval in LabVIEW is also very difficult. Windows latencies and other issues could make your measurement be off by quite a bit.
The only way I can see to verify the frame rate is to use a digital input into a counter and wire the shutter signal directly from the camera into the digital input. You could program the counter to measure between the rising edges of the shutter signal, and you would find out the frame rate is indeed very accurate and repeatable.
The only other way I know to accurately measure the frame rate in LabVIEW is to measure the time over a large number of frames (thousands) and divide the number of frames by the total time. Any minor errors in measuring the timing of a single frame go away with the large number of frames.
Bruce
Bruce Ammons
Ammons Engineering

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