Member Discussion
Camera Testing Procedures
I am in the process of building an internal VMS / Camera testing procedure for project closeout purposes. I could use some suggestions from the ‘cloud-source’ of information…that is IPVM.
So to get this discussion kicked off – I have been thinking of defining or segmenting the testing procedures into ‘Cameras’ ‘Software’ ‘Servers’ ‘Network’ or something in this neighborhood.
Base line recommendations?
"I state that using a 2Mp camera with a defined focal length SHOULD give me my Px/ft ratio at the distance provided by the design software."
I am not sure if you need to do field testing for that, only because it's a straightforward math problem (i.e., if you know the horizontal pixel count and the FoV width, the ppf/ppm is a direct output).
However, what is interesting / important is what the real quality is (i.e., you have a spot - say doorway - where you know that the ppf is 50, but the real visible quality could vary significantly depending on other factors).
I would suspect that most integrators simply measure visibly - i.e., customer looks at image with a test subject (often one of the field techs or their car), if the video looks good enough to the user / manager's eye, it is accepted.
Thanks John - that is a decent starting point. So I have included testing bitrate, framerate and quantization using AVInaptic.
I also plan on including the metrics defined in my design software to qualify image quality using a snellen chart. For example - in my design, I state that using a 2Mp camera with a defined focal length SHOULD give me my Px/ft ratio at the distance provided by the design software. Proof of concept / design?
Are there any other integrators going through this level of final procedure testing?
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