>> If LED's are not continuously on (some sort of pwm or
>> case-dependent-operation or LED's lid up individually for individual
>> cases) taking snapshot of the led's won't work you need to capture
>> lots of jpegs in time domain (movie) to compare results.
>
> Yup.

Or integrate over a period > maximum off period.

Adding an LED coloured filter will help contrast.


       Russell
--=20
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