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Author Topic: Today's stupid question - ADU's...  (Read 2670 times)

Offline Phil Leigh

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Today's stupid question - ADU's...
« on: 2013 November 05 07:16:23 »
How do I measure the ADU value of my flats in Pi? - I'm guessing I use Image Statistics, but of course this isn't calibrated in "ADU"'s...

All advice gratefully received
thanks
Phil
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Offline Carlos Milovic

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Re: Today's stupid question - ADU's...
« Reply #1 on: 2013 November 05 08:25:13 »
ADUs are just counts in the 16bit range. This means, you have to translate the normalized range (0 to 1) to 0 - (2^16)-1. You don't have to do this manually. You can change the readout options, and also the range in the statistics.
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Regards,

Carlos Milovic F.
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Offline Phil Leigh

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Re: Today's stupid question - ADU's...
« Reply #2 on: 2013 November 05 08:44:06 »
Thanks Carlos - so If I have a 14-bit camera do I use the 14-bit range?
thanks
Phil
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Offline Carlos Milovic

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Re: Today's stupid question - ADU's...
« Reply #3 on: 2013 November 05 08:54:28 »
No, it is always measured in the 16bit range. Depending on the ADC, gain, and file format, you may end with values in 0 to 65536/4-1 or use the full range, but with spaces.
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Carlos Milovic F.
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