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INDI Library v2.0.6 is Released (02 Feb 2024)

Bi-monthly release with minor bug fixes and improvements

Automatic ADU bug ?/DarkFlat - Flat counter bug

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Replied by Nick Birkett on topic Automatic ADU bug ?

Hi Euripides, yes that's correct. When creating a set of Flat jobs in the Camera tab, click on "Calibration". In the flat duration use the ADU and set the desired ADU (I use 25000). Then set the exposures for each flat to 1sec and take the flats. It will take a series of test exposures until it gets
the correct one (according to your ADU) and then it commences taking the Flats at this new exposure. Note once all the exposures have been
been done the exact exposure time can then be seen in the Exposure box. If you want to then create DarkFlat just double click on each sequence
and change "Light" to "Dark" and click the tick box in sequence queue. You will then have a Dark sequence using the exact same exposure as the light.
This is useful if you have a set of filters to go through.
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2 years 2 months ago #79559

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Replied by Nick Birkett on topic Automatic ADU bug ?

I meant change "Flat" to "Dark" !!
2 years 2 months ago #79560

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Replied by Euripides on topic Automatic ADU bug ?

Ok I think I got it. One last question if you don't mind : "Desired ADU". How do you end up with that value?

My camera is 14 bit so my true ADU is 16000. 

Thanks!
2 years 2 months ago #79563

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Replied by Nick Birkett on topic Automatic ADU bug ?

Ekos scales the ADUs to 16bits , so works same for all cameras. Indi "ADU" is not the one the manufacturer gives.
2 years 2 months ago #79564

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Replied by Nick Birkett on topic Automatic ADU bug ?

Check out the "Bits per Pixel" value in your FITS header. Mine shows 16bits - QHY294M and ASI294MC even though both are "14bit" cameras.
2 years 2 months ago #79565

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Replied by Euripides on topic Automatic ADU bug ?

I bet that mine will be 16bit too, cause as far as I can see those values are "stretched" to 16bit.

The point is how we proceed with that? Do we go with the max value for 16 bit? The max value for 14 bit (the actual true value)? Do we have to put the 30%, 50% of the max value in that field?
2 years 2 months ago #79566

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Replied by Nick Birkett on topic Automatic ADU bug ?

Yes just proceed as if you have a 16 bit camera. It is just a constant scaling so the ADU setting can be the same for any camera (12, 14, 16 bit) all
treated the same by indi.
I use 25000 which is 38% of 2^16 . I think 25-50% is often quoted.
If you run your mouse over an image in FITS viewer, in the bottom right corner you will also see the coordinate (pixels) and value (0-2^16-1).
Also in FITS viewer click the "Statistics" button (3 bars looks like a histogram) and it will show you min, max, mean and median values of the image.
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2 years 2 months ago #79567

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Hi Jasem. Just tested the new DarkFlat feature. I like it. Take the flats then press "Generate DakrFlats" button to get a new set of jobs.
Ok there is bug. When I take the flats it doesn't update the frame counter so I just end up with 1 Flat for each filter. DarKflats ae fine.
Great work.
2 years 2 months ago #79673

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I can't replicate the flats issue. If I specify 5 flats, I end up with 5 as usual.
2 years 2 months ago #79674

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I just updated to 3.5.7 stable. I got 1 frame in each case for 2 filters. DarkFlats fine. I'll reboot and retry.
Ubuntu focal fossa: PI server, Intel client:

2022-01-20T08:08:46 Received image 5 out of 5.
2022-01-20T08:08:43 Capturing 1.570-second image...
2022-01-20T08:08:42 Captured /export/home/nick/EKOS/TEST/Flat/Luminance/Flat_1.570_secs_001.fits
2022-01-20T08:08:42 Received image 4 out of 5.
2022-01-20T08:08:39 Capturing 1.570-second image...
2022-01-20T08:08:38 Captured /export/home/nick/EKOS/TEST/Flat/Luminance/Flat_1.570_secs_001.fits
2022-01-20T08:08:38 Received image 3 out of 5.
2022-01-20T08:08:35 Capturing 1.570-second image...
2022-01-20T08:08:34 Captured /export/home/nick/EKOS/TEST/Flat/Luminance/Flat_1.570_secs_001.fits
2022-01-20T08:08:34 Received image 2 out of 5.
2022-01-20T08:08:31 Capturing 1.570-second image...
2022-01-20T08:08:31 Captured /export/home/nick/EKOS/TEST/Flat/Luminance/Flat_1.570_secs_001.fits
2022-01-20T08:08:31 Received image 1 out of 5.
2022-01-20T08:08:27 Capturing 1.570-second image...
2 years 2 months ago #79676

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Strange. Perhaps something wrong at my end ?
Restarted server (arm64) and client (x86_64). Both Ubuntu focal fossa with latest updates. Kstars 3.5.7. Same results:
ls EKOS/TEST/Flat/Luminance/
Flat_0.660_secs_001.fits

2022-01-20T09:19:57 Captured /export/home/nick/EKOS/TEST/Flat/Luminance/Flat_0.660_secs_001.fits
2022-01-20T09:19:57 Received image 5 out of 5.
2022-01-20T09:19:55 Capturing 0.660-second image...
2022-01-20T09:19:54 Captured /export/home/nick/EKOS/TEST/Flat/Luminance/Flat_0.660_secs_001.fits
2022-01-20T09:19:54 Received image 4 out of 5.
2022-01-20T09:19:52 Capturing 0.660-second image...
2022-01-20T09:19:51 Captured /export/home/nick/EKOS/TEST/Flat/Luminance/Flat_0.660_secs_001.fits
2022-01-20T09:19:51 Received image 3 out of 5.
2022-01-20T09:19:49 Capturing 0.660-second image...
2022-01-20T09:19:48 Captured /export/home/nick/EKOS/TEST/Flat/Luminance/Flat_0.660_secs_001.fits
2022-01-20T09:19:48 Received image 2 out of 5.
2022-01-20T09:19:46 Capturing 0.660-second image...
2022-01-20T09:19:45 Captured /export/home/nick/EKOS/TEST/Flat/Luminance/Flat_0.660_secs_001.fits
2022-01-20T09:19:45 Received image 1 out of 5.
2022-01-20T09:19:43 Capturing 0.660-second image...
2022-01-20T09:19:42 Current ADU 24963 within target ADU tolerance range.
2022-01-20T09:19:39 Capturing 0.660-second image...
2022-01-20T09:19:39 Current ADU is 28257 Next exposure is 0.660202 seconds.
2022-01-20T09:19:36 Capturing 0.750-second image...
2022-01-20T09:19:34 Current ADU is 37324 Next exposure is 0.750000 seconds.
2022-01-20T09:19:31 Capturing 1.000-second image...
2022-01-20T09:19:28 Job requires 1.000-second images, has 0/5 frames captured and will be processed.
2022-01-20T09:18:42 Cooler is off
2 years 2 months ago #79677

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I can confirm the issue if only DURATION is selected. Try to select "Filter" checkbox while I investigate the issue.
2 years 2 months ago #79678

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