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INDI Library v1.9.8 Released (29 Sep 2022)

Bi-monthly INDI Library released with new drivers and bug fixes.

measure of the background

  • Posts: 4
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https://imgur.com/a/uLCc7Fw This is how it currently looks, Iv also added custom probe zones and a few pre defined ones. Have to work on a few UI stuff
The following user(s) said Thank You: Jasem Mutlaq
4 months 2 weeks ago #83021

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Great job Madhav! Looking forward to the final version.
Jasem Mutlaq
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4 months 1 week ago #83028

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Replied by MORELLI on topic measure of the background

Hello,

Very happy that this idea will be finally included into EKOS. Joined, an example with Siril, the french software DSO image processing.
iOptron GM28 - ED80 SW - MAK180 SW - ASI183MM PRO -QHY224C - RPI4 4Go + Stellarmate/Nafabox/Astroberry - Focus motor DIY
4 months 1 week ago #83038
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Replied by MORELLI on topic measure of the background

One more thing: it would be avalaible to zoom the image before drawing the box.
Can we hope to see integration into v5.6.0 ?
iOptron GM28 - ED80 SW - MAK180 SW - ASI183MM PRO -QHY224C - RPI4 4Go + Stellarmate/Nafabox/Astroberry - Focus motor DIY
Last edit: 3 months 3 weeks ago by MORELLI.
3 months 3 weeks ago #83454

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I think that the median will be the good estimator for the background. This way, if some faint stars are included into the box, they will be ignored. You can add also the average (mean), but it will be more influenced by residual stars
3 months 3 weeks ago #83455

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Replied by MORELLI on topic measure of the background

No need. The draw box intends to select an area of the background without stars.
I am not good at formula but the 3 sigma rules is well know by the astronomers. No need to change it.
iOptron GM28 - ED80 SW - MAK180 SW - ASI183MM PRO -QHY224C - RPI4 4Go + Stellarmate/Nafabox/Astroberry - Focus motor DIY
3 months 3 weeks ago #83466

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Sorry I wasn't able to find time lately. Let me know whether I should output the details in

1. an overlay on top of the image itself ( although limited number of stats, like Width x Height, sigma as this looks messy )
2. a new floating window with the same stats table (similar experience as in Siril )
3. the existing stats panel itself (which alternates between full image stats to selection stats depending on a button )

Attached Image shows how it would look in option 3.
3 months 2 weeks ago #83710
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Replied by MORELLI on topic measure of the background

Hello,

Once the area has been drawn, right-click on it to bring up a menu in which you will find "Statistics". This menu opens a window with the results: minimum, maximum, average, median, sigma. Using the standard panel may be confusing. So you need to display the results concern only the plotted area.

There may be other entries than Statitics, if necessary, for others functions.

Thank you for your work.
iOptron GM28 - ED80 SW - MAK180 SW - ASI183MM PRO -QHY224C - RPI4 4Go + Stellarmate/Nafabox/Astroberry - Focus motor DIY
3 months 2 weeks ago #83718

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Ad 1: Guess WxH isn't really needed, as one can see (guesstimate) the size? Median and sigma would be the important numbers (for me).
Ad 2: [-] for that, if it's a full window. Or could it be tooltip-like if the mouse pointer is over the area, and close by itself when moving the pointer away?
Ad 3: So then the stats in the tabs refer to only the highlighted area, yes? I don't see a sigma in the images...

Will definitely be a great addition!
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3 months 2 weeks ago #83719

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Replied by MORELLI on topic measure of the background

OK for Ad1
OK for Ad2
So Ad3 is not needed.
iOptron GM28 - ED80 SW - MAK180 SW - ASI183MM PRO -QHY224C - RPI4 4Go + Stellarmate/Nafabox/Astroberry - Focus motor DIY
Last edit: 3 months 2 weeks ago by MORELLI.
3 months 2 weeks ago #83720

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Ok, Im going with a tooltip which shows sigma and median.
3 months 2 weeks ago #83732

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After playing around with this option on a recent nightly, I think that we have missed the opportunity to create a more versatile tool. Yes, I know that Morelli don't need it because he is only concerned about backgrounds, but the full statistics (min / max / average... etc) will be very useful for other use cases.

For example, we observe a lot of exoplanet light curves. Those events are many hours long, so the atmospheric extinction is an issue: if you start observing when the star is low and then it climbs to almost the zenith during the event, you need to now the exposure values to start with. On those situation it will be very useful to know the max value on a little box around the observed star at the beginning of the session. This way we can adjust our exposure to ensure that it will not saturate on the rest of the night.
2 months 2 weeks ago #84459

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