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INDI Library v1.9.7 Released (29 Jul 2022)

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

measure of the background

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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.
1 month 3 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
1 month 3 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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1 month 3 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: 1 month 3 weeks ago by MORELLI.
1 month 3 weeks ago #83720

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Ok, Im going with a tooltip which shows sigma and median.
1 month 3 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.
3 weeks 6 days ago #84459

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I'd assume that would be simple to add, if enough people want it. It's not really what you'd expect from a 'background tool' though. But peak intensity you do already get from the '3D / star' tool.

What I find more irritating is something that isn't the fault of the BG tool, but rather the (IMO) non-intuitive way of handling zoom in the FITS viewer. If you use a relatively small square on a large image, the box is both hard to see and to grab/position nicely. Most of the time some refinement is needed, but using the scroll wheel has a 80% chance to kick the selection area out of the FOV.

The 'proper' fix would likely be to fix zoom so it zooms centered on the pixel under the mouse pointer. A (maybe?) easier one could be to have a shortcut (SHIFT-click?) to position the selection box at the current mouse coordinates.
openSUSE Tumbleweed KStars git INDI git
GPDX+EQMOD, CEM60EC, ASI2600/1600/290mini+EFW+EAF
3 weeks 6 days ago #84463

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Replied by MORELLI on topic measure of the background

Hello Rafa,

It is an interisting feature about exoplanets and I am concerned too. I am going to start in august with my setup.
I am OK about modification of exposure along the session. But can we change it easily during a sequence?
iOptron GM28 - ED80 SW - MAK180 SW - ASI183MM PRO -QHY224C - RPI4 4Go + Stellarmate/Nafabox/Astroberry - Focus motor DIY
3 weeks 6 days ago #84464

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We are not changing the exposure on a sequence. We keep the same exposure during the transit. So it's important to be aware of the starting point and the variation on air mass during the session.

Regarding the 3D / star tool.... it's a pretty tool almost unusable to analyse stars on smaller computers (like a raspbery pi). To look for saturation, you only need the peak value. If you want to show a graph, It will be infinitely more useful a simple 2D cut through the centroid of the brighter star inside the selected region. This will be easier to interpret that a full 3D graph that you need to rotate: you will see immediately if you have reached the saturation point (star profile flattened on top) of ir the maximum is only a hot pixel and you still have room for more exposure.
Last edit: 3 weeks 6 days ago by Rafa Barberá.
3 weeks 6 days ago #84467

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Replied by MORELLI on topic measure of the background

Thank you everybody for this work now in v3.6.0!
iOptron GM28 - ED80 SW - MAK180 SW - ASI183MM PRO -QHY224C - RPI4 4Go + Stellarmate/Nafabox/Astroberry - Focus motor DIY
2 weeks 10 hours ago #84838

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Madhav, thank you for your work on this new Stats tool. I've already found it useful. I would like to see min and max included. Thank you.
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2 weeks 5 hours ago #84854

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Replied by MORELLI on topic measure of the background

Did the SHIFT and mouse drag is operating ? Not in my case.
iOptron GM28 - ED80 SW - MAK180 SW - ASI183MM PRO -QHY224C - RPI4 4Go + Stellarmate/Nafabox/Astroberry - Focus motor DIY
2 weeks 5 hours ago #84858

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