Just for fun, here's my first panorama from the 2023 beta

[Jeff “weltyj” Welty]

https://postimg.cc/ygYShW3h

All my panoramas are handheld.   I rotate the camera to portrait mode and try best I can to pivot around the nodal point while getting about 50% overlap and holding the camera fixed in front of me like it's on a tripod.  This is shot with my canon g1xm3.  11 total images, about a 208 degree field of view.

For the curious on the left is Mount Rainier in Washington State, USA.  A little right of center is Mount Saint Helens, and if you know where to look Mount Adams.  It was, as we like to say, a three volcanoe day.

Cheers,

Jeff

[Jeff “weltyj” Welty]

p.s.  The sky wasn't complete so I used my skyfill application to fill it out...

[Rod Bibeau]

This is excellent.

Skyfill has been on my list to get working on my drone panos...looks like I need to add the new beta to my todo list also.

Thank you for the example photo! 

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[Jeff “weltyj” Welty]

Thanks!

Hopefully skyfill will "just work", i.e, "skyfile file.tif file_with_sky_filled.tif"  which would be the case if you have sharp contrast between the sky and whatever is on the horizon.   If not take a look at the tutorials.  I'd also appreciate feedback on the tutorials if you think they can be improved.

https://github.com/weltyj/SkyFill/

[Rod Bibeau]

Oh man. I want to incorporate that into my drone pano script but the issue I have is I am not a programmer and getting it to compile on windows left me stumped. I will try it again in the next few days and let ya know what/where I get stuck. My panos have a very sharp contrast. Like this - https://maps.app.goo.gl/6d2nJiieKm6tjV6c8?g_st=ic

By chance, do you have a compiled win version of skyfill? 

Sent from my mobile

On Oct 19, 2023, at 21:46, Jeff “weltyj” Welty <eljef...@gmail.com> wrote:



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[Jeff “weltyj” Welty]

I'm no help at all on windows, linux only.   Your example is going to have problems because it's not a clear blue sky  (skyfill fills blue sky, it will get hopelessly lost with clouds).

Thanks for that though, I need to update the git readme so users understand the distinction between sky and clouds.

[Rod Bibeau]

No worries.  I will give it a shot on windows again.  There are some possible hints with the linux subsystem for windows I found and will try.  If not, I will spin up a VM of Ubuntu or some other distro and use that to adjust/test my script and skyfill with. 

Here is the past thread where I was asking about this and was pointed to Skyfill - https://groups.google.com/g/hugin-ptx/c/ivVtUvGwaaQ

Also - Here are some example files to show my process - Pano-BlackHole- this one has mostly cloud-free skys. 

As for the blue sky, I have a few thousand Drone 360 Panos....some surely have clear sky.  Here is an example from Yesterday that has mostly blue sky - https://maps.app.goo.gl/zAZVz8gpB5FEoMr5A

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[Jeff “weltyj” Welty]

Looks like you only have jpeg files and not raw files?   The problem with jpeg files is artifacts from jpeg compression make it nearly impossible to detect where the sky ends and the horizon begins.  The skyfill app is expecting very smooth color transitions from one small group of pixels to the next as it works its way down to the horizon.   When it sees a large enough change in color over a given threshold, it flags that spot as "end of sky".

Given what you have shown here, I suggest you go directly to the tutorial.   Read the first and second parts (first part is pretty quick).   Full sky replacement mode is the second part, and in that mode skyfill gives every pixel a probability of being sky.   When it replaces pixel colors it will use that probability to determine how much of the pixel's color to change toward the modelled sky color at that location.  You create a text file that tells sky fill how far "down" to proceed re-coloring pixels.   The text file just lists line segments in image coordinates.

*You have to be careful and make sure skyfill is not using non-sky areas like clouds or water for sample points to create the sky color model* -- skyfill will make some attempt to throw out bad sample points but it can only do that if the bad points are the exceptional cases.   Running skyfill with the "-d3" flag is your friend here.