Hugin: Stitching area darker, vignetting issue

[SEMPERVIVUM1412]

Hi, dear Hugin users!
I'm new to Hugin. Previously was happy with PTGUI but currently I need batch processing and PTGui's price for a pro version is too high, therefore I switched to Hugin.
Works fine so far. I had to change the standard blender to the built in one, when I used Enblend I got stitching errors.

However there is one issue: Around the lines where the images are stitched there is a darker region. Caused by vignetting of the lenses? How can I fix this?

I attached the project file I used as a template for my batch stitching. If required I can provide sample images.

Another issue, I'm not sure if there is a relation to the one above: The preview window is looking weird, see attached screenshot.

[SEMPERVIVUM1412]

PS, I forgot: My camera is an Insta360 X3.

[T. Modes]

ulrich....@posteo.de schrieb am Mittwoch, 16. Oktober 2024 um 21:47:57 UTC+2:

However there is one issue: Around the lines where the images are stitched there is a darker region. Caused by vignetting of the lenses? How can I fix this?

I attached the project file I used as a template for my batch stitching. If required I can provide sample images.

Another issue, I'm not sure if there is a relation to the one above: The preview window is looking weird, see attached screenshot.

A fisheye with a field of view of 220 deg looks "fishy". A fisheye should have a hfov < 180 deg. (Except there is essential black border in the images.)

Maybe another lens projection works better for your cam/lens.  But without suitable images it's difficult to say.

Thomas

[wirz]

On 17/10/2024 18:39, 'T. Modes' via hugin and other free panoramic

I'd say the preview is compatible with a fisheye that projects only a
smaller circular image onto a rectangular frame and therefore requires a
circular crop. Maybe you omitted that step. Vignetting shouldn't be an
issue -- hugin compensates that.
What enblend issues did you see?

Lukas

[SEMPERVIVUM1412]

Thanks for the responses so far.

This is the resulting time lapse video:

https://ulrichbangert.de/div/hugin/export_ahq12.mp4

The dark region or ribbon is clearly visible from 11 o' clock to 5 o' clock. Unfortunately it's not static, if it was it would be easy to remove it by use of a gradient in Affinity Photo.

ZIP file containing images and project files:

ulrichbangert.de/div/hugin/2024-10-10_Polarlichter_Uehrde_Tiny_Planet.zip

The pto file with the long name is the template, panorama0.pto is one of the project files created by PTBatcherGUI.

Hope this will help to locate the reason of this issue.

[T. Modes]

ulrich....@posteo.de schrieb am Freitag, 18. Oktober 2024 um 12:11:08 UTC+2:

Hope this will help to locate the reason of this issue.

The image circle does not cover the whole image rectangle. You need to crop away the black corners. On the mask tab, select sub tab crop and adjust circular crop.Maybe you need to experiment how much of the border you need to crop away - the border pixel are probably influenced by some kind of vignetting.