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I shoot 360 photos with a 360 camera that takes the entire scene with two wide-angle lenses that are stitched together to obtain 360 panoramas. I use Rawtherapee for post-processing and colour correction. Unfortunately, I don't have the original fisheye photos anymore.

The scene is stitched flawlessly by specific software for my 360 camera. The problem is that RawTherapee doesn't account for the image wrapping around from the left edge to the right edge, even when there is the proper EXIF information for the 360 photo projection type. Every time I use settings that act "locally" within the photo (Shadows/Highlights, Local contrast, anything that involves a "radius" of action), it results in a colour discontinuity.

To overcome this, I use GIMP to enlarge the photo by 'x' cells on both sides (and above) by pasting part of the photo which is connected (on a 360 perspective) for each side. This allows me to use those Rawtherapee's settings without concerns, but it takes longer to post-process photos this way.

Is there a tool/software/workaround to solve this problem in a more time-efficient way?

discontinuity

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  • I have never run into that type of issue editing equirectangulars in Lightroom or Photoshop. Does the same thing happen if you use the Gimp or darktable?
    – inkista
    Jun 14 at 1:54
  • @inkista I've never tried to post-process 360 photos with Gimp, but I should give a shot with DarkTable. I've heard that Photoshop has a "spherical mode" which allows to edit a photo in a 360 environment, but I wonder if it is a proper software to post-process photos like Lightroom or Rawtherapee
    – NorthSon
    Jun 14 at 20:29
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To me, this looks a lot like RawTherapee is introducing the issue. I've never had any "seam" like this editing equirectangulars in Photoshop or Lightroom. I suspect using the Gimp to do your image adjustments might also avoid the seam.

I don't think it's a matter of doing local/radius edits throwing off the matching, because the seam is thin and uniform and across the entire image.

Maybe don't use RawTherapee. I just took your original panorama, processed it to be neon-bright-saturated in darktable with a Curves adjustment and some color shifting, exported it, created a QTVR file out of it, and it did not exhibit the edge seam you show.

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  • OP specifically said the problem appears with tools acting locally so I guess global adjustments using curves probably does not break equirectangulars in rawtherapee?
    – szulat
    Jun 16 at 16:08
  • @szulat, except Shadows/Highlights isn't a local adjustment, and if it were just an area that happened to hit the seam, it would be more like a blob or a larger area affected, not just the border on one side of the image in a thin strip of only a few pixels like that.
    – inkista
    Jun 16 at 23:11

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