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Improving panoramas when single photos are not properly aligned

Fabrizio Giudici (stoppingdown)
  • Edited

Sometimes I found myself stitching panorama photos taken with an extreme wideangle (e.g. vertical 10mm on APS-C) and not working at the best hand-holding; the result is that the stitched photo has vertical lines tilted to the right and the left in various parts, that cannot be fixed with the keystone tool. For instance, look at the right picture below: the building at the center of the image is tilting to the left; the door at the left border is tilting to the right  (ignore the building at the very left border as it has a slanted wall on its own, being an ancient castle); the building at the right border is tilting to the right again — the right-left-right tilt sequence can't be fixed.

So today I tried to pre-apply the auto keystone to the pano element photos before stitching: there was no change, I suppose that the panorama algorithm works on the unprocessed original images. Then I tried a different approach: I exported all the keystoned pano elements to DNG and then created the panorama out of them — and I got the left picture, which is much better and could be keystoned with no problems.

Does somebody else use this trick? Do you think it would be valuable if C1 added an option to pre-keystone the pano elements before creating a panorama?

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Comments

5 comments

Date Votes
  • Walter Rowe
    Moderator
    • Edited
    Top Commenter

    Capture One uses the raw files for pano and HDR stitching so no keystone adjustments you apply to the raw files will be included in the HDR merge or pano stitch. The output of these processes is a linear RGB file in DNG format.

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  • Fabrizio Giudici (stoppingdown)

    Really disappointing that C1 is not interested in developing pano or HDR...

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  • Fabrizio Giudici (stoppingdown)

    I'm not really sure that pre-applying keystone adjustments would always work in the panorama mode stitching process. I can image some quite severe issues trying to achieve alignment in some situations. 

    It doesn't always work; I have a similar file that doesn't get any improvement, probably because pano elements are too badly slanted.

    I'm going to file a feature request.

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  • Fabrizio Giudici (stoppingdown)

    Done: https://captureone.ideas.aha.io/ideas/FR-I-1385

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  • Fabrizio Giudici (stoppingdown)

    I'm guessing whether it can be done with scripting.

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