Capturing from a Ricoh Theta (360 image) fails

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    Wishgranter
    Hi breravin

    1. i see a WHITE walls without any "features" that could be used in alignment

    2. img looks a bit noisy even here in web view.

    3. can try capture it in "photogrammetry friendly" environment ?
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    breravin
    This was just an example image which had nice clean lines for distortion comparison. My real capture has a lot more information (but it is potentially sensitive, so I cannot post it here).

    It includes a desk, computer, keyboard, monitor, chair, boxes, and cabinets. I also have alignment markers placed all around the room. Still, nothing generates in Reality Capture.

    This is a fairly straightforward 3m x 2.5m space that I'm looking to recreate. It's not particularly "unfriendly" to photogrammetry.

    Even with the lower quality images, I would expect there to be a lot more alignment.
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    Ben Kreunen
    From what I've seen of the camera you're going to be pushing it a bit in terms of image quality. Probably not helped by reprojecting the stitched image to cube faces. If you can get the raw image from each lens that should work better. Just paint over the tripod with white. Either way I'd consider using a different camera.

    For a 20mp circular fisheye image I find the mesh gets noisy after 2m. While you can clearly see further than that, the image resolution beyond that distance isn't very useful for photogrammetry. Try and think of an effective image circle of 120° per lens and a max working distance of 1m when considering camera positions and you should get enough overlap... and use 3 different camera heights.

    Changing the sequence of images may also help... Sort the images so that they get listed by face and rename them eg. left01, left02... right01, right02... etc or if you're using the raw image from each lens,split them into front and back sequences.
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    breravin
    Thanks Ben, good thoughts. Somewhat confirming my suspicions a bit. I'm "glad" both of you feel it's a quality issue (and not a "distortion" issue). That at least gives me something to go on.

    Regarding using the raw image - do you mean the actual 360 image? Will RC actually handle that? I haven't tried that myself, but I will try on Monday when I'm back in the office.
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    Ben Kreunen
    Definitely not the 360° image. This has been stitched and there is some parallax between the two source images. Can you get the images from each lens separately?
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    breravin
    I'm not sure on the Ricoh Theta - I'll look into it!
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