Imaging Working Group

  • 1.  Comparing 3D Models

    Posted 03-09-2023 12:04

    Hi IWG -

    I am working on a project which requires comparing a number of 3D models of similar objects. I am currently using CloudCompare, but interested in any suggestions for other (ideally open source) options that will work on a Mac. I am also keen to talk to others who have carried our similar projects. (If you have, and you're will to have quick zoom chat with me, please let me know.) I also welcome along any broad suggestions, ideas, or papers on this discussion board chain.

    Thank you!

    Emily



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    /// Emily B. Frank ///
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  • 2.  RE: Comparing 3D Models

    Posted 03-09-2023 12:54

    Software: Cloud Compare for point clouds. Meshlab for meshes. Those are my go-tos. But it then comes down to how you want to present/visualize the data.

    If it's very flat (surface of a painting changing over time), instead of dealing with 3D geometry, going to digital elevation models (basically quantified depth maps) might be better. The results are basically images and if aligned they can then be compared in photoshop or other programs.

    Yale had a similar project that I was involved with the capture but the processing an analysis dragged on after I left so I am uncertain what came of the project I haven't seen anything published: https://news.yale.edu/2014/02/19/many-faces-alexander-pope-illuminating-art-history-through-digital-imaging 

    I also recall at some point a study of the Jean-Antoine Houdon Benjamin Franklin busts, but forget where that was published.



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    Kurt Heumiller
    3D Photographer/Coordinator
    National Gallery of Art
    Arlington VA
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    Original Message


  • 3.  RE: Comparing 3D Models

    Posted 03-10-2023 07:55

    Hi Emily,

    I've been working to develop 3D monitoring techniques for wall paintings in situ, initially as my MA dissertation and then I've been able to continue the research with the Getty.

    I started out using CloudCompare and comparing point clouds but found the data noisy. My colleague encouraged me to try DEMs as Kurt has suggested. We compare them in QGIS, a free mapping software with their Orthos accompanying for context.

    I'm happy to hop on a zoom call to discuss! Here are my papers also for more info and refs if you're interested:

    https://www.tandfonline.com/doi/abs/10.1080/00393630.2021.1937457?tab=permissions&scroll=top

    https://www.tandfonline.com/doi/full/10.1080/00393630.2022.2067969

    Cheers!

     Wendy



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    Wendy Rose
    Alexandria VA
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    Original Message


  • 4.  RE: Comparing 3D Models

    Posted 03-15-2023 10:23
    Dear Wendy and Kurt, 

    Thank you both so much for your responses and suggestions, and the resources you shared. Wendy, I may be in touch with you directly in the coming months as I iron out my workflow!

    Cheers,
    Emily



    Original Message


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