Apply correct units and model scale after using masking.

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Neugroza

• February 23, 2022 20:06

Hello, I created photogrammetry model using masking. I need to properly scale it for 3D printing. When masking was used, scale bar was removed from the model. Is it possible to apply proper units and scale to the model by using scale bar that is in the images but not part of the 3D model? I need to export to obj and 3mf. Please see attached screenshot.

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  Ondrej Trhan CR

  • February 24, 2022 08:44

  Hi, this was answered by our support.

  You can also align unmasked images (or part of it), scale it according to scale, align/update, export XMPs and use these XMPs in masked alignment.

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  Teslacoiler77

  • September 11, 2022 22:03

  Hi. You say this was anwered by support, but that does not help me.

  I am trying to scale a model, but normal method does not work. Images has been masked in two sets. After updating or realligning, scale is way off, as can be seen in atttached screenshot. Any method for doing this?

  

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  Ondrej Trhan CR

  • September 12, 2022 06:46

  Hi Teslacoiler77,
  it seems that your images are georeferenced:

  

  Can you set No in Alignment tab/Registration/Settings/Advanced/Use camera priors for georeferencing and then align again?

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  AydiAb

  • September 16, 2022 21:03

  Hi,

  I'm having the same question: I have a stone which I photographed from above and below.I am using a turn table with April tags, so I canactually set the distance accurately to 10 cm. To have one complete object I need to cut away the turn table in both components. Therefore I exporting the masks accordingly, then opening a new project and loading the images with masks. However I couldn't find a way to keep the scale of the stone in the course of the process. Is there any possibility to keep the set distance, or any other workflow?

  Thx

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  Matej Kuric

  • September 19, 2022 13:45

  Hello,
  
  You may use XMPs as my colleague mentioned, but not from all sets. 

  Scale every scene (create control points, define distance), and export XMP files as Exact (to preserve relative positions between cameras), except for one set. When exporting XMP files for that set choose to export them as Locked. This way that set will be set in space, and it won't be movable, yet other non-locked images will be tied to it based on the common features.

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