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SfM of medium to large specimens (RBINS/RMCA)

   
Digital camera Macro Lenses Wide angle lenses Automatic turntable which controls the camera (ex. Foldio360; RBINS in-house system) Agisoft Metashape (used at RBINS/RMCA
Portable (can be moved easily in a public transport)
Specialized training
Description
Depending from setup and object size
Minimum 8cm

Argonauta tuberculata, RMCA
  
Contributors: Pictures & 3D: J. Brecko
Copyright: DIGIT-3 BELSPO Licence: CC BY
   

 

Dame de Bruxelles, Royal Museums of Art and History, Brussels
  
Contributors: Pictures & 3D: A. Mathys
Copyright: Agora 3D BELSPO Licence: CC BY NC ND
   
Pipeline
Cost(s)
-Preparation time: No specific preparation time needed, unless the specimen or site is too large to image using a turntable. In this way a photo study needs to be set up at the location of the specimen or the available natural light has to be used. -Digitization procedure: In case the specimen has parts that cover other structures multiple views from different angels might be needed to make sure the covered area is digitized. As a rule of thumb each parts needs to visible from different angels on at least 3 images. Add a scale and colour chart to at least one rotation of images. About 80-120 images are taken of the full object (20-36 per rotation). -Image analysis: Using a photo studio or soft box, it is easy to mask the background from the images. When the background isn’t uniform, more human time is needed to clean the images. A masked image this will speed up the aligning process and reduce the amount of unwanted parts in the 3D model. For most specimens the images are automatically aligned. In case of specimens that are highly symmetric, a division in subsets of the images might be needed, hence augmenting the human time needed to complete the 3D model. Also unwanted background details might demand human interaction to clean up the 3D model and reducing the calculation time. The produced texture can be improved using an imaging software on the texture file.
-Digitization procedure: Depending on the GPU and RAM memory of the workstation, the complexity of the model and the amount of images, calculation time can take less than an hour to even days. -Image analysis: Normally this process takes only several minutes, but depends on the amount of post-processing needed
RBINS/RMCA: 2,000 euro (Camera, lens, lightbox, foldio360, tripod, ...) Agisoft Metashape: 549 euro edu license
Contents
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