Photoscan
All The Things
PHOTOGRAMMETRY
is the science of making measurements from photographs. It can be used for reconstructing parts of reality into 3D models
or even maps.
PHOTOGRAMMETRY
'Works based on shared features amongst a set of images.
In order for it to work well it needs surfaces with abundant,
non-repeating features.' (Specular)
When photographing make sure that:
- Your white balance is set manually
- Your exposure is fixed
- You are focusing on your subject every shot
- As much of the scene as possible is in focus
- If using your phone enable HDR mainly if your object is partly in shade
When taking photos, your object needs to be always in the view.
object
wall
corner
With a wall, make sure that as you capture, the main area of interest is always in the frame.
With a corner, focus on the corner itself, making sure it is always in the frame and in focus.
When scanning a free-standing object, encircle it, then focus on more complex details.
Capture at least two of these scenes:
SKETCHFAB API
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Useful Links
Tools
Photogrammetry 3D reconstruction:
- VisualSFM : A Visual Structure from Motion System: http://ccwu.me/vsfm/ (an alternative to PhotoScan)
- walkthrough http://wedidstuff.heavyimage.com/index.php/2013/07/12/open-source-photogrammetry-workflow/
- Agisoft http://agisoft.com/
- Comparison of Photogrammetry software
- DotSwarm: Pointcloud animation tool http://dotswarm.nz/
- Cloud Compare http://www.danielgm.net/cc/
- Wrap http://www.russian3dscanner.com/
Useful Links
This workshop and slides are inspired by the Exquisite City workshop by James George and Alexander Porter from the awesome SPECULAR studio.
They make, teach and share amazing stuff, check them out!
