Lesson 08: Photogrammetry
Learning Outcomes
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Understand the concept of photogrammetry
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Recognize techniques for effectively capturing photos to create a photogrammetry model
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Describe a variety of software solutions for creating photogrammetry models
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Construct a simple photogrammetry model
Lesson Outline
What is photogrammetry?
Examples: New York Times, Visual Investigations
Exercise using display.land
Reality Capture Capturing Reality
Agisoft Metashape (use demo version, cross platform)
How to capture photos for photogrammetry (where to put the camera, lenses, depth of field, background of the object, how many photos to take, manual exposure, manual white balance, manual focus, different levels/tradeoffs of quality
In-class Exercise/Activity for Small Groups
Use display.land or Metashape
Have students bring a small object to photography that has texture and is not reflective (more texture is better.) A running shoe works great. Using a still camera is best, but smartphones can work too. Using a still camera, use manual focus, manual exposure and manual white balance. If using a smartphone, set it to manual or lock focus and exposure. Make photos by circling completely around the object making images from the same distance but different heights: high, medium, low. Have the images overlap by about 35% Capture about 50 images. Jpeg’s are fine
Readings
A Guide to Photogrammetry Photography. Published May 1, 2020.
Journalism 360°. Ben Kreimer’s Guide
How to capture photos for photogrammetry (where to put the camera, lenses, depth of field, background of the object, how many photos to take, manual exposure, manual white balance, manual focus, different levels/tradeoffs of quality
Photogrammetry for Journalism: Documenting reality in 3D
Sketchfab from Home: Cultural Heritage | Sketchfab Community Blog
Photogrammetry from NYTimes R&D
Two Useful Tutorials on Working with Reality Capture Photogrammetry software
Reality Capture Photogrammetry Webinar: sponsored by CGSociety.org
Reality Capture – Converting Photos to 3D Models (this does cover control points a bit)
Discussion Questions
What scenes/objects work well for photogrammetry?
What does the audience need to know about how the photogrammetry model was captured and created?
End of lesson feedback
3-2-1 (3 takeaways, 2 questions, 1 thing they enjoyed)