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Author Topic: Dense cloud or Sparse cloud?  (Read 2338 times)

Jobbo90

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Dense cloud or Sparse cloud?
« on: January 17, 2017, 10:06:10 AM »
Hi All,

I'm experimenting around with Agisoft and have a bit of a theoretical question.

I'm working with a close range photogrammetry project (300-400 pics), taking pictures of geomorphology of an area compromosing 2 by 8 meters. I used a Canon EOS 1300D camera with a focal length around 40mm resulting in high density point clouds.
Now i'm wondering if it is worth to bypass the build-dense cloud step for computation speed and data reduction purposes, this will result in building a mesh based on the sparse cloud.

- How would this affect the accuracy of the final DEM (I'm trying to reach mm accuracy)?
- What is it exactly that the dense cloud step does?
- If I for example run algnment at high settings I already end up with 9.5 million points on such a small area, anybody can tell if this is sufficient?

At some stage i'd like to test how the bypassing of the dense cloud affects the accuracy, but at the moment I don't have sufficient time and resources available so im wondering if other already considered these steps.

Curious about your thoughts!