3D-Photo – survey with XTion and Skanect

3D-Photo – survey with XTion and Skanect

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A previous article reported a first experiment with XTion and Scanect. At that time, 2 years ago, results were average in terms of quality, usage and stability. (see here)

The new 2015 version (1.8) of the software (http://skanect.occipital.com/) brings much more confort and good results.

Prepare

New options help to get a better recording session:

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One of the big change is the control on the bounding box. It can be extend to 12x12x12m. For better results, it’s recommanded to set a wider bounding box to capture everything. Problem, by increasing the range, one may loose details. The best is to put the sensor  horizontally before starting to scan.

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Record

The recording is much more stable. The acquisition is faster and if it’s still important to have a very regular move, it does not cut as it did before. It’s possible to restart from a given point and carry on scanning. A more brighter situation can be handdled.

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Reconstruction

Reconstruction is now pretty fast. Before, it was a real issue when on site, sometimes far from electricity supplies. It took hours to rebuild the model draining the power of the computeur. It’s now almost in real time.

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Process

The process part is also improved. New options allow a better control on the model such as removing small components, filling holes and colorizing the mesh.

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Share

The sharing options enable to save and export the model. Several qualities are offered. It’s also possible to upload to Sketchfab when enterring the API number.

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Other context

The example above perfectly fits to Skanect. It is dark, it has a lot of details, it’s very bumpy. For a room, that’s not exactly the same story.

It’s very important to prepare the scanning path. It’s has to be along an imaginary spline as fluid as possible. A bad path can occur this kind of results :

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Sad but funny !

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There, the Senser has been put on the table before starting, results are better, despite a lot of specular reflexions and metallic surfaces.

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There are a lot of details in this scene, the resolution is not enough to capture everything. It looks a bit melty, but it could be a wonderfull layout to rebuild in 3D.

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This is a test for an object.

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Much better.

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Conclusion

For $129/99€ only, Skanect is a very nice solution for very narrow, dark and unconfortable places to scan. I’ve tried it in caves where I had to crawl to go through very narrow paths, it was there perfect.

I imagine that with a new generation of sensor, it would be even better.

Visualization in Meshlab

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The Kitchen

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With Unity 5

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