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Author Topic: Editing sparse point cloud doesn't clean geometry?  (Read 5698 times)

andyroo

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Editing sparse point cloud doesn't clean geometry?
« on: May 07, 2012, 11:48:56 PM »
I was trying to keep bad geometry from being generated in a lake by removing all of the sparse point cloud data from the lake. In the reconstructed geometry, there are many messy vertices still in this area. Did my point cloud editing do anything?

On a similar vein I saw an earlier post on flattening water bodies. Is there an easy way to mask out water areas within photoscan, or am I better off just deleting vertices in the mesh, in or out of photoscan?

-Andy

Wishgranter

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Re: Editing sparse point cloud doesn't clean geometry?
« Reply #1 on: May 08, 2012, 02:04:46 AM »
just use mask on parts that not want........
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andyroo

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Re: Editing sparse point cloud doesn't clean geometry?
« Reply #2 on: May 10, 2012, 01:30:44 AM »
Ok. getting the hang of masks. Useful, but time consuming. Have to delete them to get orthos on top of masked/flat surfaces.

What exactly does my point cloud editing do though. Is it even worth this step?

Alexey Pasumansky

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Re: Editing sparse point cloud doesn't clean geometry?
« Reply #3 on: May 11, 2012, 01:16:20 PM »
Hello Andy,

Editing point cloud may be a useful step before optimizing the photo alignment step.

In the cases the quality setting in the Build Geometry dialog is set different to "point cloud" the sparse point cloud is not used for 3D-model reconstruction.
Best regards,
Alexey Pasumansky,
Agisoft LLC

andyroo

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Re: Editing sparse point cloud doesn't clean geometry?
« Reply #4 on: May 11, 2012, 11:20:25 PM »
Thank you for mentioning this, Alexey. I usually optimize photo alignment after entering GCPs, so this is valuable advice.