Author Topic: Fixing that area where the point cloud is poor  (Read 2554 times)


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Fixing that area where the point cloud is poor
« on: July 09, 2015, 12:50:48 AM »
(Cameras are 9MP Lumeneras, flown at 450m AGL)

The ultra high point cloud looks great for most of my mosaic (used high quality alignment), but certain areas need some help.  (PS this same field was flown last year with Canon S-95 cameras and my ultra high point cloud was very good with one run, none of this noisy stuff or cliff dropping...)

I was sent these instructions from Agisoft:

As a workaround we can suggest the following procedure, though it seems quite complicated:
1 duplicate the chunk after building the dense cloud in original one,
2 make new chunk active,
3 shrink the bounding box to the problematic area,
4 rebuild dense cloud with new settings, providing that it is possible,
5 disable or remove all cameras from this chunk,
6 cut corresponding points of the dense cloud in the original chunk,
7 merge chunks (with merge dense clouds option on).

Summarized by someone else:

You can duplicate the chunk, shrink the bounding box, build mesh, remove dense cloud (in the duplicated chunk), repeat the operation with the different bounding box sizes. Merge duplicated chunks.

I'm at step 4 (after making a smaller bounding box area) and not sure why use NEW settings as I want ultra high and mild.  Everything still looks poor no matter which settings I choose.

What to do here?  Is this where it's supposed to look better?

Haven't even arrived at the merge chunks yet...

« Last Edit: July 09, 2015, 01:16:13 AM by aggieair »


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Re: Fixing that area where the point cloud is poor
« Reply #1 on: July 10, 2015, 07:17:39 PM »
Currently learning the whole Chunk method and finding YouTube videos to see if this is what I needed.  Out of Memory happened at all my Mesh stages, so this Chunking is probably what I need to do here.