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Topics - Reservoirdog

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1
Feature Requests / Tool to decimate dense point cloud
« on: May 14, 2020, 04:16:05 PM »
I know there are similar request, but I want to start a new one.
To create really nice Orthophotos, we tend to produce very large dense point clouds. (500 Mio. points and more)
When we have to export points to other companies for planning purposes, we often have the difficult
task to decimate the point cloud.

At the moment, this can only be done using third party software like CloudCompare or FME.
A tool directly in Metshape would be very convenient, even better would be a tool which uses several ways (algorithms)
to achieve the decimation, e.g. total number of points, space between points, and some smart algorithms to decimate points
at planar areas instead of curvy (high altitude changes) areas.

thx for considering this request for future builds, also keep up the great work!
Metashape is a fantastic and capable product!

best regards, Chris.

2
General / Cesium 3d tiles not working in Cesium anymore
« on: March 12, 2020, 03:36:10 PM »
In the currenct version of metashape, the cesium 3d tiles don't work in cesium anymore.

I have cesium-exports from Photoscan working (from 2018) which were exported the same way,
so I guess the export is broken somehow in the current version of metashape (1.6.2).

I can provide my export if needed, but a collegue gets the same results/problem with a different dataset,
so I guess it's a general problem.

Has anyone else the same problem? Has anyone got it woking with the current version of metashape?

thx for any advice, Chris

3
General / some problems/questions
« on: March 10, 2020, 06:01:31 PM »
Hello community!

I got a few problems/questions, I hope you can point me in the right direction...

I have flown a school area with the drone and did the whole reconstruction process with metashape,
so far so good.

Now the goal is, to visualize two variants of new chimneys in the model.
Those were modeled seperately and have also been textured seperately.

Question 1: Is it possible in Metashape to view more than one model at a time?
When I import another model, I can only switch to the chimney, but cannot view them together to check
if the imported model is at the right place/height.
I realized it is only possible to merge the models together, but then the textures of my chimney is destroyed.

Question 2: I want to visualize the results in Cesium using our company GIS software.
The Cesium implementation only works with tiled models (3D tiles). I tried to load my chimney model
and create a tiled model.... without success. Errormessage is: "Cannot calculate pixel size". Any hint on this?

4
General / Merging two pointclouds not working
« on: August 15, 2019, 04:43:36 PM »
I have a big pointcloud from an UAV project which has two tunnels where flying the drone was not possible.
So we captured points manually with a tachymeter (classic surveying). I imported these points in a separate "dense pointcloud",
which worked fine. Now I cleaned the big pointcloud in the areas of the tunnel and want to merge the tachy-points into the big pointcloud.
When I select both dense pointclouds and select merge, it seems to do it, but afterwards I cannot see the tachypoints in the merged pointcloud.
Also the numbers of points aren't correct (I would expect number of big pointcloud + my 155 tachy-points, but the numbers stay the same).
Any hint on how to bring "manually measured points" into a dense point cloud?

see screenshots, and also the log:
2019-08-15 15:13:46 LoadProject: path = Y:/Fislisbach_Birmenstorf_K418/Agisoft/Dense_TachyPoints.psx
2019-08-15 15:13:46 Loading project...
2019-08-15 15:13:47 loaded project in 1.332 sec
2019-08-15 15:13:48 Finished processing in 1.337 sec (exit code 1)
2019-08-15 15:23:37 MergeAssets
2019-08-15 15:23:37 Merging assets...
2019-08-15 15:26:10 Dense clouds have different color format, they are merged as RGB
2019-08-15 15:26:10 Finished processing in 153.912 sec (exit code 1)

5
General / Digitizing Breaklines (Polylines) in Dense Pointcloud
« on: July 29, 2019, 12:46:56 PM »
Hello Photoscan/Metashape Community!

I am trying to create/digitize breaklines in the dense PointCloud.
That way, I can later produce a precise Mesh, where the breaklines are considered.
(I need a mesh from roads where the edges are precise - no trianlges going over the edges...)
However, when I am digitizing polylines in the dense pointcloud, the vertices aren't correctly picked.
I was trying to pick points from several views/directions, but the resulting polyline/breaklines always reside in the air (many centimeters above the actual points).
Is there any possibility to correctly pick points/vertices for the polylines? A sort of "snapping" would be convenient...
I will add some screenshots later to illustrate the problem...

Also: What is the general workflow to produce breaklines in Agisoft? Is there any?
I am testing VS (Virtual Surveyor) in parallel, but I would love to achieve theses tasks directly in Metashae/Photoscan....

Regards, Chris.

6
General / Importing Pointcloud from Laserscanner (Cyclone Export)
« on: April 02, 2019, 09:14:18 AM »
Hi Agisoft Community!

I'm experiencing problems importing pointclouds into Metashape.
Only formats which can be exported by Leica Cyclone (and are supported by Metashape) are PTS and e57.
PTS got me a 24GB FIle from cyclone, but Agisoft "imported" only 3400 points on strange locations.
I then tried the e57 format which gave me a 140GB file (Ascii I assume) which started to import good in Metashape.
I then left it that way, and now after 18 hours import stands at 70% with 100% CPU and no further progress.

Is there any advice on how to successfully import pointcloud-data from Laserscanners (Leica?)?
Which formats works best? Has anyone got any pointclouds from Leica Cyclone into Metashape?


7
Feature Requests / Hotkey to "Center View"
« on: August 16, 2018, 05:01:40 PM »
As a user who works extensively with a 3dconnexion SpaceNavigator I find myself pretty often
right-clicking and "center view". It would be great to have a hotkey to center the view.
Or is there anything I have missed? Is there any way to quickly set the view-center?

8
Hello Community!

I have a big project with 1028 cameras. In the dense point cloud process, depth map filtering takes a lot of time,
I already aborted at about 16% (after running about 14 hours).

I read the post from Alexey http://www.agisoft.com/forum/index.php?topic=8361.msg39925#msg39925
about using the parameter "max_neighbors = 50" to limit the impact of huge overlaps.
Sure, many cameras of my project have big overlaps, but that's because I don't want any "shadows" of no point information.
It is a church-building consisting of many little gaps, also at the windows. I got the idea of disabling so-called "overview-pictures" but I only have about 10-12 of these in higher altitude.
My question is: How do I use the "max_neighbors" parameter?
I tried putting it in the console, but always get errors like:
Code: [Select]
chunk.buildDenseCloud(max_neighbors = 50)
---------------------------------------------------------------------------
NameError                                 Traceback (most recent call last)
<ipython-input-1-985a66c24864> in <module>()
----> 1 chunk.buildDenseCloud(max_neighbors = 50)

NameError: name 'chunk' is not defined

Is there any trick? Or is it only possible to use the parameter in a python script?

thx for any info, best regards, Chris.

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