Messages

31

General / Re: Exporting a DEM in RGB?

« on: February 04, 2019, 12:50:23 PM »

Yes it is possible.

Go to Export DEM, and under Raster Transform choose Palette. Now it export the DEM in the color like you see it in Agisoft.

32

General / Mouse 3rd button support

« on: February 04, 2019, 12:43:21 AM »

Dear Alexey
Im wondering if we could add 3rd mouse button support to Agisoft. It is so a pain to move the 3d models in the space by clicking on the navigation button. If we could add 3rd mouse, that would be awesome. And maybe in the preferences menu add the ability to chose wich mouse button does wich function.

What do you think of this idea?

33

General / Re: Built Texture, whats better?

« on: February 03, 2019, 09:49:25 PM »

Also what would really be good, if we could improve the speed of the Mesh View. Becouse often I need to upload first the models to Sketchfab to do some surface checks, becouse in Agisoft it is so extremely slow to view...

34

General / Re: Flood Simulation experience?

« on: February 03, 2019, 07:42:48 PM »

Ok Dave.
Thanks this helped a lot...

35

General / Built Texture size, whats better?

« on: February 03, 2019, 07:28:12 PM »

Im wondering if its better to have bigger texture size and less textures, or have smaller texture but higher quantities? Is texture calculated on CPU or GPU?


16K texture x 2
4K texture x 8
2K texture x 16
1k Texture x 32
512 Texture x 64

does anyone have any experience?

and would it be possible to add GPU supply to mesh calculations?

36

General / Re: Metashape RAM usage

« on: February 02, 2019, 03:18:29 PM »

USING VIRTUAL MEMORY RESOLVED A LOT OF MEMORY PROBLEMS on my Computers

I was really unhappy about Metashape crashing so a lot, and I completely forgot virtual memory as a feature becouse today, using SSDs, all our computers have deactivated it. I will still upgrade our mobile workstation to 32 GB memory (purchased it today) but with virtual memory assigned in Window you can achieve a lot of more Mesh calculations than bevore, how did I resolve it.

I added:

C: SSD 16.384 MB virtual memory
F: SSD 16.384 MB virtual memory
V: SSHD 32.768 MB virtual memory (but I have seen that Agisoft didn't used it)

I know doing virtual memory on an SSD is not very good for the SSD, since it reduces a lot the lifetime due to the high write reading sequenses, but since on each computer we have a 200 GB SSD MSATA for system and a 1 TB SSD SATA for project files, I used that as virtual memory upgrading my PC from 16 GB (wich caused a lot of out of memory in Agisoft) to 81.920 MB total available to the sistem.

A project with about 250x 12 MPixel images took about 40 GB of total memory space to calculate mesh in high-mode from dense cloud (high quality 82M points)
So a 500x image project should need around 80 GB of memory to do the same calculations.

Unfortunately, rendering mesh from Dense Cloud is not only memory consuming, but also very high CPU consuming and it took something about 4 days, becouse first it created a super high 282M mesh that was reduced to about 5M later. This is, in my opinion, a not very efficient workflow resolved yet in Agiosft and I hope they can optimize this.

So i switched to Depth Maps mode and it took in high & high mode about 4 hours on the sistem creating a 4.7M shape, wich is almost what I planned in doing in dense cloud mode.

But also in Depth Map mode my computer crashed bevore, including virtual memory resolved those problems of OUT OF MEMORY.

I hope this might help someone else here in the forum.

At moment Im going to plan to purchase a Threadripper sistem, but instead of buying other 64 GB of DDR4 RAM to have a total of 128 GB, I will spend those moneys in a second GPU.

37

General / Re: Flood Simulation experience?

« on: February 02, 2019, 03:06:09 PM »

Dear Dave
Thank you very much for your reply. LAZ could be done in Agisoft, but I guess only for the Point Cloud. How do you export Orthofoto & DEM in LAZ so that it can be used?

Can you show up some examples of what you are doing and how you do the simulation? Do you just rise the water level like it would be a plane?
https://www.youtube.com/watch?v=pFe-dMXgorw

38

General / Re: Flood Simulation experience?

« on: February 01, 2019, 06:49:07 PM »

sure, Im already in the Blender Community but I would like to know from Agisoft users if someone here is doing this kind of stuff. Maybe this person tell me to use completely another tool and I could go for it... ;-)

39

General / Flood Simulation experience?

« on: February 01, 2019, 06:26:34 PM »

Dear Agisoft users

Im wondering if someone here has an expertise in flood simulations done with Agisoft Output. I refer to large area fotogrammetric scanning of 1-2 km² and DEM creation. I have done some experiments in Blender, but the fluid calculation when importing a 3D model from Agisoft (STL format) is so slow that it probably takes 20 days becouse of the high poligon amount.

If someone has any idea how to improve this or using other programs, I would be very happy.

Thanks a lot

40

General / Re: Metashape RAM usage

« on: February 01, 2019, 04:45:27 PM »

Yes alexey I know that Height Field is faster but for visible 3D models for clients the Height Field looks very ugly when Trees are involved. If we could improve this I would be very happy.

41

General / Re: Metashape RAM usage

« on: February 01, 2019, 02:23:41 PM »

Alexey, m wondering about something and maybe you can explain this better as an expert.

I have aligned 280 images in highest mode, created a Dense Cloud with about 82M points. Now Im creating the Mesh from Dense Cloud (Not Depth Map that should use less memory) in High Mode.

From the launch windows for Mesh calculation I got an indication that I should receive about 5.5M faces, wich is pretty high becouse normaly I do only less than 2M but I want to try if with virtual memory Agisoft can handle this high caluclations.

From the screenshot  you'll see that Metashape is using almost 40 GB of Memory (16 GB modules installed, 24 GB are virtual on SSD) an since yet MS didn't crashed.

But if you see the Detail Log it looks like that MS first created a Mesh with over 258M faces and is now decimating. Why does MS calculate such high mesh? It looks like to me that MS first meshes every Dense Cloud point with at least 3 other points to create the first Mesh Step.

But would it be not a much faster process that MS, when selceting High, Mid, Low Mesh, skips ponts in betwen and creates mesh from every second, third or fourth point? Something similar like exporting the DEM with a certain Raster.

I think this would reduce a lot the memory and CPU load and improve a lot the workflow.

42

General / Re: Agisoft PhotoScan 1.4.1 - CPU and GPU Preferences

« on: February 01, 2019, 02:03:39 PM »

@Mark
So do you advice in purchasing the RX580 instead of a Vega GPU?

43

General / Re: Predicting PhotoScan Memory Requirements

« on: February 01, 2019, 01:59:39 PM »

from what I can see, RAM usage is almost need in creating the Mesh Models. On aligning & creating DenseCloud I mostly never got out of RAM even with 1000 pictures, but in creating mesh I lost every time.

It's interesting that in tiled mode I do not have this problems at all, so Im wondering if there could not be a script creating the mesh from the tiled model or from DEM

44

General / Re: Metashape RAM usage

« on: February 01, 2019, 11:27:23 AM »

Still crashes on my systems with 16GB RAM for a 1.8M Mesh creation. Im wondering if virtual memory from an SSD can help in this? I understand it is slower but would this help to do the entire calculations? Unfortunately on my old Workstation I can't upgrade memory

45

General / Re: Metashape RAM usage

« on: January 31, 2019, 09:32:28 PM »

I sent you the log created by my mobile workstation with 16MB Ram.

But Im wondering... instead of creating the Shapes from Dense Cloud or Depth Maps, why not create from DEM? Would that not be much more easy and less power consuming?

Becouse on Depth Maps for example I even don't know what the results will be... while creating from Dense Cloud it gives me an aprox. calculation of the result. It is a very pain that Metashape crash almost at the end of the calculation and that there is no save in between.

btw. how can the Depth Maps be viewed? I see them in my chunk but I can't open it.

In this 3D Survey Video it looks so simple to create mesh & do calculations... I think if we can improve this in Metashape, this would be very great.

https://www.youtube.com/watch?v=PsT-OMXj8w8