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Messages - KDSTanhope

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1
General / Re: Negligible GPU usage on Alignmnet.
« on: August 15, 2020, 06:40:12 PM »
Thanks, Tutos.

The images are not enormous but they are 16-bit. Just shy of 50MP, they are about 5500 x 8500 and some change.

There are also TWO cameras, so that will add time too... but not as much as I am seeing here.

So there is definitely something amiss and I wonder how much of it is simply down to the additional camera and additional frame size & bit depth combination?


2
General / Re: Negligible GPU usage on Alignmnet.
« on: August 14, 2020, 09:11:57 AM »
Thank you guys, this is helpful.

This particular block is comprised of ~4000 medium format images as an added bit of info.

In the preferences>advanced>tweaks section there is an option, "main/refine_max_gpu_multiplier" which has a value of 2. I cannot find any documentation on this anywhere. Any ideas as to what it does?

3
General / Re: Negligible GPU usage on Alignmnet.
« on: August 13, 2020, 05:14:42 PM »
A bit of an update from my end:

The process of detecting new points does not appear to use the GPU.

6 hours of detecting new points where neither the GPU nor the CPU were doing much of anything has me a little concerned that the bottleneck may be the drive read/write speeds.

In any case, the process of "Matching Points" does indeed load the GPU to ~100%.

Is this expected behaviour?

4
General / Re: What if GCP references exist above the cameras?
« on: August 13, 2020, 11:27:49 AM »
If your markers project above the cameras you have an issue either with your extrinsic values (in this case the Z is incorrect) or your GCP Z is incorrect.

Alternatively the block is very poorly aligned.

What were your processing settings?

5
General / Negligible GPU usage on Alignmnet.
« on: August 13, 2020, 10:29:55 AM »
HI Alexy and team.

Our workstation has, in recent updates, stopped using the GPU, from what I can tell.

System:
TR 2920X
64 GB RAM
RTX 2080 ti
4 x 4TB RAID0

Metashape:
1.6.4

Process:
AlignPhotos: accuracy = High, preselection = generic, reference, keypoint limit = 80000, tiepoint limit = 4000, apply masks = 0, filter tie points = 0, adaptive fitting = 0

While the console window indicates that the GPU is being used to find matching image points, GPU-Z and windows system monitor both indicate that the GPU is idling at ~1%. Disk usage is high.

Console:
Code: [Select]
Detecting points...
Found 1 GPUs in 0.001 sec (CUDA: 0.001 sec, OpenCL: 0 sec)
Using device: GeForce RTX 2080 Ti, 68 compute units, free memory: 9185/11264 MB, compute capability 7.5
  driver/runtime CUDA: 11000/8000
  max work group size 1024
  max work item sizes [1024, 1024, 64]
[GPU] photo 4146: 80000 points
[GPU] photo 4246: 80000 points
[GPU] photo 4346: 80000 points
[GPU] photo 4446: 80000 points
[GPU] photo 51: 80000 points
etc...

During this time the CPU load is average at 20% and the GPU load is 0-1%.

Use GPU is turned on in the settings, use CPU during GPU is turned off.

I'm at a bit of a loss and somewhat worried the enormous hardware investment was a wasted effort given that the older hardware ran considerable faster with a considerably lower overhead.

6
Python and Java API / Re: Error: [Errno 13] Permission denied
« on: December 17, 2019, 03:05:19 PM »
I fixed the issue, thanks Alexey.

It was indeed trying to write to the Program Files directory and not the directory where the project was saved.
My solution is to prompt the user to select a path which will then be the default save path:

Code: [Select]
path = Metashape.app.getExistingDirectory("Where to save coords")
and then from within my function:
Code: [Select]
file = open(path+'\coord_list.txt', 'w')

7
Python and Java API / Error: [Errno 13] Permission denied
« on: December 17, 2019, 02:47:59 PM »
Hi there.

I am trying to write coordinates to file from within a script.

Code: [Select]
file = open('coord_list.txt', 'w')
raises a permissions error.
I am using the latest version of Metashape. Any work arounds here?

8
Bug Reports / Re: Startup crashes on Photoscan/Metashape
« on: October 15, 2019, 01:56:27 PM »
Hi Melo.

The issue was resolved as such:

Solution was to switch off the second screen. Start up metashape. Close metashape on the primary display and carry on with life.

However more recently a driver update seems to have fixed the issue.

9
Bug Reports / Re: Startup crashes on Photoscan/Metashape
« on: June 27, 2019, 12:55:51 PM »
Hi Alexy.

They are both plugged into the same card. Main screen in to the HDMI port and the secondary screen in the Display port.

Driver version is: 430.86
If you know of a more stable version please let me know.

10
Bug Reports / Re: Startup crashes on Photoscan/Metashape
« on: June 19, 2019, 05:26:26 PM »
I had issues identical to what is described.

The solution, at least in my case, is peculiar but it works.

Metashape would load up and instantly lock up (Not Responding), showing only a blank white screen.

Machine specs:

Ryzen Threadripper. 64GB RAM. RTX2080TI. Win10 1809. TWO MONITORS.

The last part is important as the program will only freeze up when it loads up on the secondary screen, something it was defaulting to.

Solution was to switch off the second screen. Start up metashape. Close metashape on the primary display and carry on with life. Maybe a display drivers thing.


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