Messages

1

General / Re: Community Based Understanding and Data

« on: August 29, 2021, 10:06:01 PM »

Thanks Alexey
I realise this could be a stupid question, but do you have a repository for such things, or should we set something up as a git repo, box etc or something of that type ?
Thanks, Parry

2

General / Re: Community Based Understanding and Data

« on: August 25, 2021, 05:20:11 PM »

Is there anyone out there ? Seems that lots of people have viewed this post but nobody has replied. Please provide your comments as we are very interested in them.  As we say in the old country, get your fingers out !
Tx, parry

3

General / Community Based Understanding and Data

« on: August 18, 2021, 05:52:25 PM »

A group of us have been using Metashape to assemble what would seem to be simple structures around our homes. Invariably we end up with poor results, either with distortion, poor alignment and any other manner of challenges which end up with us wondering what we could be doing better. 

The documentation is a bit sparse in terms of explaining how one should develop the skill to use Agisoft to create a good 3D model. We are thus wondering whether we might provide a section of this forum to get advice from others.  Ideally we could share data sets and explain the source of  problems in developing a 3D model.  Specifically we are interested in creating models of homes, both interior and exterior, but we don't necessarily want to limit ourselves to this.

Ideally people could (a) Provide a set of images which are known to create a valid model  (b) Comment on how those images were used to create the model with Agisoft and (c)Provide examples of data which was not successful in creating models.

I don't know how we would handle data on this site yet  nor how we would structure such a process, but we are posting this question to the forum.  After playing with Agisoft on and off  for 12 months, we have yet to end up with a series of well aligned photos which lead to a superior model.  Perhaps there are others in a similar situation.

4

General / Re: New and still wondering...

« on: May 26, 2021, 10:37:00 PM »

Thanks for the quick reply Alexey.  I am afraid between 2 of us, we have never been able to get a decent alignment of any specific group of images.  Nonetheless, I will send what we have  -  unfortunately, this will have to be in a group of emails unless you have a repository for us to upload to.   We will of course do this.  Additionally, there is no error log of any kind that I can find when the system crashes because of rapid growth of memory usage in Ubuntu 20.  There is no metashape crash log, and the system log does not show anything.  I have tried to find an nVidia log but that does not exist either.  I started monitoring memory usage with top  in Linux and we just see the % of memory usage climb to > 80% at which point the disk is thrashing and the system hangs.    So we have reverted back to Ubuntu 16.  The nVidia drivers for Ubuntu 16 are lower in sequence number than for Ubuntu 20 as far as I was able to install them.  What might be useful for users like ourselves is to get a reference image set, with a set of assigned settings for alignment, cloud generation, texture generation etc.  so we could assure ourselves of our approach and understand what happens when we use different settings.  Then perhaps users could also upload problematic image sequences and we could help each other.  The learning curve is high with this software and there are many places one can screw up.  As for the video my system easily views it with the "videos" application on my Ubuntu 16 system.   For the moment, we have given up with Ubuntu 20 because it always crashes, usually creating a dense point cloud.  Alexey, I am astounded at how much you do all by yourself.  This must be a 24X8 job 

5

General / New and still wondering...

« on: May 26, 2021, 09:42:12 PM »

A group of us (probably not reading the manual enough) have been working with Metashape and Ubuntu.  Using a GeForce GTX 1050 Ti with 4 GB memory we just cannot get a  (any) group of photos to align properly, We learned that taking photos from one location and pivoting around that location does not work (its in the manual), we learned that although it would seem easy to rearrange the photos in the workspace to better enable the sequential aligment, we could not find any way to do so without renaming them(prepending 1,2 3 etc), we learned that Ubuntu 20 with the latest nVidia drivers has a bad memory leak and crashes the rendering process to the point of chewing up 20 GB of memory and providing no errors and we learned that an mp4 video cannot be imported and throws a "The QMediaPlayer object does not have a valid service -  which seems to indicate that the player is not opening the file.   All in all this has been quite a frustrating experience. After some 300 hours of playing with images of all kinds we still don't understand how to make metashape 1.7.2 work properly with a set of photographs. Why when we add images does it say the images are not calibrated for example (NC) ? Why when one looks at a sequential set of images to the human eye it appears that we have captured the right images for aligment. Perhaps if there were a reference set of photos that represented a building of some sort with explicit instructions to build a model out of them that might help.   What does it take to understand how this software works and how to optimise the image capturing process so that the images are best optimised for alignment.  What exactly is the alignment process looking for ? It appears that most of the time the mapping of images is from colour point to colour point not from geometrical structure to geometrical structure.  We find that if you have a stucco wall the alignment is excellent, but if you are looking at longer frequency geometric structures then its not so great.  Any advice would be gratefully accepted.   Thanks !

6

Bug Reports / Re: Installation fails on linux

« on: January 19, 2021, 02:15:22 AM »

Hi Alexey
It is 1.7.0 build 11736
But I seem to recall it did not make any difference

What is puzzling to me is that I rebuilt this system some time ago. Prior to rebuilding it, there were no probems.  I wish I had the original installation that caused no problems.
Thanks, Parry

7

Bug Reports / Re: Installation fails on linux

« on: January 18, 2021, 05:37:45 AM »

Well, looks like inserting the line in  the metashape.sh file
"export QT_DEBUG_PLUGINS=1 "  solved the problem.   
This Qt platform seems a bit hairy...

8

Bug Reports / Re: Installation fails on linux

« on: January 18, 2021, 04:59:27 AM »

Well it seems that this has been viewed 600+ times so perhaps there is a solution to this issue.

I'm afraid that the error  occurs for me also in Ubuntu 16.04

"qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: offscreen, xcb."  metashape.sh: line 21: 32632 Aborted                 (core dumped) "$dirname/$appname" "$@"
appears for me
It makes no difference if I ssh or execute the file locally.  Exactly what requirements are there of the shell installation script ?   Does it expect a specific version of python ?  There seems to be something missing here in my Ubuntu 16 installation.