Topics

1

Bug Reports / Emergency! File "can't save" anymore!

« on: January 07, 2019, 08:16:33 PM »

Hello everybody,

I started a very long process for 7 chunks, which now contain dense clouds with 0.8 - 1 billion points each! Today, the process finished, I have beautiful dense clouds and DEMs now, but when I try to save the project, it simply says "can't save file".

The respective .files folder is in the same directory as the .psx. I have tried to create a new .psx and it will work for like a minute, but then abort with the same error.

Could this be, because my project is too large now? Is there any solution to save my project?

Thank you very much!

EDIT: also one of the chunks won't even allow me to export the DEM! It says "Can't write image: C:/Users/...." .. This must be because of the size right? Is there a solution?

2

General / Why can I not select 'Build DEM'?

« on: February 07, 2018, 02:45:18 PM »

Hello,

I just updated to 1.4 and face a problem I have never seen before:

I create orthomosaics of aerial pictures and my usual workflow goes like this: import images, allign photos, import GCPs, Point Cloud Optimization, Dense Cloud Generation, DEM generation.. and so on.

I have done all steps until DEM generation, but I am now unable to select the 'Build DEM..'" function. I have done several orthomosaics already and usually I was always able to create a DEM after having generated a dense cloud, so I really have no clue what could have happened. Could this be related to 1.4?

Can somebody give me reasons why I cannot select 'Build DEM..'? What I noticed during my work flow:

I had problems with point cloud optimization for this specific chunk. The input images are relatively low resolution, because I want to use this one as a mere background image for reference. I deleted points with high reconstruction uncertainty, high reprojection error and low projection accuracy, but I did NOT optimize cameras, because it completely ruined my alignment as soon as I tried.. which is due to the low quality of the input images I assume.

Could the missing Camera Optimization be responsible?

Thank you very much

3

General / Is it possible to 'overwrite' mesh?

« on: November 16, 2017, 06:24:21 PM »

Hello,

I am a student working with Agisoft for about 1.5 years now. My first question I want to post on this board is rather simple, but I can't help but wondering: what happens if I calculate the mesh twice within a project?

For example: I've generated a dense cloud, calculated a height field mesh, calculated a DEM and was just about to generate a orthomosaic, before I remembered: Hold on, I actually need a arbitrary mesh.

So i abborted the orthomosaic generation and started calculating a arbitrary mesh. After this is done: will the height field mesh that was calculated before, be basically overwritten? Is it ok to do it the way I did, or do I need to generate the dense cloud a second time?

As a further question: Would you recommend me to calculate the DEM from the arbitrary mesh or the dense cloud? For my project I am generating high resolution orthomosaics, in order to do volumetric measurements, which I need to be extremely precise (error within 1 dm3). Are the mosaics more accurate when calculated from the dense cloud or the arbitrary mesh?

Thank you so much in advance!