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Messages - cbnewham

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61
I am surprised it has been around for some time and has not been addressed - and that it is a "feature request"!

This is a bug, not a feature request.

 ::)

62
Hi,

Is there any way to stop the viewport camera from being reset when doing a realignment?

I align the cameras, get the tie points of the sparse cloud and then find I have mis-aligned cameras. I filter on those cameras and then reset their alignments (sometimes I do this one at a time so as not to replicate the incorrect alignments). Unfortunately every time I then select a camera or cameras and align them the view jumps back to a pre-determined view. This is really annoying! I can't see if the points being added to the sparse cloud are being added back in the correct locations because the section they are part of may be off screen in the view.

This also happens sometimes when saving the file - equally annoying.

Is this possible Alexey?  I don't see why not as the bounding box isn't changing from the original alignment of all the cameras.


63
General / New article on photogrammetry / Metashape
« on: December 06, 2019, 03:49:02 AM »
Hi,

Not really sure if this should go in the General forum, but I've had an article published on using photogrammetry to record church architecture and art. The photogrammetry was carried out using Metashape.

I have placed a copy of the article here (originally published last month in "Ecclesiology Today"):

https://www.academia.edu/41196210/The_application_of_computational_photogrammetry_to_the_study_of_churches


64
General / Re: Agisoft Metashape 1.6.0 pre-release
« on: November 24, 2019, 09:43:28 PM »
Select by point is not working how I would expect it to.

Build 9397.

I create the sparse could and see that I have sections which are mis-aligned.
I select some points and press "Filter photos by point". I correctly get a dozen cameras. I reset them and re-align. All OK.

I then see some other points that are not right and select those and follow the same procedure.  In the "details" list of the photos I get a list of several cameras. However, if I Ctr-A them or even select them individually and do "Reset alignment", I am told it's going to reset far more cameras - in fact, I believe the set of cameras to be aligned each time is the summation of previous selections and it is not being reset when a new "filter by point" is done.

In one case I had filtered only 7 cameras (and the list showed only 7 cameras) but the reset said I was resetting 90! If I carry out the realignment it is clearly realigning 90 due to the time it takes.

If I remove filters, select one camera and do "Reset alignment" then it correctly says I am resetting one camera. If I then do select by point as above it all works again as expected.


I wish there was also a way to see what's not aligned clearly in the photo display - something I've requested before. Grey ticks on a dark grey background are next to useless. Perhaps consider allowing us to change the colours for various parts of Metashape? A way to sort in details by "disabled camera" would also be of great assistance.

Thanks - these are small issues in an otherwise fantastic program.

65
General / Re: Agisoft Metashape 1.6.0 pre-release
« on: November 11, 2019, 11:10:32 PM »
With build 9487 I'm getting:

Assertion 239107090 failed at line 7122!

when trying to construct the mesh from depth maps. This occurs both on Ultra and High quality settings.

I attach the log file.




66
General / Re: Agisoft Metashape 1.6.0 pre-release
« on: October 23, 2019, 09:19:10 AM »
Hi Alexey,

I set the number of faces to 4,000,000 and it didn't  generate the error again. I will post the log if it happens again.

Thanks!

67
General / Re: Agisoft Metashape 1.6.0 pre-release
« on: October 22, 2019, 12:20:41 PM »
Just trying this new version.

I used a model I've previously built on High. This time I tried Ultra and it worked with 2,000,000 faces, but when I upped this to 6,000,000 faces to produce a more detailed mesh I got "Assertion Failure at line 118" after processing for a couple of hours (BTW, I selected "reuse depth maps" on that second build).

Also, this version has the out-of-core processing. I presume that is using Disk to offload things to? There don't seem to be any settings for this?

Good work - looking forward to the next release.


68
General / Re: Remove background from model
« on: October 20, 2019, 05:42:45 PM »
Is it a plain background? Others will be more expert on this, but it looks like you have a lot of points that are from the background generated at the wrong distances because the background had no features. I suggest you mask the background in every image.

It looks like you are using a turntable and I've never done photogrammetry that way, so others may have more experience and be able to make other suggestions.

69
Feature Requests / Re: Improved mesh detail
« on: October 14, 2019, 02:21:49 PM »
This sounds very useful. It would be nice to see this feature incorporated.

70
Feature Requests / Iteration for camera alignment
« on: October 14, 2019, 02:00:09 PM »
I find that when I align a large set of cameras using the Generic setting that I end up with photos that have not been aligned. If I then select these I can usually align them. Sometimes I still end up with some unaligned cameras - so repeating the process by selecting those and aligning them usually works.

It would be nice if Metashape had an option to specify the number of iterations of alignment in order to perform this task automatically. So - alignment over the entire set of cameras as we currently have, then iterate a user-set number of times on anything that has not been aligned.


71
Feature Requests / Clear markers for "not aligned"
« on: October 14, 2019, 01:55:27 PM »
I find the current grey ticks make it very hard to see what has and what hasn't been aligned.

It would be nice to see much better visual indications of what photos have failed alignment. It would be even better if whatever coloured markers are used could have their colour changed in the Preferences.


72
General / Re: Best practice for chunks
« on: October 14, 2019, 11:47:45 AM »
Thanks Alexey for the advice.

I will have a go and see how this works.

73
General / Best practice for chunks
« on: October 10, 2019, 06:56:39 PM »
Does anyone have a document or website detailing the best practice with chunks? The manual just tells you how to create them and copy cameras to them.

In my case I have a model which I can't generate in one go because the mesh creation from depth maps runs out of memory.

In the past I've loaded all the photos in, created the sparse cloud, and then duplicated the chunk several times and in each one selected from the 3D view a subset of cameras to keep active and disabled the others (keeping some overlap of selected cameras between chunks), then created the dense cloud, then merged the chunks, exported and decimated the dense cloud, then imported and created the mesh.

I'm not sure if this is the way to do it or if there is a better way. I'm also unsure if this will work using the new mesh from depth-map generation.

Thoughts (or tell me this is not the best way!)

Thanks.

74
General / Re: Find cameras from points in sparse cloud
« on: October 10, 2019, 06:46:36 PM »
Thanks James. I will try this out.

75
General / Find cameras from points in sparse cloud
« on: October 07, 2019, 04:49:25 PM »
I have had a look through the manual but cannot find how to find a way to see which cameras produced which points in the sparse cloud.

I've not really encountered problems up until now but today I generated a sparse cloud that clearly has a group of points forming a surface intersecting the rest of the correctly generated cloud - so they must have been produced by a group of cameras with bad alignment.

Is there a way I can select some of the errant points and then show the cameras/photos involved?

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