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Messages - James

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1
As I understand it, the 'convert images' function will not convert a fisheye image to rectilinear, it'll just convert it to an ideal fisheye image, so perhaps you got lucky on the variation workflow where the camera type was still set to the default 'Frame' rather than 'Fisheye'?

Just a thought anyway!

Quote
Not sure if this is a bug or feature, but using the 'convert images' on a set of fisheye images, the output seems still to be a fisheye rather than rectilinear image.
Hello James,

The undistortion operation result corresponds to the selected camera type, so if the camera type is Fisheye, then you should get an "ideal" fisheye image.

2
Take a look at this Orthomosaic seamline editing (patching) tutorial. I think it should be all you need to fix your orthomosaic.

https://agisoft.freshdesk.com/support/solutions/articles/31000148853-orthomosaic-seamline-editing-patching-

3
General / Re: Export Model with Scale Bar Visual
« on: January 10, 2024, 05:49:48 PM »
If your model is to scale, and you have/make your own model of a scale bar, then you can import the scale bar model to your chunk and merge the models.

In order to place the scale bar where you want it in relation to your model, you would have to import it to a separate chunk first, and then turn on 'show aligned chunks' (though you may have to tweak the scale/position/rotation of the scale bar chunk, using the transform object tools, before it will interpret it as an 'aligned chunk'), and then you can use the transform object tools to put it where you want it. Finally merge the chunks to get a single model including both your scan and the scale bar.

I've not tried it!

4
General / Re: Problems aligning cameras
« on: December 12, 2023, 07:43:27 PM »
I would first try to identify 1 single unaligned photo that you think has sufficient overlap with at least 2 of your 390 aligned photos, and post it here along with the 2 aligned ones so see if anyone can identify why it didn't work.

One possible reason is insufficient overlap, but you did say it was high so it might not be that.

Another possibility is that 'generic preselection' didn't identify those particular images as a good match (because it only looks at lower resolution versions to work out the pairs) and so it never tried to align them. You could test that by using a smaller number of images (a handful from the 390 aligned, and a handful of close but unaligned neighbours from the rest) in a chunk with all preselection disabled (because that's much slower) just to check if the images do overlap enough.

If that works, then you could try grouping your photos into chunks of ~400 that do align with generic preselection, and then some connecting chunks of fewer, but definitely overlapping, images which can be aligned with preselection disabled, and then once you have everything aligned in separate chunks you can align the chunks by 'cameras' and then removing the connecting chunks and merge the rest, and optionally do tools -> tie points -> build tie points to generate actual matches between the groups, but this is getting a bit advanced and if you've had to go to these lengths to get here then it's likely that your images aren't very good or the overlap is inadequate and so results may still be poor.

5
General / Re: Scan inside and outside a house?
« on: November 30, 2023, 08:13:26 PM »
one possibility would be to disable all interior images while making the mesh of the exterior

6
General / Re: Seamlines re-use
« on: October 27, 2023, 12:16:25 PM »
+1 for a method to do this please.

I often spend a long time manually assigning images only to later realise that I should have done colour correction, or not done it, or added some more photos, or improved the alignment, and then subsequent rebuild of the orthomosaic causes all the shape/image assignments to be lost.

I'm not saying it can't be done currently, but I don't know how.

7
General / Re: Build Point Cloud
« on: October 27, 2023, 11:44:07 AM »
It seems like Metashape doesn't automatically switch the dense cloud view after building the dense cloud.

You can switch to it by either double clicking the newly created "Point Cloud" in the workspace/chunk explorer bit, or Model -> View Mode -> "Point Cloud - (various options)" or the Point Cloud icon in the toolbar (showing a 3x3 grid of points).

If none of those work then I guess it really didn't do anything, like you say!

8
General / Re: How to get extrinsics from XML
« on: September 01, 2023, 06:30:24 PM »
Don't know if this helps, but I struggled with the XML format almost 10 years ago and think I came up with something that worked for me, though I haven't returned to it since.

Take a look anyway, and see if this helps:

https://www.agisoft.com/forum/index.php?topic=2351.msg12556#msg12556

9
General / Re: New Depth Map each mesh generation
« on: August 29, 2023, 05:36:04 PM »
Is this the way it's suppose to work?

Yes, except building the mesh doesn't require a dense point cloud to be built first. Both the dense point cloud and the mesh are derived directly from depth maps.

The quality you specify in the 'build mesh' dialog corresponds to the resolution of the depth maps so, each time you change the quality setting, new depth maps need to be generated at the appropriate resolution.

I would think that once I've generated the dense point cloud any mesh is going to be a derivative of that and a new depth map shouldn't be required.

If you do need/want both dense point cloud and mesh, then the depth maps for one can be reused for the other, but only if you opt to generate both with the same quality setting.

Furthermore, though I think this goes beyond what you're asking, it is possible to keep depth maps for multiple quality levels, but you have to manually right-click the depth maps in the chunk explorer workspace and uncheck the 'Set as default' option so that they will not be overwritten when you generate at a different quality level. Then when it comes to reusing them to build a mesh or point cloud you have to ensure that you have set the appropriate set of depth maps (for the quality you want to 'build' at) to be default before you can opt to reuse them in the build mesh/build point cloud dialog.

10
General / Re: Jello effect in Orthomosaic generated for Micasense Altum
« on: August 29, 2023, 04:59:25 PM »
this is all from memory so some of the names/places of things might be a bit off!

right click on the affected part of the orthomosaic and select 'open image' (i think this was available in 1.8.5). then you will see which image was used to generate this part of the orthomosaic. you will probably/hopefully find that for whatever reason it didn't choose the best image for that part, i.e. too far away or at an oblique angle.

to fix it, draw a polygon around the affected area (turning on seamlines can help to see the extent of the area covered by this suboptimal image) and right click on the polygon and choose assign images. then select the image that should have been used. once happy, right click on the orthomosaic in the chunk explorer (i forgot what it's called exactly) and choose regenerate to apply your changes and blend the images together nicely.

if there is no better image to choose from in the 'assign images' window, then either you didn't get a good image of that area, or some of your images are misaligned.

11
Bug Reports / Re: Details view sort by column
« on: March 30, 2023, 11:40:40 AM »
Sorry, I should have been a bit more rigorous before reporting it as a bug.

Hopefully I'll soon get a chance to pin it down, and try to reproduce it on a smaller project that I can share.

12
Bug Reports / Details view sort by column
« on: March 29, 2023, 11:10:42 AM »
Metashape Pro 2.01 64 (15986) on Windows 10

I had noticed this in previous versions too and assumed it would get fixed eventually but it appears not yet!

It appears that sorting photos by clicking on the column headers in the photo pane does not work if certain filters have been applied. It seems to be an issue if "filter by point" was used, on either the sparse cloud or mesh, or "filter by marker", but when using "filter by tie points" it does appear to work as expected.

I noticed because I wanted to sort by 'enabled' after filtering photos by a point on the model surface, to then further filter the disabled photos, but they were always still disordered. So then I tried some other columns and experienced the same. It seems like clicking the column header sometimes has no effect on the order, and sometimes it will just reverse the current incorrect order.

13
Bug Reports / Re: Generate planar orthomosaic doesn't use right coordinates
« on: November 27, 2022, 12:47:12 AM »
* EDIT: I think I was confused *

14
Bug Reports / Re: How to keep camera position and rebuild Tie points?
« on: November 24, 2022, 03:54:52 PM »
I think 'Tools -> Tie Points -> Build Point Cloud...' is what you are looking for

15
Feature Requests / Re: multiple tabs for same data type
« on: November 21, 2022, 02:52:54 PM »
With images you can have multiple tabs (right-click the image in Photos pane and 'Open in New Tab'

Then you can right-click the new image tab and 'Move to Other Tab Group' so you have two images open and visible at once.

It's not perfect but it helps.

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