Topics

1

General / Differential scaling

« on: September 26, 2024, 03:53:35 PM »

A question about markers and scale bars.

I have markers and known lengths along two roughly orthogonal axes. I assumed (perhaps incorrectly) that the model would be scaled differently in order to meet these scale bar values. Rather than just scaling uniformly.

But it seems that isn't happening, or I don't know to enable that ability. Obviously, one would like to think that all axes are being reconstructed with a constant scale, but in this case that does not seem to be the case.

For example, if I set the scale bar values on the horizontal plane, the vertical distances are incorrect, while other measurements on the horizontal plane are correct. Similarly, if I set the scale values for the vertical plane the distances on the horizontal plane aren't correct, while other measurements on the vertical are correct.

2

General / Marker positions

« on: August 20, 2024, 02:42:20 PM »

See attached.
In the past I'm "sure" I could double click on the positions of the markers and set their values. Don't seem to be able to now. Ideas why?

3

Bug Reports / Crash on align points in high mode

« on: December 09, 2023, 08:18:51 AM »

Metashape and MetaShape Pro crash at the start of the align points phase.
Works for "medium" but fails for "high".
I've processed much larger projects than this in the past, this only has 135 photos from a 100MPixel camera.
Logs for medium and high are attached, and I sent in the crashlog.

4

General / Canon RF 5.2mm F2.8L dual fisheye

« on: September 19, 2023, 04:10:41 PM »

I'm a long time user of MetaShape Pro, we have a project where we want/need to reconstruct a very complex internal room. Lots of objects with complex occlusions. An idea I had to reduce the number of photographs is to use the Canon dual fisheye lens on the Canon R5, a fisheye stereo pair. Does this make sense? Can I link the two fisheye images to be a specified distance apart? Noting that I've done some work with the Canon dual fisheye, it is "extremely" linear.

5

General / Displacement map

« on: January 13, 2023, 11:42:52 AM »

In the changelog for version 2.0.0
    https://www.agisoft.com/pdf/metashape_changelog.pdf
it says, first item, that it added displacement maps in the build texture dialog.
Where? I don't see it,

6

Camera Calibration / Adaptive camera model or calibration groups

« on: September 20, 2021, 05:40:44 AM »

I have a large scale drone survey with two different drones.
Is it better to manually split into two camera calibration groups or use the "Adaptive camera model fitting" during alignment?
Does it make any difference?

7

General / Building texture from Orthomosaic

« on: July 07, 2021, 05:25:25 AM »

I have a point cloud and orthomosaic image in the same coordinate system.
I can build a mesh from the point cloud.
Is it possible the create textures for my mesh from the orthomosaic?
MetaShape Pro.

8

General / Exporting depth maps

« on: September 10, 2020, 07:45:01 AM »

Why, after creating a dense point cloud, can't I export the depth maps? They exist at that point. The menu is only active after I create a mesh, a step I should not need to do in order to get the depth maps.

9

General / Sparce and dense cloud export

« on: September 10, 2020, 06:29:40 AM »

If I export the sparce point cloud I get a sensible result, first few lines look like this

0.4533 0.8372 -2.5517 82 59 54
0.4743 0.8431 -2.5234 142 125 119
0.4728 0.8505 -2.5284 141 124 117
0.4890 0.8367 -2.5219 146 137 133
0.0657 0.8378 -2.6840 205 197 184
-0.0097 0.8394 -2.7019 198 188 175
etc etc

But if I export the dense point cloud, same model, I get seemingly incorrect values for z axis, first few lines

-0.8732 1.4543 -6356755.8168
-0.8827 1.4062 -6356755.8348
-0.8887 1.4715 -6356755.8116
-0.8870 1.4534 -6356755.8185
-0.8990 1.4234 -6356755.8288
-0.9016 1.4706 -6356755.8125
-0.9136 1.4397 -6356755.8219
-0.9127 1.4105 -6356755.8305
etc etc

What might be causing this?

10

Face and Body Scanning / Body scanning report

« on: August 29, 2019, 10:31:19 AM »

I posted a few question to this group and the general group in the past related to a future body scanning project I was to be involved in. There were some unique requirements, namely higher than usual capture volume (for swimmers with arms fully extended) and smooth largely featureless skins (elite swimmers).
This is a report on the outcomes rather than a question. See document here
    http://paulbourke.net/reconstruction/humanscan2/

11

Texture De-Lighter / Test3

« on: July 11, 2019, 02:01:37 PM »

Another test, files here
    http://paulbourke.net/transient/delight2/
Or just check out the summary pdf.
Any comments on the addition of blue tint to the shadow regions?
Note, the result in MetaShapePro was unsuccessful.

12

Texture De-Lighter / Test2

« on: July 08, 2019, 05:03:43 PM »

See another example here
    http://paulbourke.net/transient/delight/

There is some chromatic defects being introduced. Is this because it is only working in 8 bit despite my textures being 16 bit with a matching dynamic range.

"original" is the model from Metashape.
"masks" are the marks showing shadow and non shadow
"deshadow" is the output from delighter
"cameralight", "relight1", "relight2" and some random relightings

Sorry I need to link to these and not attach, but the file size limitations are too low to attach images that effectively represent the images.

13

Texture De-Lighter / Test1

« on: July 08, 2019, 08:45:30 AM »

First example, interesting.
But just realise it is also a multiple light source case.

Suggestion: Really need an undo option when drawing the shadow or non-shadow areas, easy to get it wrong and currently seems one needs to paint over top with opposite state or start again.

Should one paint minimally (as this example) or cover more of the area?

14

Texture De-Lighter / Multiple shadows

« on: July 08, 2019, 07:46:11 AM »

Can't wait to try this out. Shadows are a fact or life in much of the field work I do in remote parts of the world. Any chance of working on models illuminated by multiple lights, in this case 3 dominant ceiling lights?

15

General / Macro 3D reconstruction

« on: July 07, 2019, 03:39:32 PM »

I asked a few questions around this project, so have documented it here for those interested.
    http://paulbourke.net/reconstruction/macro3d/
Objects from 4mm to 20mm, without focus stacking.