Messages

1

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.

2

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,

3

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?

4

General / Re: Building texture from Orthomosaic

« on: July 08, 2021, 01:12:52 PM »

Alexey, to your suggestion, that is what I believe I have done so far. Won't that approach only give me a texture at the resolution of the mesh vertices.
As it happens my point cloud, and orthotif image, are orders of magnitude higher resolution than any mesh I could contemplate building.
Or have I misunderstood?

5

General / Re: Building texture from Orthomosaic

« on: July 07, 2021, 06:11:41 AM »

Related to this. Once I have my mesh (which is lower resolution than my point cloud) why can't I derive a texture image from the dense point cloud colours. I only seem to have the option of deriving it from the mesh vertex colours.

6

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.

7

General / Depth maps

« on: September 10, 2020, 10:11:50 AM »

Relatively surprised the depth maps, as exported, are only 8 bit.
Is that correct, are they only 8 bit internally also? Seems highly quantised if so.

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 / Re: Best Camera Choices for a rig - budget cameras?

« on: August 29, 2019, 10:44:22 AM »

I recently did this
     http://paulbourke.net/reconstruction/humanscan2/
Used Canon EOS 1500D, 24MPIxels, working great.

11

Face and Body Scanning / Re: Max cameras per computer over USB

« on: August 29, 2019, 10:41:58 AM »

I recently did this
     http://paulbourke.net/reconstruction/humanscan2/
Used 3 x 20 ports USB hubs from SIPolar.
     http://www.sipolar.com/page172.html?product_id=13
But I'm on Apple, MacBookPro.
Not mounting the the cameras as mass storage but using PTP, there are some nice libraries like gphoto2 for dealing with these.

12

Face and Body Scanning / Re: What's the best way to trigger an array of EOS cameras?

« on: August 29, 2019, 10:39:01 AM »

I recently did this
     http://paulbourke.net/reconstruction/humanscan2/
Contact closure trigger from PureMoCo
     http://www.puremoco.com

13

Face and Body Scanning / Re: Esper Triggerbox + Smartshooter ?

« on: August 29, 2019, 10:35:51 AM »

I recently did this
     http://paulbourke.net/reconstruction/humanscan2/
3 x 20 ports USB hubs from SIPolar.
     http://www.sipolar.com/page172.html?product_id=13
Contact closure trigger from PureMoCo
     http://www.puremoco.com
Custom software from myself based upon gphoto2 running over the USB based PTP mounted cameras to delete, copy images from the cameras.
     http://www.gphoto.org/doc/manual/

14

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/

15

General / Re: Is it possible to modify the texture by "unrendering"?

« on: July 14, 2019, 04:48:58 AM »

It is possible to project an image (your rendering) onto a 3D model. Except, in general the rendered image does not contain enough texture information, so when projected onto the model there will be parts untextured ... specifically those not visible from the rendering camera position.