Messages

1

General / Re: Custom Geoid

« on: April 28, 2025, 11:43:18 AM »

I was sure Affinity Photo was able to open 32 bit files, but this it's only for RGB. GIMP (with a Contrast filter) is able to open the image format and look okay (also QGis of course open it correctly)
So would be better to stay with 1.8 until the bug is fixed or is already there a workaround for v2.x?

2

General / Re: Custom Geoid

« on: April 27, 2025, 08:09:50 PM »

Hi,

Thanks a lot for your reply,

I tried both v2.0.3 and v2.2.0, but the result is the same.

The generated TIFF file is very strange, when opened with Affinity Photo looks like something is scrambled (see attached)

Thanks

3

General / Custom Geoid

« on: April 27, 2025, 04:19:29 PM »

I have created a custom metashape geoid for Italy (ITG2009) from a file that can be found here https://www.isgeoid.polimi.it/Geoid/Europe/Italy/public/ITG2009_20170606.isg

After that, Metashape created a TIFF file in the geoids folder that seems completely white (attached), but If I open the .isg file in QGIS, it look fine (see attached screenshoot).

Am I missing something? Is Metashape compatible with .isg files?

I'm really trying to use this local geoid because from my understanding EGM2008 is 1' while this is 0.025 degree so much more accurate

4

General / Re: Howto - Heuristic 3D reconstruction

« on: April 11, 2025, 12:30:01 PM »

This is a job for a CAD like Fusion 360

5

General / Re: combine Iphone depth and rgb video data in Agisoft

« on: August 05, 2024, 12:14:31 AM »

Can you take pictures instead of video and try again? Would be much easier. For video you probably need to write some custom converter software and it's very expensive

6

General / Re: combine Iphone depth and rgb video data in Agisoft

« on: August 04, 2024, 04:37:39 PM »

convert rgb and depth to standard images and then import them in metashape

7

General / Re: Correct way to maximise processing speed?

« on: July 22, 2024, 11:35:06 PM »

In my experience the best way is to process valuable data only. For example if you have a 48MP drone, optical resolution may be lower. In this case resizing images to a smaller size may bring the same information and can be much faster to process. Same with out-of-focus area, they don't bring information, so few stacked images are better than many non-stacked images. Some thing for colors.. an object is black and white? Then you don't need colors at all, grayscale will be much faster.

After this there is another level of optimization that involve multiple machine, etc.. but I always prefer to reduce the data first to valuable data only.

8

General / Re: Do you need to "focus stack" your photos if you need a high quality asset?

« on: July 12, 2024, 02:49:47 AM »

For shoes and high quality you definitively need focus stacking so you can use the best lens aperture (ex. f5.6).

My advices:
- Use a rotating table (a manual one is fine too)
- Use a very black background (ex. Musou Black fabric)
- Merge photo with Helicon Focus or a similar software
- Automate Focus Bracketing to avoid unwanted movements

Processing time of all-focused pictures is much faster, because software hasn't to deal with alignment errors.

9

General / Re: focus stacking for photogrammetry

« on: July 12, 2024, 02:45:14 AM »

From my experience there is a big advantage in:
- 3d model details (shooting at f5.6 avoid diffraction errors)
- alignment (no blurry area that leads to alignment issues)
- processing time (aligment is faster because easier with more complete data)

With a Sony camera the process can be very long because there isn't a focus bracketing built-in in many models.
You can use an external app for this, please have a look here

https://www.youtube.com/watch?v=_6fA7urT3VY

for a comparison and a workflow idea.

10

General / Rain simulation

« on: March 13, 2024, 02:37:13 AM »

Hello dear Metashape users,

I was thinking to simulate how water flow on a steep terrain.

Let's say I have the 3D model and the DEM, what's next to do a 3d simulation?

- What software are you using?
- How are you modelling soil water absorption?
- What else are you considering for such simulations?

Thanks all

11

General / Re: 3D Coordinates of image(s) footprint corners added on image EXIF data

« on: March 07, 2024, 12:21:46 AM »

Hi tazzo,

Thanks for your participation, before all.
I mean that every corner of each picture (from drone camera as example) has 3D coordinates when you project these corners on the ground (terrain). For every corner - I mean on each corner for each image: bottom left, bottom right, upper left and upper right corner.

Don't know about that, but I found similar request on this forum but unfortunatelly without right (or outdated) solutions.

Thanks!

J.K.

Be careful because border is often discarded due to distortion compensation, would be more "accurate" to do this on rectified images instead of source images.

12

General / Re: 3D Coordinates of image(s) footprint corners added on image EXIF data

« on: March 06, 2024, 01:00:23 AM »

do you mean geographic coordinates of an orthomosaic image? should be already a geo-tiff

13

General / Re: Can someone make script to create plane from selected 3 markers?

« on: March 06, 2024, 12:55:50 AM »

you don't have to do this, just assign coordinates of your markers and the position can be automatically updated

14

Camera Calibration / Re: A better way to calibrate cameras

« on: February 12, 2024, 03:14:43 AM »

This is done by scale bars, you have two markers with a fixed distance

15

General / Re: Capturing depth data using iPhone LiDAR

« on: February 10, 2024, 03:01:11 AM »

Some people were using it to scan caves where is not practical to bring mirrorless or laserscanner