Forum

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - 3DWinter

Pages: [1] 2 3 ... 7
1
General / Camera calibration Initial parameters
« on: March 16, 2023, 12:29:33 AM »
Hello Alexey and Metashape support,
I searched the Metshape manual and the forum, but I cannot find where/how Metashape comes up with the camera initial parameters.
For example, with the DJI Phantom 4 RTK, the focal length in pixels in the XMP file is 3666, but Metashape used 2840!
Looking at both the XMP and EXIF files, I have not found other camera calibration parameters. So where do these parameters come from? I don't think they are from a previous processing project or are they? Does Metshape download from an online library of camera parameters?

Thanks for this clarification!

2
Thanks Marius, that is a creative solution!

Metashape team, or anyone else, is there no proper way to close to the project so it can be opened later to read and write?
Thanks

3
Python and Java API / Re: Proper method to close project via python API
« on: February 25, 2023, 04:30:01 AM »
Hello,
Almost two years ago, it seemed like I had a bandaid to closing a Metahsape project processed completely with Python API.
The last two code lines are:
Code: [Select]
Doc.save()
Metashape.Document()
Yet,
1. If I open with the GUI I  get a message
             The project is opened in read-only mode because it is already in use by DESKTOP.... or was not closed
             properly. Do you want to edit it anyway?
2. If I open the existing project with python API I cannot save the changes
Code: [Select]
OSError: Document.save(): editing is disabled in read-only mode
So what am I doing wrong at the end of my python code after finishing processing?

4
Python and Java API / Re: Exporting cameras with errors and projections
« on: February 14, 2023, 09:35:04 AM »
Can anyone help with this?

5
Python and Java API / Re: Exporting cameras with errors and projections
« on: February 10, 2023, 10:58:09 PM »
Anyone's thoughts?

6
General / Re: Correlation matrix
« on: February 10, 2023, 02:30:20 AM »
Alexey,
Was the correlation matrix added to the python API since this last post?

What is the matrix below the parameters in
Code: [Select]
calibration.save()?
Thanks

7
Python and Java API / Re: Exporting cameras with errors and projections
« on: February 10, 2023, 12:57:24 AM »
According to Methsape Python API 2.0
Renamed Chunk.saveReference() method to Chunk.exportReference()

Below is my code to try to export the reference.
Code: [Select]
chunk.exportReference(path=pathi,format=Metashape.ReferenceFormatCSV,items=Metashape.Reference, columns='',delimiter=',', precision=6)
But I am not successful in exporting the projections and Error (pix) associated with each picture :(  Can someone help me?

8
General / Turning off Mapbox
« on: September 26, 2022, 09:52:51 PM »
Hello Agisoft support and  the forum,
It seems when I let Metashape Pro stay on and then the wifi connection is disconnected get a Mapbox error:
Code: [Select]
Error: Error transferring https://api.mapbox.com/v4/mapbox.satellite
The problem with this error is that makes the Metashape GUI all messed up and sometimes hard to work with.
Is there a way to disable the Mapbox when working offline?
When working in the same area over and over, can I cache the Mapbox map for that area of interest?
Thanks

9
General / Re: Non-coded cross targets automatic detection failure
« on: September 20, 2022, 10:14:03 PM »
Thanks for that.
Do you know what is "Tolerance" and "Maximum Residual (pix)"? And, do you adjust these parameters?
Thanks

10
General / Re: Non-coded cross targets automatic detection failure
« on: September 20, 2022, 04:14:21 AM »
Hello Jansawicki,
Have you learned anything new regarding more reliable automatic non-targets best practices?
Thanks

11
General / Re: Optimal size non-coded targets
« on: September 20, 2022, 03:59:42 AM »
I think it would be beneficial if Agisoft added best practices.

12
General / Non-Coded targets automatic detection
« on: September 20, 2022, 03:56:40 AM »
Hello,
The two examples of Non-coded targets (seen in the attachment) are black and white with a black edge.
I have a few questions:
1. Does the algorithm care for color?
2. I assume the black edge is not critical, or is it!?
3. What is the definition of "Tolerance"?
4. What is the definition of Maximum Residual (pix)?
Thanks

13
Python and Java API / Re: Marker Detection - Image Scale
« on: September 20, 2022, 03:43:34 AM »
This is a cool revelation. I wonder if the automatic detection is sensitive to a specific geometry size/ resolution!?

14
@w28 or @Alexey,
Can one of you shed light on what sigma0 stands for and how is it calculated? I see that it is OptimizeCameras/sigma0. So does sigma0 represent the standard deviation of the camera parameters (f,cx,cy,k1,k2,k3) in pixels?

How do I interpret this value?
[/code]

Code: [Select]
2022-07-27 10:25:07 adjusting: xxx- 0.743908 -> 0.449964
Thanks

15
Python and Java API / Dense point cloud attributes
« on: July 15, 2022, 04:50:21 AM »
Hello Agisoft support,
chunk.point_cloud  (sparse point cloud) appears an easy class to interact with.
For example, I can iterate with point in "chunk.point_cloud.points" and then get various attributes for each point. Some of those attributes are the track_id, coord, and cov.

I did not find in the Metashape python API manual if I could iterate through all the points in the dense_cloud to get point attributes: point_id,  and confidence for example. 
Is there a way to iterate through all the dense cloud points to extract point attributes?
Thanks

Pages: [1] 2 3 ... 7