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Messages - aag_frei

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1
General / Re: Placing markers increase camera erros after calibration
« on: July 23, 2021, 05:34:54 PM »
Hi! Thank you for your help! It actually works perfectly fine when I align the cameras at lowest accuracy. However, the problem persists when i align the pictures at high accuracy.

General setup:
-DJI Mavic 2 Pro, Camera calibration f fixed, in the Reference Pane Yaw, Pitch and Roll fixed to 20, 0, 0 (because it adds some strange values for yaw if I don't set it up manually).
-14 GCPs, measured with a Leica dGNSS via Sapos.
-Reference Accuracy: Markers 0.1m, Cameras 4m and 10°.

Workflow:
1. Add images to chunk, fix Yaw (20, from our flight plan), Pitch (0 - straight down?), Roll (0).
2. Fix f in camera calibration (4256).
3. Add & place markers.
4. Align photos with/without markers checked (I tried both, but both results in high errors). Without markers, only the cameras, the error for the cameras is fine. When checking the markers and actualizing, the errors of the cameras increase.
5. Optimize cameras... but same error.

Attached screenshots:
1. Reference pane without markers
2. Reference pane with markers
3. Errors without markers
4. Errors with markers


2
General / Placing markers increase camera erros after calibration
« on: July 22, 2021, 05:12:32 PM »
To whom it may concern,

I have several data set of pictures taken with a DJI drone at different heights and dates which I add to the project and have an acceptable error. However, as soon as I place the markers and optimize allignment, the cameras error rockets.

I have tried fixing the f value in the camera calibration menu since in the adjusted tab it was twice what it was in the initial tab, but that did not help.

Does anyone know why does that happen and how to fix it?

Thank you in advance!

3
To whom it may concern,

I have several data set of pictures taken with a DJI drone at different heights and dates which I add to the project and have an acceptable error. However, as soon as I place the markers and optimize allignment, the cameras error rockets.

I have tried fixing the f value in the camera calibration menu since in the adjusted tab it was twice what it was in the initial tab, but that did not help.

Does anyone know why does that happen and how to fix it?

Thank you in advance!

Pages: [1]