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Messages - mdasilva

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1
In the version 1.8.4 (pre-release of build 14465 is already available via direct link) it would be possible to select the rolling shutter compensation mode in Camera Calibration dialog from the following options:
- disabled,
- XY regularized (default, as in 1.8.3 without tweaks),
- Full.

Hi Alexey,
I'm not able to follow what you are saying. Could you please help me understand?

Is 1.8.4 released? Does it do something different to 1.8.3 in regards to Camera Calibration? Or have you just added an option to apply it within Optimize Camera Alignment?

thanks

Hi,
Bumping this to try to get some clarity on this.

2
In the version 1.8.4 (pre-release of build 14465 is already available via direct link) it would be possible to select the rolling shutter compensation mode in Camera Calibration dialog from the following options:
- disabled,
- XY regularized (default, as in 1.8.3 without tweaks),
- Full.

Hi Alexey,
I'm not able to follow what you are saying. Could you please help me understand?

Is 1.8.4 released? Does it do something different to 1.8.3 in regards to Camera Calibration? Or have you just added an option to apply it within Optimize Camera Alignment?

thanks

Hi,
Bumping this to try to get some clarity on this.

3
If you check all the boxes when you align or optimize cameras, will that take care of the skew from rolling shutter? And what if all your photos don't have rolling shutter? Will they all get the same calibration and get messed up if you have a few rolling shutter pictures in your set?

I shoot manually in raw, not with an automated flight program. Sometimes I end up with a few photos where I didn't let the drone stop fully

Hi,
I've been experimenting for weeks with different camera optimisation parameters. It seems like the RS correction is causing the other optimisation parameters to go absolutely haywire.

The drone that I used, Mavic 2 Pro, has an electronic shutter (rolling shutter) so it is recommended to use the correction.

4
Camera Calibration / Re: Camera Calibration using Mavic 2 Pro
« on: June 02, 2022, 06:04:49 AM »
HI

I have a question related to the same topic.
I have a Mavic 2 pro and Agisoft standard and i am trying to follow the process to get a 3D model of a field.
When i start to allign the pictures all the time i get the same strange result.
The shape of the field is curved.
Mavic 2 suffer of rolling shutter and so i tried to activate the rolling shutter compensation in camera allignement but the result is worse.
I attach some screenshot.
Someone can help me to have a right setup for this drone?

thanks a lot

Hi @Davidedts
@Alexey
@nagalakshmi,
Did you ever resolve the issue with this? I too am having lots of issues with M2Pro and the rolling shutter compensation.

5
In the version 1.8.4 (pre-release of build 14465 is already available via direct link) it would be possible to select the rolling shutter compensation mode in Camera Calibration dialog from the following options:
- disabled,
- XY regularized (default, as in 1.8.3 without tweaks),
- Full.

Hi Alexey,
I'm not able to follow what you are saying. Could you please help me understand?

Is 1.8.4 released? Does it do something different to 1.8.3 in regards to Camera Calibration? Or have you just added an option to apply it within Optimize Camera Alignment?

thanks

6
Unfortunately not!

Tweaks are a little mystery that would really need a better documentation....

Thanks Paulo, I really don't understand how Agisoft hasn't addressed this in its documentation. From what I can tell, Rolling Shutter Compensations (RSC) are NOT being applied to z coordinates (unless with additional Tweaks that are not listed or documented anywhere). Across the internet I'm seeing people saying to not use RSC if their data looks better without it, which essentially means people are producing models/3d data without RSC because the software is such a black box (even though their camera specification is a rolling shutter camera).

I'm probably going to make a fresh post addressing this soon, no idea how to be confident I'm using the optimised settings for the software otherwise.

7
Python and Java API / Re: List of Tweaks ?
« on: May 28, 2022, 09:43:20 AM »
Bumping this thread. Where can one find more information on Tweaks?

8
hi mdasilva,

yes the tweaks are set in Tools Menu/Preferences. In Advanced tab you will see a  Tweaks button, click and there you set the tweaks...as in capture screen below

Thank you! The learning curve of this software is driving me crazy. I've been processing/re-processing for months now trying to optimise all the settings and understand what they do.

Any chance you've got a link to where one finds other available Tweaks?

9


Now if you want to use full compensation model (6 parameters) then you can use following tweaks (since version 1.8 ) :
Quote
You need to use 2 tweaks for rolling shutter algorithm:
"AlignCameras/full_shutter_model = True"
"OptimizeCameras/full_shutter_model = True"



Could you clarify how you apply these? I don't see full_shutter_model within the Python API nor the Metashape guide, so not sure how to do this. My z error estimatesare horrendous after reprocessing with the Rolling Shutter Compensation.

thanks

10
General / Re: Possible rolling shutter effect
« on: May 28, 2022, 05:13:20 AM »
Hello, Was wondering if you investigated this more and to what conclusions you came to.

I'm using a Mavic 2 Pro in the newest version of Agisoft and when I enable the rolling shutter compensation the Z errors are getting a whole heap worse.

cheers

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