Negative values in bands after calibration image?

[barja8]

Hi community, I have recently been using images from the Phantom 4 multispectral with webodm, however when I perform the ND calibration to surface reflectance values with the :

• Camera
• Camera + sun

I have negative value in the calibration bands, this is very strange because the reflectance value is 0 - 1, correct?
For this process I have been using WebODM Lightning

Finally here put my image set used:

• Set of P4M imagenes

[barja8]

Here an example of the green band

[Saijin_Naib]

Welcome!

Was Piero’s tip on GitHub correct?

[barja8]

Indeed, this error was solved thanks to Piero’s suppo here.
Thanks for everything!

[Saijin_Naib]

Hmm…

I wonder if we might need to revisit the Multispectral preset and maybe include the --texture-skip-global-seam-leveling flag…