What is the purpose of setting capture distance in the reference pane?

[depeurvince]

Hi,

I capture nadir and obliques images (30-45°) during the same flight and process them all together in metashape.

What is the purpose of setting capture distance in the reference pane and which distance should I put, drone height above the ground or the oblique distance according to the angle of the camera?

Does it improve reconstruction or accuracy?

Thanks in advance.

Regards,
Vincent

[JMR]

Hi,

I capture nadir and obliques images (30-45°) during the same flight and process them all together in metashape.

What is the purpose of setting capture distance in the reference pane and which distance should I put, drone height above the ground or the oblique distance according to the angle of the camera?

Does it improve reconstruction or accuracy?

Thanks in advance.

Regards,
Vincent

Hi Vincent: I guess it is required to estimate the overlap with oblique images. it will tell Metashape if two images will actually overlap or not. if they do not, why should we try to find matches?
If the value is left blank, Metashape will ignore shoting angles. So is part of the reference preselection strategy and can reduce alignment times. I don't think it can change anything in terms of accuracy directly, but if it is entered wrong, it can lead to some images not aligned or to a less robust structure because some links may be ignored.

[depeurvince]

Hi,

Thank you for your reply, I never set the capture distance and the alignment process is still pretty fast compare to other steps.

I will check if I can see any improvements using this option.

Regards,
Vincent