Calculate the capture distance

[Fabien13]

Hello,

Does anyone know how to calculate the capture distance on oblique photos taken by drone when it is a landscape and not a facade?

Thank you

[Paulo]

Hello Fabien,

if you have a 3d Model or dense point cloud as a surface, then for each camera, the distance between camera perspective center and point on model or point cloud would be:

Code: [Select]

chunk = Metashape.app.document.chunk

surface = chunk.point_cloud

chunk.transform.scale * (ps.Vector(camera.center - surface.pickPoint(camera.center,camera.transform.mulp(ps.Vector((0,0,1))))).norm())
Out[21]: 2024-06-25 13:09:12 52.70104912784214

[Fabien13]

Thank you Paulo,

sorry but I need more explanations. How could I use this code?

Best regards.

[Paulo]

Hello Fabien,
In above code camera is a certain camera in chunk.cameras. So in code you could loop thru all cameras in chunk by adding:

Code: [Select]

for camera in chunk.cameras:
    then add code to calculate capture distance