Adding constrains to camera position

[Blastam20]

Hi,
I've taken several images of an object and I want to create a 3d model with correct measures of the object.
I took the images with two camera which i placed directly one above the other - 10cm apart and I walked around the object and took photos simultaneously with both cameras.
I don't know the (x,y) positions of the cameras in the photos i took but i know that the difference in their z coordinant is constant and equals to 10 cm. is there a way i can enter this position/distance constrain and obtain exact 3d model ?
As for know i can only add this information as distance constrain between the two cameras after the sparse reconstruction, the problem is that sometimes although the cameras were exactly above each other, in the reconstruction some of the camera positions appear as they had been taken in different (x,y) positions (not exactly above each other).
I'd be grateful if somebody could help,
Thanks

[Andrea Alessi]

Hi Blastam,

from the information you have, it looks like you can only use the distance you have to rescale the world.

Are you using a fixed rig with multiple cameras? If so, you can pre-calibrate your rig and the use the "load photos with known parameter" functions in order to skip the orientation phase. Otherwise, if you have x,y,z position of each camera (i.e. from a GPS) you can use them as camera constraints in the project wizard.

If you have more details/any questions feel free to ask!

[Blastam20]

where is that option located?

[Andrea Alessi]

File -> Load Photos with known parameters

You need to know both internals and externals though, so the pre-calibration of the shooting rig is mandatory.

[kailasnaga1]

Yo can try this:

deltaPos = new Vector3(oldPos.x - pos.x, oldPos.y - pos.y, oldPos.z - pos.z);

Vector3 newPos = cam.transform.position + deltaPos;

Vector3 newPosClamped = new Vector3(Mathf.Clamp(newPos.x, minX, maxX), Mathf.Clamp(newPos.y, minY, maxY), Mathf.Clamp(newPos.z, minZ, maxZ));

cam.transform.position = newPosClamped;

[Andrea Alessi]

Wow, bots are evolving