Convert camera coordinates to real-world coordinates?

VihrenDanov

Hello everybody, i have a oak-d lite with which i am trying to get the real world coordinates of an object that is in front of the camera and just can't seem to find a working example of it. So I'm curious if anyone has utilized a method within the DepthAI API or if someone has made such a method or something like that before? Thanks in advance.

jakaskerl

Hi VihrenDanov
Have you tried the following examples:

Thanks,
Jaka

VihrenDanov

hey
yes, unfortunately i did but they where wrong.

i tried all of those but none of them seem to give me the right values so i was wondering if there are other ways or if i needed to do some kind of camera configuration/calibration before running the code and it gave me wrong values because of that.
Thanks.
Vihren

jakaskerl

Hi VihrenDanov
Technically, you don't need to recalibrate anything since you are using a compact device, which has been factory calibrated.
Could you post some screenshots of the spatial location calculator example? I want to see how bad the depth is compared to ground truth and this is the simplest example to tell. Is it off by a few percent or is it more?

Thanks,
Jaka

VihrenDanov

jakaskerl

the actual depth is 60cm, as i go further(meaning the objects are further and further from the camera) the error in the distance gradually grows. I tested every single example that said depth or coordinate in the experiments folder in the depthai repo but non seem to be right.

jakaskerl

Hi VihrenDanov
Seems like bad depth in general (the image looks noisy).
In this case I'd suggest recalibrating the device (https://docs.luxonis.com/projects/hardware/en/latest/pages/guides/calibration/).

Thanks,
Jaka