Absolute depth and coordinate system

[rimu123]

Thank you for your contribution, I have some questions, does the depth of this paper refer to the absolute depth, if it is absolute depth, is the coordinate system the camera coordinate system, and how to return the three-dimensional point under the camera coordinate system according to the depth and internal \ external parameters

[MichaelWangGo]

I think the DepthAnything produces relative depth estimation instead of absolute depth.

[LiheYoung]

Hi @rimu123, as @MichaelWangGo said, the basic Depth Anything models produce relative depth information. However, if you want to obtain absolute depth, you can follow this directory. The output value can be considered as meters.

[Nimisha-Pabbichetty]

@LiheYoung How do we convert the relative depth to absolute depth? I'm assuming we'll have to do the reverse of the shift and scale alignment you do?

[akebest]

I have a question: Why can monocular images produce absolute depth, given that they lack stereoscopic vision and reference objects with known sizes? Has the reliability of their absolute depth been tested?"

[Denny-kef]

@akebest I assume that the network is learning to reference semantic classes with their ground truth size ranges during it's training.