Yes—this is possible in principle, and it falls under photogrammetry. By taking images from different camera positions and measuring how an object’s apparent size or position changes, you can estimate distance using geometry.

However, you generally need some other known information to solve the problem reliably. In practice, that usually means knowing things like the object’s real size, the distance moved, camera calibration, or other scene geometry. If you want to determine distances between objects, knowing their actual sizes is often necessary.

So the core idea is valid, but it is not completely “camera independent” unless enough other variables are known or calibrated. Focal length and perspective do matter unless they are fixed or accounted for.

In short: yes, your approach is viable as a photogrammetry problem, but you need known reference information to turn pixel measurements into real-world distances.