A dummy question: Can monocular SLAM provide scale information?

hanmekim / SceneLib2

SceneLib2 is an open-source C++ library for SLAM originally designed and implemented by Professor Andrew Davison at Imperial College London.

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A dummy question: Can monocular SLAM provide scale information? #14

Closed somebodyus closed 8 years ago

somebodyus commented 8 years ago

A dummy question:

Can monocular SLAM provide scale information?

ahundt commented 8 years ago

I don't think any multiple view geometry system can derive scale without some physical reference object or scale provided from outside. Just had an exam on that yesterday so I'm no expert but I think I'm answering correctly.

hanmekim commented 8 years ago

Unlike RGB-D or stereo, the absolute scale of the world cannot be recovered by monocular SLAM -- all geometrical metric units are only defined up to scale.