Difference between optical flow field and motion field?

1. What is the difference between motion field and optical flow?
2. What is optical flow field?
3. How does motion influence optic flow?
4. What is optical flow on a drone?

What is the difference between motion field and optical flow?

Motion Field: projection of 3D relative velocity vectors onto the 2D image plane. Optic Flow: observed 2D displacements of brightness patterns in the image.

What is optical flow field?

Optical flow fields comprise not only information about the relative displacement of image points but also about the spatial structure of the recorded scene. Several investigations in the literature show how these two-dimensional fields can be interpreted to infer information about the three-dimensional environment.

How does motion influence optic flow?

Speed of observer's movement. The optic flow will increase if the observer moves faster and they will perceive faster movement. Distance from focus of expansion. Optic flow is at its greatest speed when further away from the focus of expansion.

What is optical flow on a drone?

“Optic flow is the apparent motion of objects caused by your own motion; as you descend to the ground a downward-pointing camera will see objects on the ground looming larger as it approaches them,” he explained.