Optical Flow

Measure the motion of objects in an image.

Optical Flow Tracking

I remember seeing in the Visual Odometry from scratch tutorial, how they used optical flow to track features, as opposed to using the descriptors.

This idea is also presented in the slambook-en.

The Camera Motion Estimation with that is still the same.

The other way is use optical flow in the direct method.

Implementations with direct method

• LSD-SLAM
• SVO
• DSO