Motion Correspondence

Question 1

What is the Moravec operator?

Answer 1

Place a 3x3 square over a pixel. Move the square in all 8 directions, measuring the intensity variation each time. Local maxima are points of interest (i.e. corners)

Question 2

What are the three principles of motion correspondence?

Answer 2

Discreteness: a measure of the distinctiveness of individual points
Similarity: a measure of how closely two points resemble one another
Consistency: a measure of how well a match conforms with nearby matches