Review of Optical Flow Estimation

Optical flow has application in object division, object recognize, object tranjactory and etc.

Criterion Standard
Precision: concentrate in small region not a large range.
Universalism: using in most of scenery.
Robustness: not be sensitive to noise.
Computation Complexity: be fast.

Methods
Differential equation:
(This method is bad especially in violent motion scenery. As this method is based on the hypothesis that luma is unchanged)

Matching
Block matching in a window based on the hypotheses that object just has position moving. Using SSD to calculate the matching.

Energy Based method

Phase Based Method

Neuronal Networks
I dont know…