Optical Flow
[Motion Field](https://texonom.com/motion-field-3d17a0f9afbc4d69abdbf5534a9fb423) 


### 이미지에서 밝기 패턴의 표면적인 움직임을 나타내는 것
Cannot compute any motion from flat area
### Key Assumption
- Bright constancy
- Small motion
- Spatial coherence
solving spatial coherence constraint
[Barberpole Illusion](https://texonom.com/barberpole-illusion-acbdf14bbb124ccd911508b65a6bfa12) 때문에 [Corner Detection](https://texonom.com/corner-detection-36dc7afee7414060bd66c1003898836e) is better
### Optical Flow Notion
|Title|
|:-:|
|[brightness constancy constraint](https://texonom.com/brightness-constancy-constraint-840f53954f294625afd1b8256761d46f)|
|[spatial coherence constraint](https://texonom.com/spatial-coherence-constraint-d02be2bb9da14f29b9f1dc98ad8f8060)|
|[Lucas-Kanade flow](https://texonom.com/lucas-kanade-flow-d83aa4a4173d4c18ba79859350e11315)|




> [옵티컬 플로우 (Optical Flow) 알아보기 (Luckas-Kanade w/ Pyramid, Horn-Schunck, FlowNet 등)](https://gaussian37.github.io/vision-concept-optical_flow/)





