( 참고 : 패스트 캠퍼스 , 한번에 끝내는 컴퓨터비전 초격차 패키지 )
Additional Object Detection Techniques
1. FPN (Feature Pyramid Network)
Challenge in Object Detection :
\(\rightarrow\) vastly DIFFERENT SCALES
Previous Solutions :
- ex 1) Image Pyramid
- ex 2) Feature Hierarchy
FPN (Feature Pyramid Network)
( Lin et al., Feature Pyramid Networks for Object Detection, CVPR 2017 )
-
add skip connections between each level!
- similar speed as Feature Hierarchy
- Feature Pyamid » Image Pyramid
Variations of Feature Pyramid
2. PANet (Path Aggregation Network)
( Path Aggregation Network for Instance Segmentation, Liu et al., CVPR 2018 )
PANet = top-down path of FPN + bottom-up path
3. EfficientDet
( EfficientDet: Scalable and Efficient Object Detec`on, Tan et al., CVPR 2020 )
Efficient Model Search
By using BiFPN structure, propogate both
- (1) top-down info
- (2) bottom-up info
