1. Object detection

• Semantic segmentation
• Instance segmentation
• Panoptic segmentation

1-1. What is Object detection

• Object detection
  • Classification + Box localization

2. Two-stage detector

2-0. Traditional hand crafted techniques

• SVM, HOG
• Selective Search

2-1. R-CNN

2-2. Fast R-CNN

2-3. Faster R-CNN

• Time consuming selective search → Region proposal network(RPN)

3. One stage detector

3-0. Comparison with two-stage detector