How to supplement single point feature? about borderdet

[Maycbj]

1. As shown in the figure below. On the one hand, the bounding box of the human depends on the border of it(extreme point), on the other hand, do we really need to extract the whole region feature to enhance the single point feature?
2. Following the motivation, we suspect that extracting extreme point boundary point features may be important for box localization. So we compare the perfomance of the region feature, border feature and middle point of the border feature.
   

[oliverxudd]

thanks for the clarification!