Mean Average Precision

What is mAP?

This one used threshold of object to make the PR curve. This one seem a very good explanation and clearing the doubts about some small competition dependent changes in the definition of mAP.

Understanding the mAP Evaluation Metric for Object DetectionMedium

The one below uses ranking based on confidence score to make the PR cureve.

mAP (mean Average Precision) for Object DetectionMedium

AP is averaged over all categories or/and over different values of IoU. Traditionally, this is called “mean average precision” (mAP).

https://github.com/Cartucho/mAP/blob/master/main.py - Code for MAP