Fast COCOApi for COCO bbox task

This repository just copy and paste PythonAPI from the official cocoapi, merge the C++ implementation of COCOeval in detectron2 into FastCOCOeval. Simplify all unnecessary requirements and make it easy to install.

Installation

• Install from local:

  git clone https://github.com/imyhxy/ccocotools
  cd ccocotools && python setup.py install

• Install from Github:

  pip install git+http://github.com/imyhxy/ccocotools

Usage

from ccocotools.coco import COCO
from ccocotools.fastcocoeval import FastCOCOeval

gt_json = 'instance_val2017.json'
pd_json = 'predictions.json'

anno = COCO(gt_json)
pred = anno.loadRes(pd_json)
coco_eval = FastCOCOeval(anno, pred, 'bbox')
coco_eval.evaluate()
coco_eval.accumulate()
coco_eval.summarize()

Performance

The C++ implementation reduces 75% total time compares to the python one.

Implementation	evaluate()	accumulate()	summarize()	Total
Python	73.0s	15.4s	3.6ms	92.0s
C++	16.4s	2.5s	3.9ms	22.8s

Reference

• cocoapi
• detectron2