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coco_utils.py
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coco_utils.py
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import mmcv
import numpy as np
from pycocotools.coco import COCO
from pycocotools.cocoeval import COCOeval
from .recall import eval_recalls
def coco_eval(result_file, result_types, coco, max_dets=(100, 300, 1000)):
for res_type in result_types:
assert res_type in [
'proposal', 'proposal_fast', 'bbox', 'segm', 'keypoints'
]
if mmcv.is_str(coco):
coco = COCO(coco)
assert isinstance(coco, COCO)
if result_types == ['proposal_fast']:
ar = fast_eval_recall(result_file, coco, np.array(max_dets))
for i, num in enumerate(max_dets):
print('AR@{}\t= {:.4f}'.format(num, ar[i]))
return
assert result_file.endswith('.json')
coco_dets = coco.loadRes(result_file)
img_ids = coco.getImgIds()
for res_type in result_types:
iou_type = 'bbox' if res_type == 'proposal' else res_type
cocoEval = COCOeval(coco, coco_dets, iou_type)
cocoEval.params.imgIds = img_ids
# 无类别时候使用
cocoEval.params.useCats = 0
if res_type == 'proposal':
cocoEval.params.useCats = 0
cocoEval.params.maxDets = list(max_dets)
cocoEval.evaluate()
cocoEval.accumulate()
cocoEval.summarize()
def fast_eval_recall(results,
coco,
max_dets,
iou_thrs=np.arange(0.5, 0.96, 0.05)):
if mmcv.is_str(results):
assert results.endswith('.pkl')
results = mmcv.load(results)
elif not isinstance(results, list):
raise TypeError(
'results must be a list of numpy arrays or a filename, not {}'.
format(type(results)))
gt_bboxes = []
img_ids = coco.getImgIds()
for i in range(len(img_ids)):
ann_ids = coco.getAnnIds(imgIds=img_ids[i])
ann_info = coco.loadAnns(ann_ids)
if len(ann_info) == 0:
gt_bboxes.append(np.zeros((0, 4)))
continue
bboxes = []
for ann in ann_info:
if ann.get('ignore', False) or ann['iscrowd']:
continue
x1, y1, w, h = ann['bbox']
bboxes.append([x1, y1, x1 + w - 1, y1 + h - 1])
bboxes = np.array(bboxes, dtype=np.float32)
if bboxes.shape[0] == 0:
bboxes = np.zeros((0, 4))
gt_bboxes.append(bboxes)
recalls = eval_recalls(
gt_bboxes, results, max_dets, iou_thrs, print_summary=False)
ar = recalls.mean(axis=1)
return ar
def xyxy2xywh(bbox):
_bbox = bbox.tolist()
return [
_bbox[0],
_bbox[1],
_bbox[2] - _bbox[0] + 1,
_bbox[3] - _bbox[1] + 1,
]
def proposal2json(dataset, results):
json_results = []
for idx in range(len(dataset)):
img_id = dataset.img_ids[idx]
bboxes = results[idx]
for i in range(bboxes.shape[0]):
data = dict()
data['image_id'] = img_id
data['bbox'] = xyxy2xywh(bboxes[i])
data['score'] = float(bboxes[i][4])
data['category_id'] = 1
json_results.append(data)
return json_results
def det2json(dataset, results):
json_results = []
for idx in range(len(dataset)):
img_id = dataset.img_ids[idx]
result = results[idx]
for label in range(len(result)):
bboxes = result[label]
for i in range(bboxes.shape[0]):
data = dict()
data['image_id'] = img_id
data['bbox'] = xyxy2xywh(bboxes[i])
data['score'] = float(bboxes[i][4])
data['category_id'] = dataset.cat_ids[label]
json_results.append(data)
return json_results
def segm2json(dataset, results):
json_results = []
for idx in range(len(dataset)):
img_id = dataset.img_ids[idx]
det, seg = results[idx]
for label in range(len(det)):
bboxes = det[label]
segms = seg[label]
for i in range(bboxes.shape[0]):
data = dict()
data['image_id'] = img_id
data['bbox'] = xyxy2xywh(bboxes[i])
data['score'] = float(bboxes[i][4])
data['category_id'] = dataset.cat_ids[label]
segms[i]['counts'] = segms[i]['counts'].decode()
data['segmentation'] = segms[i]
json_results.append(data)
return json_results
def results2json(dataset, results, out_file):
if isinstance(results[0], list):
json_results = det2json(dataset, results)
elif isinstance(results[0], tuple):
json_results = segm2json(dataset, results)
elif isinstance(results[0], np.ndarray):
json_results = proposal2json(dataset, results)
else:
raise TypeError('invalid type of results')
mmcv.dump(json_results, out_file)