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coco_video_dataset.py
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coco_video_dataset.py
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import random
import mmcv
import numpy as np
from mmdet.datasets import DATASETS, CocoDataset
from pcan.core import eval_mot, eval_mots
from .parsers import CocoVID
@DATASETS.register_module()
class CocoVideoDataset(CocoDataset):
CLASSES = None
def __init__(self,
load_as_video=True,
match_gts=True,
skip_nomatch_pairs=True,
key_img_sampler=dict(interval=1),
ref_img_sampler=dict(
scope=3, num_ref_imgs=1, method='uniform'),
*args,
**kwargs):
self.load_as_video = load_as_video
self.match_gts = match_gts
self.skip_nomatch_pairs = skip_nomatch_pairs
self.key_img_sampler = key_img_sampler
self.ref_img_sampler = ref_img_sampler
super().__init__(*args, **kwargs)
def load_annotations(self, ann_file):
"""Load annotation from annotation file."""
if not self.load_as_video:
data_infos = super().load_annotations(ann_file)
else:
data_infos = self.load_video_anns(ann_file)
return data_infos
def load_video_anns(self, ann_file):
self.coco = CocoVID(ann_file)
self.cat_ids = self.coco.get_cat_ids(cat_names=self.CLASSES)
self.cat2label = {cat_id: i for i, cat_id in enumerate(self.cat_ids)}
data_infos = []
self.vid_ids = self.coco.get_vid_ids()
self.img_ids = []
for vid_id in self.vid_ids:
img_ids = self.coco.get_img_ids_from_vid(vid_id)
img_ids = self.key_img_sampling(img_ids, **self.key_img_sampler)
self.img_ids.extend(img_ids)
for img_id in img_ids:
info = self.coco.load_imgs([img_id])[0]
if len(info['file_name'].split('/')) > 2:
replace_token = info['file_name'].split('/')[0] + '/' + info['file_name'].split('/')[1] + '/'
info['file_name'] = info['file_name'].replace(replace_token, info['file_name'].split('/')[0] + '/')
info['filename'] = info['file_name']
data_infos.append(info)
return data_infos
def key_img_sampling(self, img_ids, interval=1):
return img_ids[::interval]
def ref_img_sampling(self,
img_info,
scope,
num_ref_imgs=1,
method='uniform'):
if num_ref_imgs != 1 or method != 'uniform':
raise NotImplementedError
if img_info.get('frame_id', -1) < 0 or scope <= 0:
ref_img_info = img_info.copy()
else:
vid_id = img_info['video_id']
img_ids = self.coco.get_img_ids_from_vid(vid_id)
frame_id = img_info['frame_id']
if method == 'uniform':
left = max(0, frame_id - scope)
right = min(frame_id + scope, len(img_ids) - 1)
valid_inds = img_ids[left:frame_id] + img_ids[frame_id +
1:right + 1]
ref_img_id = random.choice(valid_inds)
ref_img_info = self.coco.loadImgs([ref_img_id])[0]
ref_img_info['filename'] = ref_img_info['file_name']
return ref_img_info
def ref_img_sampling_test(self,
img_info,
num_ref_imgs=1,
method='uniform'):
if num_ref_imgs != 1 or method != 'uniform':
raise NotImplementedError
if img_info.get('frame_id', -1) <= 0:
ref_img_info = img_info.copy()
else:
vid_id = img_info['video_id']
img_ids = self.coco.get_img_ids_from_vid(vid_id)
frame_id = img_info['frame_id']
'''
if method == 'uniform':
left = max(0, frame_id - scope)
right = min(frame_id + scope, len(img_ids) - 1)
valid_inds = img_ids[left:frame_id] + img_ids[frame_id +
1:right + 1]
ref_img_id = random.choice(valid_inds)
'''
ref_img_id = img_ids[frame_id - 1]
ref_img_info = self.coco.loadImgs([ref_img_id])[0]
ref_img_info['filename'] = ref_img_info['file_name']
return ref_img_info
def _pre_pipeline(self, _results):
super().pre_pipeline(_results)
_results['frame_id'] = _results['img_info'].get('frame_id', -1)
def pre_pipeline(self, results):
"""Prepare results dict for pipeline."""
if isinstance(results, list):
for _results in results:
self._pre_pipeline(_results)
elif isinstance(results, dict):
self._pre_pipeline(results)
else:
raise TypeError('input must be a list or a dict')
def get_ann_info(self, img_info):
"""Get COCO annotation by index.
Args:
idx (int): Index of data.
Returns:
dict: Annotation info of specified index.
"""
img_id = img_info['id']
ann_ids = self.coco.get_ann_ids(img_ids=[img_id], cat_ids=self.cat_ids)
ann_info = self.coco.load_anns(ann_ids)
return self._parse_ann_info(img_info, ann_info)
def prepare_results(self, img_info):
ann_info = self.get_ann_info(img_info)
results = dict(img_info=img_info, ann_info=ann_info)
if self.proposals is not None:
idx = self.img_ids.index(img_info['id'])
results['proposals'] = self.proposals[idx]
return results
def match_results(self, results, ref_results):
match_indices, ref_match_indices = self._match_gts(
results['ann_info'], ref_results['ann_info'])
results['ann_info']['match_indices'] = match_indices
ref_results['ann_info']['match_indices'] = ref_match_indices
return results, ref_results
def _match_gts(self, ann, ref_ann):
if 'instance_ids' in ann:
ins_ids = list(ann['instance_ids'])
ref_ins_ids = list(ref_ann['instance_ids'])
match_indices = np.array([
ref_ins_ids.index(i) if i in ref_ins_ids else -1
for i in ins_ids
])
ref_match_indices = np.array([
ins_ids.index(i) if i in ins_ids else -1 for i in ref_ins_ids
])
else:
match_indices = np.arange(ann['bboxes'].shape[0], dtype=np.int64)
ref_match_indices = match_indices.copy()
return match_indices, ref_match_indices
def prepare_train_img(self, idx):
"""Get training data and annotations after pipeline.
Args:
idx (int): Index of data.
Returns:
dict: Training data and annotation after pipeline with new keys \
introduced by pipeline.
"""
img_info = self.data_infos[idx]
#print('img info:', img_info)
ref_img_info = self.ref_img_sampling(img_info, **self.ref_img_sampler)
results = self.prepare_results(img_info)
ref_results = self.prepare_results(ref_img_info)
if self.match_gts:
results, ref_results = self.match_results(results, ref_results)
nomatch = (results['ann_info']['match_indices'] == -1).all()
if self.skip_nomatch_pairs and nomatch:
return None
self.pre_pipeline([results, ref_results])
return self.pipeline([results, ref_results])
# def prepare_test_img(self, idx):
# """Get training data and annotations after pipeline.
# Args:
# idx (int): Index of data.
# Returns:
# dict: Training data and annotation after pipeline with new keys \
# introduced by pipeline.
# """
# img_info = self.data_infos[idx]
# results = dict(img_info=img_info)
# ref_img_info = self.ref_img_sampling_test(img_info)
# ref_results = dict(img_info=ref_img_info)
# self.pre_pipeline([results, ref_results])
# return self.pipeline([results, ref_results])
def _parse_ann_info(self, img_info, ann_info):
"""Parse bbox and mask annotation.
Args:
ann_info (list[dict]): Annotation info of an image.
with_mask (bool): Whether to parse mask annotations.
Returns:
dict: A dict containing the following keys: bboxes, bboxes_ignore,\
labels, masks, seg_map. "masks" are raw annotations and not \
decoded into binary masks.
"""
gt_bboxes = []
gt_labels = []
gt_bboxes_ignore = []
gt_masks_ann = []
gt_instance_ids = []
for i, ann in enumerate(ann_info):
if ann.get('ignore', False):
continue
x1, y1, w, h = ann['bbox']
inter_w = max(0, min(x1 + w, img_info['width']) - max(x1, 0))
inter_h = max(0, min(y1 + h, img_info['height']) - max(y1, 0))
if inter_w * inter_h == 0:
continue
if ann['area'] <= 0 or w < 1 or h < 1:
continue
if ann['category_id'] not in self.cat_ids:
continue
bbox = [x1, y1, x1 + w, y1 + h]
if ann.get('iscrowd', False):
gt_bboxes_ignore.append(bbox)
else:
gt_bboxes.append(bbox)
gt_labels.append(self.cat2label[ann['category_id']])
if ann.get('segmentation', False):
gt_masks_ann.append(ann['segmentation'])
instance_id = ann.get('instance_id', None)
if instance_id is not None:
gt_instance_ids.append(ann['instance_id'])
if gt_bboxes:
gt_bboxes = np.array(gt_bboxes, dtype=np.float32)
gt_labels = np.array(gt_labels, dtype=np.int64)
else:
gt_bboxes = np.zeros((0, 4), dtype=np.float32)
gt_labels = np.array([], dtype=np.int64)
if gt_bboxes_ignore:
gt_bboxes_ignore = np.array(gt_bboxes_ignore, dtype=np.float32)
else:
gt_bboxes_ignore = np.zeros((0, 4), dtype=np.float32)
seg_map = img_info['filename'].replace('jpg', 'png')
ann = dict(
bboxes=gt_bboxes,
labels=gt_labels,
bboxes_ignore=gt_bboxes_ignore,
masks=gt_masks_ann,
seg_map=seg_map)
if self.load_as_video:
ann['instance_ids'] = np.array(gt_instance_ids).astype(np.int)
else:
ann['instance_ids'] = np.arange(len(gt_labels))
return ann
def format_track_results(self, results, **kwargs):
pass
def evaluate(self,
results,
metric=['bbox', 'track'],
logger=None,
classwise=True,
mot_class_average=True,
proposal_nums=(100, 300, 1000),
iou_thr=None,
metric_items=None):
# evaluate for detectors without tracker
#mot_class_average=False
mot_class_average=True
eval_results = dict()
metrics = metric if isinstance(metric, list) else [metric]
allowed_metrics = ['bbox', 'segm', 'track', 'segtrack']
for metric in metrics:
if metric not in allowed_metrics:
raise KeyError(f'metric {metric} is not supported')
if 'segtrack' in metrics:
track_eval_results = eval_mots(
self.coco,
mmcv.load(self.ann_file),
results['track_result'],
class_average=mot_class_average)
eval_results.update(track_eval_results)
elif 'track' in metrics:
track_eval_results = eval_mot(
mmcv.load(self.ann_file),
results['track_result'],
class_average=mot_class_average)
eval_results.update(track_eval_results)
return eval_results