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Remove useless bboxes&labels in CocoDataset #159

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Remove useless bboxes&labels in CocoDataset #159

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7d53423
Remove useless bboxes&labels
ShiquanYu Feb 24, 2021
41a7b1b
Update coco.py
ShiquanYu Feb 25, 2021
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23 changes: 23 additions & 0 deletions nanodet/data/dataset/coco.py
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Original file line number Diff line number Diff line change
Expand Up @@ -126,6 +126,29 @@ def get_train_data(self, idx):

meta = self.pipeline(meta, self.input_size)
meta['img'] = torch.from_numpy(meta['img'].transpose(2, 0, 1))

# Remove the bboxes and labels outside the image
if len(meta['gt_bboxes']) > 0 and len(meta['gt_labels']) > 0 :
gt_bboxes = []
gt_labels = []
for gt_bbox, gt_label in zip(meta['gt_bboxes'], meta['gt_labels']):
if (gt_bbox[0] == meta['img'].shape[2]) or (gt_bbox[1] == meta['img'].shape[1]) or (gt_bbox[2] == 0) or (gt_bbox[3] == 0):
continue
gt_bboxes.append(gt_bbox)
gt_labels.append(gt_label)
if len(gt_bboxes):
meta['gt_bboxes'] = np.asarray(gt_bboxes)
else:
meta['gt_bboxes'] = np.zeros([0, 4], dtype=np.float32)
if len(gt_labels):
meta['gt_labels'] = np.asarray(gt_labels)
else:
meta['gt_labels'] = np.zeros([0,], dtype=np.int64)

# Remove image without label&bbox
if self.mode == 'train' and len(meta['gt_bboxes']) == 0:
return None

return meta

def get_val_data(self, idx):
Expand Down