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Handle empty per-image boxes in MMDetection COCO conversion #3271

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Handle empty per-image boxes in MMDetection COCO conversion #3271

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4 changes: 4 additions & 0 deletions python/deeplake/integrations/mmdet/mmdet_dataset_.py
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Original file line number Diff line number Diff line change
Expand Up @@ -239,6 +239,8 @@ def pascal_frac_2_coco_pixel(boxes, images):
x_bottom = box[:, 2] * shape[1]
y_bottom = box[:, 3] * shape[0]
bbox = np.stack((x_top, y_top, x_bottom, y_bottom), axis=1)
else:
bbox = np.empty((0, 4), dtype=box.dtype)
pascal_pixel_boxes.append(bbox)
return pascal_pixel_2_coco_pixel(pascal_pixel_boxes, images)

Expand All @@ -252,6 +254,8 @@ def yolo_pixel_2_coco_pixel(boxes, images):
w = box[:, 2]
h = box[:, 3]
bbox = np.stack([x_top, y_top, w, h], axis=1)
else:
bbox = np.empty((0, 4), dtype=box.dtype)
yolo_boxes.append(bbox)
return yolo_boxes

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