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import numpy as np
import pytest
import torch
from mmdet.core.bbox import distance2bbox
from mmdet.core.mask.structures import BitmapMasks, PolygonMasks
from mmdet.core.utils import mask2ndarray
def dummy_raw_polygon_masks(size):
"""
Args:
size (tuple): expected shape of dummy masks, (N, H, W)
Return:
list[list[ndarray]]: dummy mask
"""
num_obj, heigt, width = size
polygons = []
for _ in range(num_obj):
num_points = np.random.randint(5) * 2 + 6
polygons.append([np.random.uniform(0, min(heigt, width), num_points)])
return polygons
def test_mask2ndarray():
raw_masks = np.ones((3, 28, 28))
bitmap_mask = BitmapMasks(raw_masks, 28, 28)
output_mask = mask2ndarray(bitmap_mask)
assert np.allclose(raw_masks, output_mask)
raw_masks = dummy_raw_polygon_masks((3, 28, 28))
polygon_masks = PolygonMasks(raw_masks, 28, 28)
output_mask = mask2ndarray(polygon_masks)
assert output_mask.shape == (3, 28, 28)
raw_masks = np.ones((3, 28, 28))
output_mask = mask2ndarray(raw_masks)
assert np.allclose(raw_masks, output_mask)
raw_masks = torch.ones((3, 28, 28))
output_mask = mask2ndarray(raw_masks)
assert np.allclose(raw_masks, output_mask)
# test unsupported type
raw_masks = []
with pytest.raises(TypeError):
output_mask = mask2ndarray(raw_masks)
def test_distance2bbox():
point = torch.Tensor([[74., 61.], [-29., 106.], [138., 61.], [29., 170.]])
distance = torch.Tensor([[0., 0, 1., 1.], [1., 2., 10., 6.],
[22., -29., 138., 61.], [54., -29., 170., 61.]])
expected_decode_bboxes = torch.Tensor([[74., 61., 75., 62.],
[0., 104., 0., 112.],
[100., 90., 100., 120.],
[0., 120., 100., 120.]])
out_bbox = distance2bbox(point, distance, max_shape=(120, 100))
assert expected_decode_bboxes.allclose(out_bbox)
out = distance2bbox(point, distance, max_shape=torch.Tensor((120, 100)))
assert expected_decode_bboxes.allclose(out)
batch_point = point.unsqueeze(0).repeat(2, 1, 1)
batch_distance = distance.unsqueeze(0).repeat(2, 1, 1)
batch_out = distance2bbox(
batch_point, batch_distance, max_shape=(120, 100))[0]
assert out.allclose(batch_out)
batch_out = distance2bbox(
batch_point, batch_distance, max_shape=[(120, 100), (120, 100)])[0]
assert out.allclose(batch_out)
batch_out = distance2bbox(point, batch_distance, max_shape=(120, 100))[0]
assert out.allclose(batch_out)
# test max_shape is not equal to batch
with pytest.raises(AssertionError):
distance2bbox(
batch_point,
batch_distance,
max_shape=[(120, 100), (120, 100), (32, 32)])
rois = torch.zeros((0, 4))
deltas = torch.zeros((0, 4))
out = distance2bbox(rois, deltas, max_shape=(120, 100))
assert rois.shape == out.shape
rois = torch.zeros((2, 0, 4))
deltas = torch.zeros((2, 0, 4))
out = distance2bbox(rois, deltas, max_shape=(120, 100))
assert rois.shape == out.shape
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