def test_extract_patches_even(array, coords):
pb = patches.PatchBuilder(patch_size=2)
result = pb.extract(array)
for y, x in coords:
y = y % (array.shape[2] - 1)
x = x % (array.shape[3] - 1)
column = torch.cat(
[
array[:, :, y + 0, x + 0],
array[:, :, y + 0, x + 1],
array[:, :, y + 1, x + 0],
array[:, :, y + 1, x + 1],
],
dim=1,
)
assert (result[:, :, y, x] == column).all()
column_br = torch.cat(
[
array[:, :, -1, -1],
array[:, :, -1, -1],
array[:, :, -1, -1],
array[:, :, -1, -1],
],
dim=1,
)
assert (result[:, :, -1, -1] == column_br).all()
def test_reconstruct_patches_even(array):
pb = patches.PatchBuilder(patch_size=2, weights=(1.0, 0.0, 0.0, 0.0))
intermed = pb.extract(array)
repro = pb.reconstruct(intermed)
assert array.shape == repro.shape
assert (array == repro).all()
def test_reconstruct_patches_identity(array):
pb = patches.PatchBuilder(patch_size=1)
intermed = pb.extract(array)
repro = pb.reconstruct(intermed)
assert array.shape == repro.shape
assert (array == repro).all()
def test_extract_patches_odd(array, coords):
pb = patches.PatchBuilder(patch_size=3)
result = pb.extract(array)
for y, x in coords:
y = y % (array.shape[0] - 2)
x = x % (array.shape[1] - 2)
column = torch.cat([
array[y + 0, x + 0], array[y + 0, x + 1], array[y + 0, x + 2],
array[y + 1, x + 0], array[y + 1, x + 1], array[y + 1, x + 2],
array[y + 2, x + 0], array[y + 2, x + 1], array[y + 2, x + 2]
],
dim=0)
assert (result[y + 1, x + 1] == column).all()
column_br = torch.cat([
array[-2, -2], array[-2, -1], array[-2, -1], array[-1, -2],
array[-1, -1], array[-1, -1], array[-1, -2], array[-1, -1], array[-1,
-1]
],
dim=0)
assert (result[-1, -1] == column_br).all()
def test_extract_size(array, patch_size):
pb = patches.PatchBuilder(patch_size)
result = pb.extract(array)
assert result.shape[1] == array.shape[1] * (patch_size**2)
assert result.shape[2:] == array.shape[2:]
def test_extract_min_max(patch_size):
pb = patches.PatchBuilder(patch_size)
assert abs(pb.min) <= pb.max
assert (pb.max - pb.min) + 1 == patch_size
assert len(pb.coords) == patch_size
