def test_vol_to_surf(kind, n_scans, use_mask):
img, mask_img = data_gen.generate_mni_space_img(n_scans)
if not use_mask:
mask_img = None
if n_scans == 1:
img = image.new_img_like(img, image.get_data(img).squeeze())
fsaverage = datasets.fetch_surf_fsaverage()
mesh = surface.load_surf_mesh(fsaverage["pial_left"])
inner_mesh = surface.load_surf_mesh(fsaverage["white_left"])
center_mesh = np.mean([mesh[0], inner_mesh[0]], axis=0), mesh[1]
proj = surface.vol_to_surf(
img, mesh, kind="depth", inner_mesh=inner_mesh, mask_img=mask_img)
other_proj = surface.vol_to_surf(
img, center_mesh, kind=kind, mask_img=mask_img)
correlation = pearsonr(proj.ravel(), other_proj.ravel())[0]
assert correlation > .99
with pytest.raises(ValueError, match=".*interpolation.*"):
surface.vol_to_surf(img, mesh, interpolation="bad")
def test_depth_ball_sampling():
img, *_ = data_gen.generate_mni_space_img()
mesh = surface.load_surf_mesh(datasets.fetch_surf_fsaverage()["pial_left"])
with pytest.raises(ValueError, match=".*does not support.*"):
surface.vol_to_surf(img, mesh, kind="ball", depth=[.5])