def test_sampling_affine(): # check sampled (projected) values on a toy image img = np.ones((4, 4, 4)) img[1, :, :] = 2 nodes = [[1, 1, 2], [10, 10, 20], [30, 30, 30]] mesh = [np.asarray(nodes), None] affine = 10 * np.eye(4) affine[-1, -1] = 1 texture = surface._nearest_voxel_sampling( [img], mesh, affine=affine, radius=1, kind='ball') assert_array_equal(texture[0], [1., 2., 1.]) texture = surface._interpolation_sampling( [img], mesh, affine=affine, radius=0, kind='ball') assert_array_almost_equal(texture[0], [1.1, 2., 1.])
def test_sampling_affine(): # check sampled (projected) values on a toy image img = np.ones((4, 4, 4)) img[1, :, :] = 2 nodes = [[1, 1, 2], [10, 10, 20], [30, 30, 30]] mesh = [np.asarray(nodes), None] affine = 10 * np.eye(4) affine[-1, -1] = 1 texture = surface._nearest_voxel_sampling( [img], mesh, affine=affine, radius=1, kind='ball') assert_array_equal(texture[0], [1., 2., 1.]) texture = surface._interpolation_sampling( [img], mesh, affine=affine, radius=0, kind='ball') assert_array_almost_equal(texture[0], [1.1, 2., 1.])