code: def img_res2pos1(res, bv_key):
      # Orient basis vectors in standard direction
      axis = res["axis"]
      bvs = res[bv_key]
      bps_img = res["basis_projections"]
      bps = bps_img.get_fdata()
      signs = np.sign(bvs[0])
      res[bv_key] = bvs * signs
      new_axes = [None] * bps.ndim
      n_comps = bps.shape[axis]
      new_axes[axis] = slice(0, n_comps)
      res["basis_projections"] = Image(
          bps * signs[tuple(new_axes)], bps_img.coordmap
      )
      return res
  
imports: import numpy
  import pytest
  from nibabel.affines import from_matvec
  from numpy.testing import assert_almost_equal, assert_array_equal
  from ....core.api import AffineTransform, Image
  from ....core.api import CoordinateSystem
  from ....core.image.image import rollimg
  from ....core.reference.coordinate_map import AxisError, drop_io_dim
  from ....core.reference.coordinate_map import product
  from ....io.api import load_image
  from ....testing import funcfile
  from ..pca import pca
  from ..pca import pca_image
  from .test_pca import res2pos1
label_desc: Use image node_id 12 for calling a global function with example usage: img_res2pos1(res, bv_key) and returns: res