FIX: Use nitransforms for most xfm handling

nibabies/interfaces/resampling.py

@@ -4,10 +4,8 @@
 import os
 from collections.abc import Callable
 from functools import partial
-from pathlib import Path
 from typing import TypeVar
 
-import h5py
 import nibabel as nb
 import nitransforms as nt
 import numpy as np
@@ -19,12 +17,13 @@
     traits,
 )
 from nipype.utils.filemanip import fname_presuffix
-from nitransforms.io.itk import ITKCompositeH5
 from scipy import ndimage as ndi
 from scipy.sparse import hstack as sparse_hstack
 from sdcflows.transform import grid_bspline_weights
 from sdcflows.utils.tools import ensure_positive_cosines
 
+from nibabies.utils.transforms import load_transforms
+
 R = TypeVar('R')
 
 
@@ -34,95 +33,6 @@ async def worker(job: Callable[[], R], semaphore: asyncio.Semaphore) -> R:
         return await loop.run_in_executor(None, job)
 
 
-def load_transforms(xfm_paths: list[Path], inverse: list[bool]) -> nt.base.TransformBase:
-    """Load a series of transforms as a nitransforms TransformChain
-
-    An empty list will return an identity transform
-    """
-    if len(inverse) == 1:
-        inverse *= len(xfm_paths)
-    elif len(inverse) != len(xfm_paths):
-        raise ValueError('Mismatched number of transforms and inverses')
-
-    chain = None
-    for path, inv in zip(xfm_paths[::-1], inverse[::-1], strict=False):
-        path = Path(path)
-        if path.suffix == '.h5':
-            xfm = load_ants_h5(path)
-        else:
-            xfm = nt.linear.load(path)
-        if inv:
-            xfm = ~xfm
-        if chain is None:
-            chain = xfm
-        else:
-            chain += xfm
-    if chain is None:
-        chain = nt.base.TransformBase()
-    return chain
-
-
-FIXED_PARAMS = np.array([
-    193.0, 229.0, 193.0,  # Size
-    96.0, 132.0, -78.0,   # Origin
-    1.0, 1.0, 1.0,        # Spacing
-    -1.0, 0.0, 0.0,       # Directions
-    0.0, -1.0, 0.0,
-    0.0, 0.0, 1.0,
-])  # fmt:skip
-
-
-def load_ants_h5(filename: Path) -> nt.base.TransformBase:
-    """Load ANTs H5 files as a nitransforms TransformChain"""
-    # Borrowed from https://github.com/feilong/process
-    # process.resample.parse_combined_hdf5()
-    #
-    # Changes:
-    #   * Tolerate a missing displacement field
-    #   * Return the original affine without a round-trip
-    #   * Always return a nitransforms TransformChain
-    #
-    # This should be upstreamed into nitransforms
-    h = h5py.File(filename)
-    xform = ITKCompositeH5.from_h5obj(h)
-
-    # nt.Affine
-    transforms = [nt.Affine(xform[0].to_ras())]
-
-    if '2' not in h['TransformGroup']:
-        return transforms[0]
-
-    transform2 = h['TransformGroup']['2']
-
-    # Confirm these transformations are applicable
-    if transform2['TransformType'][:][0] not in (
-        b'DisplacementFieldTransform_float_3_3',
-        b'DisplacementFieldTransform_double_3_3',
-    ):
-        msg = 'Unknown transform type [2]\n'
-        for i in h['TransformGroup'].keys():
-            msg += f'[{i}]: {h["TransformGroup"][i]["TransformType"][:][0]}\n'
-        raise ValueError(msg)
-
-    fixed_params = transform2['TransformFixedParameters'][:]
-    shape = tuple(fixed_params[:3].astype(int))
-    # ITK stores warps in Fortran-order, where the vector components change fastest
-    # Nitransforms expects 3 volumes, not a volume of three-vectors, so transpose
-    warp = np.reshape(
-        transform2['TransformParameters'],
-        (3, *shape),
-        order='F',
-    ).transpose(1, 2, 3, 0)
-
-    warp_affine = np.eye(4)
-    warp_affine[:3, :3] = fixed_params[9:].reshape((3, 3))
-    warp_affine[:3, 3] = fixed_params[3:6]
-    lps_to_ras = np.eye(4) * np.array([-1, -1, 1, 1])
-    warp_affine = lps_to_ras @ warp_affine
-    transforms.insert(0, nt.DenseFieldTransform(nb.Nifti1Image(warp, warp_affine)))
-    return nt.TransformChain(transforms)
-
-
 class ResampleSeriesInputSpec(TraitedSpec):
     in_file = File(exists=True, mandatory=True, desc='3D or 4D image file to resample')
     ref_file = File(exists=True, mandatory=True, desc='File to resample in_file to')
@@ -788,7 +698,7 @@ def reconstruct_fieldmap(
     )
 
     if not direct:
-        fmap_img = transforms.apply(fmap_img, reference=target)
+        fmap_img = nt.apply(fmap_img, reference=target)
 
     fmap_img.header.set_intent('estimate', name='fieldmap Hz')
     fmap_img.header.set_data_dtype('float32')

nibabies/utils/transforms.py

@@ -0,0 +1,34 @@
+"""Utilities for loading transforms for resampling"""
+
+from pathlib import Path
+
+import nitransforms as nt
+
+
+def load_transforms(xfm_paths: list[Path], inverse: list[bool]) -> nt.base.TransformBase:
+    """Load a series of transforms as a nitransforms TransformChain
+
+    An empty list will return an identity transform
+    """
+    if len(inverse) == 1:
+        inverse *= len(xfm_paths)
+    elif len(inverse) != len(xfm_paths):
+        raise ValueError('Mismatched number of transforms and inverses')
+
+    chain = None
+    for path, inv in zip(xfm_paths[::-1], inverse[::-1], strict=False):
+        path = Path(path)
+        if path.suffix == '.h5':
+            # Load as a TransformChain
+            xfm = nt.manip.load(path)
+        else:
+            xfm = nt.linear.load(path)
+        if inv:
+            xfm = ~xfm
+        if chain is None:
+            chain = xfm
+        else:
+            chain += xfm
+    if chain is None:
+        chain = nt.Affine()  # Identity
+    return chain

nibabies/workflows/bold/registration.py

@@ -741,14 +741,16 @@ def _conditional_downsampling(in_file, in_mask, zoom_th=4.0):
     offset = old_center - newrot.dot((newshape - 1) * 0.5)
     newaffine = nb.affines.from_matvec(newrot, offset)
 
+    identity = nt.Affine()
+
     newref = nb.Nifti1Image(np.zeros(newshape, dtype=np.uint8), newaffine)
-    nt.Affine(reference=newref).apply(img).to_filename(out_file)
+    nt.apply(identity, img, reference=newref).to_filename(out_file)
 
     mask = nb.load(in_mask)
     mask.set_data_dtype(float)
     mdata = gaussian_filter(mask.get_fdata(dtype=float), scaling)
     floatmask = nb.Nifti1Image(mdata, mask.affine, mask.header)
-    newmask = nt.Affine(reference=newref).apply(floatmask)
+    newmask = nt.apply(identity, floatmask, reference=newref)
     hdr = newmask.header.copy()
     hdr.set_data_dtype(np.uint8)
     newmaskdata = (newmask.get_fdata(dtype=float) > 0.5).astype(np.uint8)

pyproject.toml

@@ -24,7 +24,7 @@ dependencies = [
     "nipype >= 1.8.5",
     "nireports >= 23.2.0",
     "nitime",
-    "nitransforms >= 23.0.1",
+    "nitransforms >= 24.1.1",
     "niworkflows >= 1.12.1",
     "numpy >= 1.21.0",
     "packaging",

requirements.txt

@@ -17,7 +17,7 @@ annexremote==1.6.6
     #   datalad-osf
 astor==0.8.1
     # via formulaic
-attrs==24.2.0
+attrs==24.3.0
     # via
     #   jsonschema
     #   niworkflows
@@ -31,16 +31,14 @@ bidsschematools==1.0.0
     # via bids-validator
 bokeh==3.5.2
     # via tedana
-boto3==1.35.80
+boto3==1.35.83
     # via datalad
-botocore==1.35.80
+botocore==1.35.83
     # via
     #   boto3
     #   s3transfer
-certifi==2024.8.30
+certifi==2024.12.14
     # via requests
-cffi==1.17.1
-    # via cryptography
 chardet==5.2.0
     # via datalad
 charset-normalizer==3.4.0
@@ -58,11 +56,9 @@ contourpy==1.3.1
     # via
     #   bokeh
     #   matplotlib
-cryptography==44.0.0
-    # via secretstorage
 cycler==0.12.1
     # via matplotlib
-datalad==1.1.4
+datalad==1.1.5
     # via
     #   datalad-next
     #   datalad-osf
@@ -87,8 +83,6 @@ formulaic==0.5.2
     # via pybids
 fsspec==2024.10.0
     # via universal-pathlib
-greenlet==3.1.1
-    # via sqlalchemy
 h5py==3.12.1
     # via nitransforms
 humanize==4.11.0
@@ -123,10 +117,6 @@ jaraco-context==6.0.1
     #   keyrings-alt
 jaraco-functools==4.1.0
     # via keyring
-jeepney==0.8.0
-    # via
-    #   keyring
-    #   secretstorage
 jinja2==3.1.4
     # via
     #   bokeh
@@ -171,7 +161,7 @@ mapca==0.0.5
     # via tedana
 markupsafe==3.0.2
     # via jinja2
-matplotlib==3.9.3
+matplotlib==3.10.0
     # via
     #   nireports
     #   nitime
@@ -214,7 +204,7 @@ nilearn==0.10.4
     #   nireports
     #   niworkflows
     #   tedana
-nipype==1.9.1
+nipype==1.9.2
     # via
     #   nibabies (pyproject.toml)
     #   nireports
@@ -225,7 +215,7 @@ nireports==24.0.3
     # via nibabies (pyproject.toml)
 nitime==0.11
     # via nibabies (pyproject.toml)
-nitransforms==24.1.0
+nitransforms==24.1.1
     # via
     #   nibabies (pyproject.toml)
     #   niworkflows
@@ -235,7 +225,7 @@ niworkflows==1.12.1
     #   nibabies (pyproject.toml)
     #   sdcflows
     #   smriprep
-num2words==0.5.13
+num2words==0.5.14
     # via pybids
 numpy==2.1.1
     # via
@@ -327,8 +317,6 @@ pybtex==0.24.0
     # via tedana
 pybtex-apa-style==1.3
     # via tedana
-pycparser==2.22
-    # via cffi
 pydot==3.0.3
     # via nipype
 pyparsing==3.2.0
@@ -343,7 +331,7 @@ python-dateutil==2.9.0.post0
     #   nipype
     #   pandas
     #   prov
-python-gitlab==5.1.0
+python-gitlab==5.2.0
     # via datalad
 pytz==2024.2
     # via pandas
@@ -384,7 +372,7 @@ rpds-py==0.22.3
     #   referencing
 s3transfer==0.10.4
     # via boto3
-scikit-image==0.24.0
+scikit-image==0.25.0
     # via
     #   niworkflows
     #   sdcflows
@@ -415,8 +403,6 @@ seaborn==0.13.2
     # via
     #   nireports
     #   niworkflows
-secretstorage==3.3.3
-    # via keyring
 simplejson==3.19.3
     # via nipype
 six==1.17.0