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R

RNiftyReg

INFRA · APIS
Velocity0.0

Image Registration Using the 'NiftyReg' Library

github.com/jonclayden/rniftyreg ↗

Medical image registration, maintained with unusual care for other people's conventions.

medical-imagingimage-registrationneuroimaginginteroperabilitymaintenance
◆Current state
RNiftyReg wraps the NiftyReg C++ library for linear and non-linear registration of medical images in R. The releases in the window are all corrections rather than features: a serialisation bug in saveTransform(), a C++20 comparison warning, and a removed class member flagged by a compiler pre-release. The substantive item is 2.8.4, which fixed an image-flip bug when importing FSL-FLIRT transforms.
◆Where it's heading
The package is stable and the maintenance work is characteristically about interoperability, correctly interpreting transforms written by other toolchains and staying clean against evolving C++ standards and compilers. The FLIRT flip fix is the clearest example: it required knowing an undocumented quirk of how another tool handles images with positive-determinant xforms. Several fixes originate from CRAN's compiler checks, and 2.8.5 finally retired a README section about upgrading from a release line now over ten years old.
◆Prediction
Expect continued small releases tracking compiler and standards changes, with feature work arriving only if the underlying NiftyReg library moves.

◆Recent moves

  1. 5mo ago

    saveTransform() returns the serialised object instead of erroring

    Fixes single-argument saveTransform() to behave as documented, and avoids a C++20 comparison warning. Also drops a README upgrade section for a release line ten years gone, which is a fair marker of how settled the package is.

    View source ↗
  2. 1y ago

    FSL-FLIRT transform import no longer flips images

    Handles the FLIRT quirk of flipping images whose xforms have positive determinant, which could silently mis-apply transforms between LAS and RAS oriented images. The substantive fix in the window, and a good illustration of where this package's real work sits.

    View source ↗
  3. 2y ago

    Removed a class method referencing a nonexistent data member

    A correctness fix surfaced by an LLVM pre-release and reported through CRAN's compiler checks. Routine upkeep against moving toolchains.

    View source ↗
  4. 2y ago

    asAffine() convenience method added for niftyregRDS objects

    Adds a small conversion method and ensures loadTransform() results carry the affine class. Ergonomic tidying of the transform object contract.

    View source ↗