TensorFlow MRI 0.16.0

Release 0.16.0

Breaking Changes

• tfmri.convex:

  • Several of the inputs and outputs of admm_minimize have been renamed
    to improve clarity and to make the interface more consistent with the
    tfmri.optimize module.

Major Features and Improvements

• tfmri.convex:

  • admm_minimize now supports batches of inputs.

  • admm_minimize has two new arguments f_prox_kwargs and
    g_prox_kwargs that allow passing additional arguments to the proximal
    operators of f and g.

  • admm_minimize has a new argument name that allows specifying
    the name of the operation.

  • Method _prox of ConvexFunctionQuadratic has a new argument
    solver_kwargs that allows passing additional arguments to the
    internal solver.

  • New properties shape and batch_shape for ConvexFunction and
    its subclasses. These allow retrieval of static shape information.

  • New methods ndim_tensor, shape_tensor and batch_shape_tensor
    for ConvexFunction and its subclasses. These allow retrieval of the
    dynamic shape information.

• tfmri.linalg:

  • New argument bypass_gradient for conjugate_gradient.

• tfmri.recon:

  • lstsq has a new argument return_optimizer_state which allows the
    user to retrieve the internal optimizer state.

• tfmri.optimize:

  • New function gradient_descent implementing the gradient descent method
    for minimization of differentiable functions.

• tfmri.plot:

  • New argument dpi for functions image_sequence and
    tiled_image_sequence.
  • New function close, alias of matplotlib.pyplot.close.

Bug Fixes and Other Changes

• tfmri.convex:

  • Fixed a bug in method prox of ConvexFunctionNorm,
    ConvexFunctionL2Squared and ConvexFunctionQuadratic that caused
    errors when running in graph mode.

• tfmri.linalg:

  • Fixed a bug in internal linear algebra framework that would cause errors
    when running in graph mode.

• tfmri.plot:

  • Removed lazy import mechanism which was causing problems when using
    matplotlib outside TFMRI. For now we use regular imports.