WHILEDPEAS

This release introduces the WHIRLEDPEAS node, as detailed in a manuscript currently under review for Magnetic Resonance in Medicine. The source code for this node, as it existed at the time of publication, is archived in WHIRLEDPEAS.zip (attached to this release). Future updates may include bug fixes and enhancements to the node.

Additionally, three new nodes have been added to Read/Write, the MRIData class has been split, and a bug in the ImageDisplay node has been fixed.

V2.3.1-Water/Fat Deblurring Kernel Codes

This release attaches the cpp kernel codes (in zip file WFDeblurKernel.zip) to generate and do basic blurring/deblurring operations, which is described in a manuscript currently under review for Magnetic Resonance in Medicine. The complete codes for the water/fat deblurring node will be released in future.

Version 2.3.0 - SpiralGenCF

This release adds the SpiralGenCF node, which is described in a manuscript currently under review for Magnetic Resonance in Medicine. The source code for this node at the time of publication is archived in SpiralGenCF_21-22145.zip, attached to this release (future releases may contain bug fixes and/or improvements to the node).

For the Grid and SDC nodes, the default value of the ndim widget has been set to 2 as this is the default for data from ReadPhilips.

Version 2.2.0 - ReadDICOM, Reshape nodes

This node introduces two new nodes:

• Reshape, which combines functionality from other nodes such as Split and Combine
• ReadDICOM, ported from a project by @rkrobison, which allows reading of DICOM files and inspection of the header information. Note that this node relies on the PyDicom package, which will be added as a dependency in the Conda package.

A bug in the Dimensions node was also fixed.

Version 2.1.0 – Full Windows Compatibility

This release adds full compatibility for Windows — all nodes will now be built and distributed, including those using PyFI extensions. This required only minor changes, but knowing what the changes were may be useful for other GPI node developers:

• Use of long and unsigned long types was causing a segfault on Windows. These should be replaced with int64_t and uint64_t, respectively.
• Linking between files (e.g., linking to a kernel.cpp from an extension_PyMOD.cpp) should be done with only the file name, rather than a relative path like gpi_core/<folder>/kernel.cpp.

In addition, this release contains a few minor improvements:

• Fixed a number of warnings appearing with Python 3.8 (due to the use of is where == is more appropriate)
• The Audio node has been moved to the fileIO folder, as we have added the ability to save a .wav file.
• FFTW now works on up to 10-dimensional data

Version 2.0.3 — Matplotlib 3 compatibility and associated bug fixes

This patch release addresses errors in the Matplotlib and CrossSection nodes that were preventing installation with Matplotlib 3. We are aware that there are still a few bugs in Matplotlib and plan to address these in a future release.

Version 2.0.2 - Transpose Bug Fix

Release 2.0.2 fixes a bug in which changing two instances of the Transpose node in succession would cause GPI to crash. A warning generated by the Reduce node has also been fixed.

Version 2.0.1 - Matplotlib Bug Fix

This patch release fixes a bug where GPI would crash if a data source with more than 2 dimensions was connected to the Matplotlib node. The input connections are now restricted to 1D or 2D data.

GPI Core Nodes v2

Welcome to core nodes version 2.0!

The main change here is compatibility with GPI 1.1, which added support for qt5. Qt features are accessed via the GPI API differently than before, which required some re-working of the core nodes.

In addition, you'll find two new nodes present:

• Int_Math, which works just like Float_Math for integer values
• Switch, which allows you to toggle between a left and right inputs without re-drawing connections.

And some modifications to existing nodes:

• In the Collapse node, you can now use the "non-zero" option for collapsing in a single dimension, not just with "collapse all" selected
• The shapes node now allows for the generation of complex-valued noise, as well as repeatable noise using a user-specified seed.
• Calc_101 now allows for more granular control over the scheme used for derivatives and integrals.
• Many trigonometric functions now have a "cycles" option in addition to degrees and radians.
• Nodes with multiple functions will provide more information on the canvas about which function is active.

Development is ongoing and we welcome community contributions of any kind!