Ticket #1620 (closed feature: fixed)

Below is outlined a plan for implementing units support in IJ2 and Imglib2 (see #445)

Phase 1: see #1621

Research unit libraries to use. They should be allow definition of units by string. And support compound units. And conversions so we can calibrate values. Libraries to consider: JScience, uomo, and ucar udunits (and others?).

Phase 2: see #1622

Create an imglib project (imglib-units or imglib-axes) that is not in core that relies on one of the libraries considered. We would have an Axis class with type, label, and unit. We would also support a CalibratedImg that would be an Img with these Axis's. This could affect or replace ImgPlus in imglib2.

Phase 3: see #1623

Having done this work on a branch share with imglib developers and solicit feedback. Incorporate changes.

Phase 4: see #1624

Update existing IJ2 code to be compatible with CalibratedImg. ij-data would then depend upon imglib2-axes.

Phase 5: (open separate tickets when appropriate)

Enhance IJ2 to use calibrated image code where appropriate for new functionality

Note: there are units related tickets branching off ticket #445.