Increase usability for label editing

[maarzt]

Currently Labkit's concept for label editing is very much like a very simple version of Paintbrush. The usability provided by this concept is quite low.

I can think of many things, that would simplify label editing:

• Splitting a labels into connected components.
• Selecting connected components (to remove / copy / ... etc).
• Joining two labels into one.
• Split a label into multiple layers like known from Gimp / Photoshop.

[imagejan]

Aren't these all features that could (and should) be dealt with on a different level, say imglib2-roi? It would be awesome if Labkit could just wrap the ROI model from there :-)

[maarzt]

That's true. But currently there's not much overlap between imglib2-roi. If think imglib2-roi currently only provides geometric shapes, and there's no editor for imglib2-roi? Labkit currently is an editor for for free shaped labels only.

For me an ideal ImageJ2 region of interest future looks like this:

• BDV becomes the default image displayer in ImageJ2.
• IJ1 rois are replaced by imglib2-roi.
• Labkit becomes part of the default image displayer and is used for imglib2-roi editing.

If there's any effort to build an imglib2-roi editor, I would want to be part of that.