Interactive Control Points

[tischi]

@tpietzsch My idea is to rewrite the whole TransformedBox (https://github.com/bigdataviewer/bigdataviewer-core/blob/master/src/main/java/bdv/tools/boundingbox/TransformedBoxOverlay.java) framework into a ControlPoints framework (https://github.com/tischi/imglib2-splines/blob/master/src/main/java/de/embl/cba/splines/controlpoints/ControlPointsOverlay.java).

So far I did nothing but

• copy and paste
• change the names of the classes

But do you think that's the right approach?

[tischi]

Hi @tpietzsch, I got a bit excited, because I think interactive control points could be a very generic thing that could reused in many contexts, such as:

• TransformableBox (could be just using a specific ControlPoints model)
• Any kind of transformable control point based ROIs (lines, squares, polygons, ...)
• Even landmarks based transformations such as the ones in BigWarp What do you think?

[tpietzsch]

@tischi Yes, copy & paste looks like a good start.

I like the idea of making a generic ControlPointEditor, and all the applications you mention would make a lot of sense. It would have to be quite configurable, e.g.:

• perspective distortion used for drawing
• how does visibility/editability of points change wrt distance to viewing plane
• constrain how much control points can move, globally (e.g., not outside image volume in the TransformableBox case) and/or with respect to each other

It might also make sense to add (optional) functionality to add/remove points interactively (for BigWarp use case).

I wouldn't try to implement all these immediately, but try to keep it in mind that this should be possible to add later...