I have a task where turkers should annotate elements with bounding boxes, with the added extension of being able to connect two boxes with each other (to indicate a relationship, like with an arrow).
This is obviously really close to their crowd-bounding-box element, but I don't see a way of extending the underlying functionality with my feature.
Do I really have to re-implement the whole interface or is there source code available for their crowd elements?
Since I couldn't find a way to extend the code from Amazon, I built my own annotation front-end and open-sourced it: https://github.com/Dzeri96/sci-annot.
Check it out if you're in need of something similar.