Weak score estimator and Japanese rules

There should be “estimator” where you can freely and easy paint like in Paint. And this estimator would just exactly count area of what you painted. Nothing Go related.
Something like Voronoi_diagram(but with low resolution) may do default paint (before you repaint it).

update: https://forums.online-go.com/t/weak-score-estimator-and-japanese-rules/41041/70