Add HTML tooltips to image

I would love to find a fieldtype addon that enables me to add tooltips onto an image, like the example here: http://goo.gl/kkLXoZ

Basically a very simple editor that enabled you to select an image and create/edit/delete tooltips on a particular coordinate relative to the image container size. I haven’t seen this on devotee or elsewhere - thought I would try my luck here.

Thank you!