Found this website here: pdfescape and it allows you to upload an image and then annotate it. I may be doing it wrong, but I insert it into a word document and save that whole page as a PDF. Then upload it, with the image on it, to this pdfescape website.
Then, that tool (you have to create an account) allows you to do this (you have to click on “Kafhre” to see the awesomeness as it opens the PDF):
Do you see all those cool comments? And questions? I just made an annotated image!
This will allow me to flip my entire History of Western Art I class this fall. They will watch videos from the Khan Academy Smarthistory website (which is also incredibly cool and you can find it here). BUT! They will have several videos to watch for each class AND THEY WILL NOT KNOW WHICH IMAGE THEY WILL HAVE TO ANNOTATE! Thus, I quiz them on their reading/video watching.