[maggit]

The text on the linked page actually compares this to Project Naptha:

> For extension gurus: You might have heard of Project Naptha, a great addon that applies state-of-the-art computer vision algorithms on every image you see while browsing the web. Copyfish solves the same problem, but it takes a different user interface approach. It does not try to alter the website. Instead, it lets you mark the text in the image that you want to extract. As a result Copyfish works with every website, even videos and PDF documents.