javascript image recognition script

I was wondering if there is a script or function in javascript which can recognize image patterns. I want to use this for automation. It is comparable to http://sikuli.org/ but I want this to run as a Firefox extension. I think https://addons.mozilla.org/de/firefox/addon开发者_如何学Python/imacros-for-firefox/ has this functionality but not in the free version.

As the Wikipedia article on Computer Vision may suggest, this is a fairly large field within Computer Science.

While I haven't checked, I don't think there are any general-purpose scripts for the tasks you want to solve.

I suggest you read up on Computer Vision / Image recognition, and try to narrow down what functionality you're looking for, and ask more specific questions.