ActionScript: Scan image for other images

I know this doesn't have a simple answer, but I want to learn how to scan images, and thus videos (frame-by-frame) and identify other images in that initial image with a given amount of error.

Are there a开发者_JS百科ny libraries for this? Any hints?

Thank you.

I think you refer to Augmented Reality (or AR, I don't really know if there's a more technical word for it). There are a few libraries out there, mostly FLARToolKit, plus a few forks of it. This is mostly for recognizing markers or patterns within an image (or video).

I know @inspirit is doing some really cool stuff in this area and has been posting a lot in his blog, but afaik he hasn't released anything yet.