Looks like more evidence for Atwood's Law: Any application that can be written in JavaScript, will eventually be written in JavaScript.

I have a couple of questions:

1. How does Liu Liu's algorithm (which I think he calls "deformable parts model") compare with Viola-Jones [1]? Any idea what the error stats (false positives & negatives) are like? In my experience [2] Viola-Jones has very low error rates. Regarding performance, I think it'll be a while before anything can come close to Viola-Jones, but this algo seems good enough.

2. Ok, this might be a stupid question, but I'll ask anyway.

Does this plugin mean that face detection can now be completely done on the client side? I use face detection in my web app [2] for passport photo formatting. I'm wondering if instead of uploading the photo (~2-4MB) to the server and processing it there with OpenCV, I can download the plugin to the browser(~0.5MB?) and get everything done right there.

[1] http://opencv.willowgarage.com/documentation/python/cascade_...

[2] http://freepassportphoto.dyndns.org/

The error rates info is from the webserver's error-log. Its very rare that I see a "No face found" error (false negatives) or get complaints that the formatted photo is all messed up (false positives).