Sensor Animation Softwere

I read somthing in 3D world awhile ago (I think it was last months issue) about a plug in for Poser that would take video futage of an actors face and use stickers or marks (on the actor) to animate a 3D model.
It mentioned, however, that it (the program) was not the most detailed on the market. I was wondering if anyone knows one thats more detailed.
I think the Polar Express used somthing like that, anyone know what they did/