can someon really explain me this software? i am looking at google and i can not even find the official site.

for example:
you load a side pic of a head. and the software will then change the mesh of the figure so that the head looks like on the pic? can this be used for any figure or just the poser figures? 
i saw a plug in for photoshop. is this only for photoshop or for poser or a seperate software?