Wagner wrote:
Hi Miguel... my suggestion is:  Use a dog instead, it can recognize
people 50 meters away in half second... hehe, just kiding. Sometimes the
.......
>to do it? what is the best way? etc... Probably the best question is:
>How can WE recognize a person in seconds? Remember that it can take
>several minutes to do the same thing if the person is (or we are) upside
.......

Miguel, in case you haven't seen it, you might check out CMU's
Face Detector Demo Online:

http://www.cs.cmu.edu/~har/faces.html