v.heads v.heads finds heads, and maintains head histories. v.heads finds heads, and maintains head histories. It expects to receive two input streams (from v.silhouette). It locates probably heads from these streams, and tracks them across time. The main head output is from the middle outlet. This outputs a list of heads ( x, y, and age for each). There are always max_heads triplets output, but empty heads are indicated with (-1, -1, 0). Dormant heads have a negative age, and are there to catch re-emerging heads that may have disappeared due to collisions, etc. The v.silhouette / v.heads combination will only work if a correctly processed stream is used as the input. See the example patch for more info.

from the library : softVNS Format : External Environment : jitter / max commercial Max 4.x http://homepage.mac.com/davidrokeby/softVNS.html