Hello , i have 2 questions: how can i do outline detection with processing?
im experimenting with some computer vision and i want to be able to track the outline of a hand, a body or a shape...

my second question is how can i detect collision of this outlined shape with other shapes o elements , like sphere , rect, or points?

i have a program that create  lots of moving spheres
and i want to be able to detect the collision of those spheres with the outlined hand or body.... for example when your outlined hand collides with a moving sphere it( the moving sphere) change its direction..
any idea of doing this?

thanks

punchik

Seems to be two parts to this task

1) Trace the outline of the image and create a polygon, blob or some other way of storing this information

2) Doing the collision detection between the objects and the polygon/blob/etc.

For 2) the first response there seems like a good starting point. For 1) there is a library called BlobDetection found under the References section that might help you detect the shapes in the image. You should also look into if there are any decent physics libs for Java around, as these often have good implementations of collision detection etc.