krosullivan@gmail.com

i want to use a hand held LED that will be picked up by a camera and tracked, and i want it's path to be traced out across the screen. but not a permanent trace. the kind of effect i'm looking for is is a like a comet tail.

hi
i want to use a hand held LED that will be picked up by a camera and tracked, and i want it's path to be traced out across the screen. but not a permanent trace. the kind of effect i'm looking for is is a like a comet tail.
any help would be much appreciated


colour-tracing

look at the jitter tutorials. there is jit.findbounds which does color tracking and then there is a "comet trail" example which uses feedback, I think. Can't remember which tutorials they are but that's where I would start.

convert your input matrrix to float32 and use jit.slide.

or jit.glop feedback. serach for jit.slide

On Tue, Apr 22, 2008 at 10:08 PM, Kev wrote:

> i want to use a hand held LED that will be picked up by a camera and

> tracked, and i want it's path to be traced out across the screen. but not a

> permanent trace. the kind of effect i'm looking for is is a like a comet

convert your input matrrix to float32 and use jit.slide.
or jit.glop feedback. serach for jit.slide
On Tue, Apr 22, 2008 at 10:08 PM, Kev  wrote:

>
> hi
> i want to use a hand held LED that will be picked up by a camera and
> tracked, and i want it's path to be traced out across the screen. but not a
> permanent trace. the kind of effect i'm looking for is is a like a comet
> tail.
> any help would be much appreciated
>

colour tracing