"Green screen."

chris gagnon chris.gagnon at makeitlabs.com
Thu Feb 14 17:01:07 EST 2013


You can do a greenscreen in simplecv (an opencv wrapper)

http://examples.simplecv.org/en/latest/_downloads/green-screen.py

see the bottom of this page for more info:
http://examples.simplecv.org/en/latest/examples/image-math.html

On Thu, Feb 14, 2013 at 2:00 PM, Joshua Judson Rosen
<rozzin at geekspace.com>wrote:

> Ben Scott <dragonhawk at gmail.com> writes:
> >
> > On Wed, Feb 13, 2013 at 8:13 PM, Ken D'Ambrosio <ken at jots.org> wrote:
> > > ... a really solid idea for a fun activity was the proverbial
> > > TV weatherman "green screen."  I have to imagine this would
> > > be feasible with Linux -- anyone have any suggestions on
> > > leads to hunt down?
> >
> >   I've never worked with it, but "chromakey" is the generic term for
> > that.  Google results show some promise, although it seems to be
> > mostly post-production editing, not live:
> >
> > https://www.google.com/search?q=linux+chromakey
>
> EffectTV includes a very simple, real-time chromakey tool/toy, and it
> exists prepackaged in Debian and Ubuntu and maybe other
> distributions:
>
>     http://effectv.sourceforge.net/bluescreen.html
>
> If you want more of a `simple DIY' solution so that you can get into
> *how it works*, I seem to remember someone describing a way of using
> SimpleCV to do chromakey....
>
>
> EffectTV also gives you a lot of other fun real-time video effect toys
> to play with if you want; I think my favourites, when I played with it a
> few years ago, were...:
>
>     * The `Chameleon' effect that allows someone to walk onscreen and
>       then fade into the background like a chameleon:
>
>           http://effectv.sourceforge.net/chameleon.html
>
>     * The `invisiblility effect from the movie, `Predator':
>
>           http://effectv.sourceforge.net/predator.html
>
>     * The `scanning 1-D camera' effect:
>
>           http://effectv.sourceforge.net/1d.html
>
> --
> "Don't be afraid to ask (λf.((λx.xx) (λr.f(rr))))."
>
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>
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