Posted by PTravel on 07/02/06 22:17

"Martin Heffels" <youwishyouwouldknow@nottellinya.com> wrote in message
news:d0bga2la72c3d07m20mpvjlg2idboc7ruo@4ax.com...
> On Sun, 02 Jul 2006 20:12:03 GMT, "PTravel" <ptravel@travelersvideo.com>
> wrote:
>
>>I can't think of anything that will add spectra that simply aren't there.
>
> You answered your own question already. You would indeed need to bring in
> your own light with a broader spectrum. But I don't see you drag around a
> Musco-truck all the time :-)) You could add some filters to the lights,
> but
> they merely change what you have, like shifting the spectrum a few hundred
> Kelvin, but it stays equally narrow-banded.
>
> Compare it with playing a CD via the telephone. You cut out everything
> below 300Hz and above 3kHz, and you won't be able to recreate the London
> Symphonic Orchestra in all it's glory again.

I was thinking more in line with the video equivalent of an audio
compander -- something that can take the limited range that's available and
expand it. For example, if Na lights put out light limited to 240-245
angstroms (I'm just making up numbers here), something that would
extrapolate on the video so that the lower range fell closer to red and the
upper range closer to blue would provide a more varied, albeit false,
coloration.

Hmmm. Have I just invented a new filter?


>
> cheers
>
> -martin-
> --
> "If he can he'll smile 'cos he's a Royal Crocodile."
>
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