Re: Luminance and RGB layers question

Mike,
That is interesting. It goes back farther than I would have guessed!

Tom
"Michael Daly" <MichaelDaly@xxxxxxx> wrote in message
news:sNydndhCFoW8YjzenZ2dnUVZ_tCdnZ2d@xxxxxxxxxxx
>
> On 15-Dec-2005, "Tom H." <tom_reader@xxxxxxxxxx*.net> wrote:
>
>> I do not know if professional astronomers use this technique too.
>
> They do and they've been using it since the days before CCDs. You can do
> the same thing with film, combining the images in the darkroom.
>
> The first "colour" camera in the Apollo program used a similar technique.
> A filter
> wheel with three colour and one clear filter passed in front of a B&W
> camera imaging
> tube. The image and filter timing was sent to earth and a humongous
> mainframe
> crunched the data to produce a colour TV image that was seen by everyone
> (today
> you could do it on a PC).
>
> Mike
>


.

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