Re: Is this the real earth?

Quadibloc <jsavard@xxxxxxxxx> wrote in news:638fb6cd-4a81-459b-ace9-
2db7821981a4@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:

On Nov 25, 3:14 pm, Chris L Peterson <c...@xxxxxxxxxxxxxxxxxx> wrote:

The
widest gamut for humans was, not surprisingly, with three primaries
matched to the passbands of the retinal cone dyes.

Indeed. And if one can't conveniently produce filters with such
passbands, the next best thing would be to use four or more filters
from which suitable linear combinations could be extracted. Thus, SONY
makes some digital cameras with a fourth color, a shade of green they
call "Emerald".

I have a Nikon that also has 4 colors. It renders greens very nicely.
But I the more useful change to the bayer filters would be to add
a little extra short wavelength pass ont he red filter in the region
of violet, so that the camera sees violet at least as some shade of
purple, rather than just flat blue.

Take a picture of a rainbow from a prism and all you get is red-orange-
yellow-green-cyan-blue-blue.

Brian
--
http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism
Seismic FAQ: http://www.skywise711.com/SeismicFAQ/SeismicFAQ.html
Quake "predictions": http://www.skywise711.com/quakes/EQDB/index.html
Sed quis custodiet ipsos Custodes?
.

Relevant Pages

  • Re: Is this the real earth?
    ... widest gamut for humans was, not surprisingly, with three primaries ... matched to the passbands of the retinal cone dyes. ... And if one can't conveniently produce filters with such ...
    (sci.astro.amateur)
  • Re: Adding colors
    ... >> Using passband filters on these LED's would allow some light through ... >> of the specified waveband depending on the LED, ... > I am not aware of any electronically tunable optical filters though. ... Sed quis custodiet ipsos Custodes? ...
    (sci.optics)
  • Re: OT: AOL Starts to Charge for Receiving eMail (spread the word)
    ... sorry for OT, but I see some here with AOL addresses, and it might be of ... and some of the arguments I've had with people over their filters. ... person considers 'crap', another may consider 'gold'. ... Sed quis custodiet ipsos Custodes? ...
    (rec.aviation.piloting)
  • Re: Allpass filter & (locally) negative delay
    ... > to shorter and shorter cables. ... If passbands of the filters are separated ... When the passbands get closer to each other, ... Thus there will be plenty of amplitude ripple ...
    (sci.electronics.design)
  • Re: the real earth
    ... And the filters used affect and are part of the exposure. ... http://www.skywise711.com - Lasers, Seismology, Astronomy, Skepticism ... Sed quis custodiet ipsos Custodes? ...
    (sci.astro.amateur)
Quantcast