All digital cameras use interpolation

"Charles Schuler" wrote:

A definition of interpolation: to estimate a value of a function or series
between two known values. Most seem to understand why Bayer sensors use
interpolation (demosaicking). Many seem to believe that Sigma/Foveon needs
no interpolation. This is stated in Foveon literature and is often quoted
on the web. It's not correct. A better statement would be Sigma/Foveon
needs no demosaicking.

Stacked photodetectors rely on quantum pumping of a crystal lattice by
photons plus the fact that shorter wavelengths tend to knock electrons loose
deeper into the crystal than do longer wavelengths. It's a great idea and
it works. However, quantum mechanics is about probabilities and it is
necessary to apply "interpolation" to the Foveon RGB detector outputs to
determine true color and luminance. Does every "blue photon" penetrate the
crystal exactly the same and always excite only the blue photodetector? Are
all Foveon sensors exactly alike? Do they work exactly the same over the
temperature range to which they are subjected? The answers are obviously
NO. "Best guess" is what you get.

I am not knocking Foveon or Sigma. I think the Foveon is a more elegant
solution than the Bayer mosaic. I believe this technology is going to gain
momentum because it shows a lot of promise. I don't own/use this technology
but am certainly watching it and trying to keep an open mind. It's not easy
thanks to some of the outrageous claims and statements floating around.

Thanks.

Foveon is the best and people need to stop with the misleading information.

nooooooo ... they are just cheaper in Russia. The
chip is currently only a really good idea, it is not
mature yet. And they messed up the original chip
by putting the micro lenses on it, X3 10M. Now
it is much more out of color balance.

Alex

wrote in message news:400F276E.27138.2402971@localhost...
"Charles Schuler" wrote:

A definition of interpolation: to estimate a value of a function or series
between two known values. Most seem to understand why Bayer sensors use
interpolation (demosaicking). Many seem to believe that Sigma/Foveon needs
no interpolation. This is stated in Foveon literature and is often quoted
on the web. It's not correct. A better statement would be Sigma/Foveon
needs no demosaicking.

Stacked photodetectors rely on quantum pumping of a crystal lattice by
photons plus the fact that shorter wavelengths tend to knock electrons loose
deeper into the crystal than do longer wavelengths. It's a great idea and
it works. However, quantum mechanics is about probabilities and it is
necessary to apply "interpolation" to the Foveon RGB detector outputs to
determine true color and luminance. Does every "blue photon" penetrate the
crystal exactly the same and always excite only the blue photodetector? Are
all Foveon sensors exactly alike? Do they work exactly the same over the
temperature range to which they are subjected? The answers are obviously
NO. "Best guess" is what you get.

I am not knocking Foveon or Sigma. I think the Foveon is a more elegant
solution than the Bayer mosaic. I believe this technology is going to gain
momentum because it shows a lot of promise. I don't own/use this technology
but am certainly watching it and trying to keep an open mind. It's not easy
thanks to some of the outrageous claims and statements floating around.

Thanks.

Foveon is the best and people need to stop with the misleading information.

Thanks.

Foveon is the best and people need to stop with the misleading information.


That simplistic ( and wrong) one-liner earns you a slot in my kill
file. Looks like a George--talks like a George. By George, it might
be a. .................................................. ..MORON
**************************
Mark Herring, Pasadena, Calif.
Private e-mail: Just say no to "No".

wrote in message news:400F276E.27138.2402971@localhost...
"Charles Schuler" wrote:

A definition of interpolation: to estimate a value of a function or
series
between two known values. Most seem to understand why Bayer sensors use
interpolation (demosaicking). Many seem to believe that Sigma/Foveon
needs
no interpolation. This is stated in Foveon literature and is often
quoted
on the web. It's not correct. A better statement would be Sigma/Foveon
needs no demosaicking.

Stacked photodetectors rely on quantum pumping of a crystal lattice by
photons plus the fact that shorter wavelengths tend to knock electrons
loose
deeper into the crystal than do longer wavelengths. It's a great idea
and
it works. However, quantum mechanics is about probabilities and it is
necessary to apply "interpolation" to the Foveon RGB detector outputs to
determine true color and luminance. Does every "blue photon" penetrate
the
crystal exactly the same and always excite only the blue photodetector?
Are
all Foveon sensors exactly alike? Do they work exactly the same over
the
temperature range to which they are subjected? The answers are
obviously
NO. "Best guess" is what you get.

I am not knocking Foveon or Sigma. I think the Foveon is a more elegant
solution than the Bayer mosaic. I believe this technology is going to
gain
momentum because it shows a lot of promise. I don't own/use this
technology
but am certainly watching it and trying to keep an open mind. It's not
easy
thanks to some of the outrageous claims and statements floating around.

Thanks.

Foveon is the best and people need to stop with the misleading
information.

Best for the first time photographer maybe... but worst for accuracy

In message vAKPb.56961$zs4.23200@fed1read01,
"AArDvarK" wrote:

nooooooo ... they are just cheaper in Russia. The
chip is currently only a really good idea, it is not
mature yet. And they messed up the original chip
by putting the micro lenses on it, X3 10M. Now
it is much more out of color balance.

That's impossible. The filters smooth out inconsistencies between the
photosites, and increas sensitivity by raising the fill factor from 30%
to almost 100%. That's 3.33x as much light collected for the same
aperture and shutter speed.
--


John P Sheehy