SIGMA VIDEO CAMERA W/ FOVEON X75v....Tomorrow the official announcement will be their on D P Reviews

"Bart van der Wolf" writes:

"George Preddy" wrote in message
om...
SNIP
The precise spectral response of the 10M is published all over
the web, same for the 5M.

http://www.hanvision.com/contents/pr...0_2004_HVC.pdf

Which indicates that e.g. green (550 nm wavelength) is seen as 49% blue,
63%green, and 45% red.

Not really. Those are "normalized" curves. I suspect they mean that
each has been scaled to make the integral under the curve 1. It would
be shocking if the blue channel had a higher peak response than red.

That means the color is VERY desaturated and massive
postprocessing is needed to get a usable color (but with lots of noise).

"Massive"? "Lots"? Let's say "more noise in saturated colors".

The above implementation is also only 30-bits digital color output!

Yup. Read the fine print. "30-bit RGB output interfaces to parallel
LVDS framegrabbers supporting four 8-bit input channels."

Apparently they were working to an interface that was only capable of
32 bits. That doesn't tell the limit of the sensor.

The Foveon sensor has advantages and disadvantages, as with most
technology. My impression is that the sensor in this camera (and the
Sigmas) is competitive with 6MP color-filter-array sensors.

--
-Stephen H. Westin
Any information or opinions in this message are mine: they do not
represent the position of Cornell University or any of its sponsors.

"Bart van der Wolf" wrote in message ...
"George Preddy" wrote in message
om...
SNIP
The precise spectral response of the 10M is published all over
the web, same for the 5M.

http://www.hanvision.com/contents/pr...0_2004_HVC.pdf

Which indicates that e.g. green (550 nm wavelength) is seen as 49% blue,
63%green, and 45% red.

The ideal spectral response curves overlay the Foveon curves almost
precisely (which is intentional of course), that is why Foveon is the
only option for scientitfically perfect work. Colors are quantum
accurate, all Bayer colors are guessed--100% of the output pixles are
totally wrong, thus all Bayer images are of exactly zero scientific
value.

"George Preddy" wrote in message
om...
"Bart van der Wolf" wrote in message
...
"George Preddy" wrote in message
om...
SNIP
The precise spectral response of the 10M is published all over
the web, same for the 5M.


http://www.hanvision.com/contents/pr...0_2004_HVC.pdf

Which indicates that e.g. green (550 nm wavelength) is seen as 49% blue,
63%green, and 45% red.

The ideal spectral response curves overlay the Foveon curves almost
precisely (which is intentional of course), that is why Foveon is the
only option for scientitfically perfect work. Colors are quantum
accurate, all Bayer colors are guessed--100% of the output pixles are
totally wrong, thus all Bayer images are of exactly zero scientific
value.

They can't be totally wrong and I can prove it. Just take a picture and
make them more wrong, which wouldn't be possible if they were totally wrong.
Then the picture will become unrecognizable.

In message ,
Randall Ainsworth wrote:

In article , George
Preddy wrote:

That is exactly why the Foveon Pro 10M used in the SIgma SD9 and SD10
are also used for exacting scientific applications like the above,
while Bayers never are as the data they present is 75% made up during
interpolatative color processing. That's right, every pixel color in
every Bayer image is 75% guessed, while 100% of every pixel color in a
Foveon image was measured with perfect quantum accuracy precisely as
presented, much like the time keeping accuracy of an atomic
clock--absolutely perfect, all the time.

How do you keep a straight face with this bull****?

He actually believes it. SteveGeorge believes that if you arrange words
in a certain way, you can conjure up any reality you want.
--


John P Sheehy

"FLY135" fly_135(@ hot not not)notmail.com wrote in message hlink.net...
"George Preddy" wrote in message
om...
"Bart van der Wolf" wrote in message
...
"George Preddy" wrote in message
om...
SNIP
The precise spectral response of the 10M is published all over
the web, same for the 5M.


http://www.hanvision.com/contents/pr...0_2004_HVC.pdf

Which indicates that e.g. green (550 nm wavelength) is seen as 49% blue,
63%green, and 45% red.

The ideal spectral response curves overlay the Foveon curves almost
precisely (which is intentional of course), that is why Foveon is the
only option for scientitfically perfect work. Colors are quantum
accurate, all Bayer colors are guessed--100% of the output pixles are
totally wrong, thus all Bayer images are of exactly zero scientific
value.

They can't be totally wrong and I can prove it. Just take a picture and
make them more wrong, which wouldn't be possible if they were totally wrong.
Then the picture will become unrecognizable.

75% guessed pixels using values that are interpolated smack dab
between their two neighbors isn't unrecognizable, it is just horribly
low optical resolution.

You don't understand any of this.

In rec.photo.equipment.35mm George Preddy wrote:

75% guessed pixels using values that are interpolated smack dab
between their two neighbors isn't unrecognizable, it is just horribly
low optical resolution.

You don't understand any of this.

No its you who don't understand how bayer sensors work and more importantly,
why they work. Which causes you talk lots of bull****.

--
Sander

+++ Out of cheese error +++

"George Preddy" wrote in message
om...
"Bart van der Wolf" wrote in message
...
"George Preddy" wrote in message
om...
SNIP
The precise spectral response of the 10M is published all over
the web, same for the 5M.


http://www.hanvision.com/contents/pr...0_2004_HVC.pdf

Which indicates that e.g. green (550 nm wavelength) is seen as 49% blue,
63%green, and 45% red.

The ideal spectral response curves overlay the Foveon curves almost
precisely (which is intentional of course), that is why Foveon is the
only option for scientitfically perfect work. Colors are quantum
accurate, all Bayer colors are guessed--100% of the output pixles are
totally wrong, thus all Bayer images are of exactly zero scientific
value.

Hmmmm. Tell that to the astronomers.

"someone" wrote in message ...
"George Preddy" wrote in message
om...

The ideal spectral response curves overlay the Foveon curves almost
precisely (which is intentional of course), that is why Foveon is the
only option for scientitfically perfect work. Colors are quantum
accurate, all Bayer colors are guessed--100% of the output pixles are
totally wrong, thus all Bayer images are of exactly zero scientific
value.

Hmmmm. Tell that to the astronomers.

"The astronomers" always use the Sigma/Foveon method of capturing full
RGB at every pixel location, usually by taking one red exposure, then
one green, then one blue for full-capture RGB at every pixel location.
Nothing else will do for color-accurate work.

Foveon is the only color-accurate option in the DSLR format, subtle
hues are pure perfection due to Foveon's quantum mechanical color
precision--no glued-on interpolated plastic filters here...

http://www.pbase.com/imageprocessing/foveon_color_moon

In article , George
Preddy wrote:

Foveon is the only color-accurate option in the DSLR format, subtle
hues are pure perfection due to Foveon's quantum mechanical color
precision--no glued-on interpolated plastic filters here...

Hey George...glue this on...