Interesting Question about D2X sensors

Nikon are going to great lengths to explain how they capture 12
megapixels of data with their new "dual" sensor in the D2X. They are
describing their sensor's photo collector points of the newly released
Pro D2X cameras as being 2 different types/sizes of collector points...

Sigma did the same with their Foveon sensor SD9 cameras. I think because
Nikon collect RGB data from each site, they cannot be lumped in with the
Foveon "invention" of sensor size. Just the same, the Nikon sensor is
different from a traditional bayer sensor as we know it in a Canon
camera. How different is not as clear as it should be.

We are aware that smaller photo receptors have their own unique
problems. Is using two different size receptors in the way inkjet
printer makers get nicer looking images by using different size droplets
of ink, have Nikon discovered how to make a high resolving sensor in a
small size?

So here's the question of the day for thinking people: How many sensors
are in a D2X Nikon to achieve 12 megapixel images? Careful now... It's a
loaded question!

--
Douglas,
You never really make it on the 'net
until you get your own personal Troll.
Mine's called Chrlz. Don't feed him, he bites!

pixby wrote:

Nikon are going to great lengths to explain how they capture 12
megapixels of data with their new "dual" sensor in the D2X. They are
describing their sensor's photo collector points of the newly released
Pro D2X cameras as being 2 different types/sizes of collector points...

Where are they doing that, exactly?

Sigma did the same with their Foveon sensor SD9 cameras. I think because
Nikon collect RGB data from each site, they cannot be lumped in with the
Foveon "invention" of sensor size. Just the same, the Nikon sensor is
different from a traditional bayer sensor as we know it in a Canon
camera. How different is not as clear as it should be.

It's a regular Bayer sensor. I don't know what you're talking about.

We are aware that smaller photo receptors have their own unique
problems. Is using two different size receptors in the way inkjet
printer makers get nicer looking images by using different size droplets
of ink, have Nikon discovered how to make a high resolving sensor in a
small size?

Why would this have anything to do with a D2x? They aren't using two
different sizes of photo receptors.

So here's the question of the day for thinking people: How many sensors
are in a D2X Nikon to achieve 12 megapixel images? Careful now... It's a
loaded question!

There's one sensor, with 12.8 million photo detectors.

--
Jeremy |

In article ,
says...
There's one sensor, with 12.8 million photo detectors.

Jeremy: if you want to get into a long, useless discussion... this is
it.

Dougie is off his freaking rocker and doesn't believe any published
specs... nor common sense... nor appeals to his humanity. Next time he
rattles off about the D2X sensor, just walk away!
--
http://www.pbase.com/bcbaird

1: This is NOT a very interesting question
2: Who gives a **** anyway?


"pixby" wrote in message
...
Nikon are going to great lengths to explain how they capture 12 megapixels
of data with their new "dual" sensor in the D2X. They are describing their
sensor's photo collector points of the newly released Pro D2X cameras as
being 2 different types/sizes of collector points...

Sigma did the same with their Foveon sensor SD9 cameras. I think because
Nikon collect RGB data from each site, they cannot be lumped in with the
Foveon "invention" of sensor size. Just the same, the Nikon sensor is
different from a traditional bayer sensor as we know it in a Canon camera.
How different is not as clear as it should be.

We are aware that smaller photo receptors have their own unique problems.
Is using two different size receptors in the way inkjet printer makers get
nicer looking images by using different size droplets of ink, have Nikon
discovered how to make a high resolving sensor in a small size?

So here's the question of the day for thinking people: How many sensors
are in a D2X Nikon to achieve 12 megapixel images? Careful now... It's a
loaded question!

--
Douglas,
You never really make it on the 'net
until you get your own personal Troll.
Mine's called Chrlz. Don't feed him, he bites!

In message ,
Jeremy Nixon wrote:

Sigma did the same with their Foveon sensor SD9 cameras. I think because
Nikon collect RGB data from each site, they cannot be lumped in with the
Foveon "invention" of sensor size. Just the same, the Nikon sensor is
different from a traditional bayer sensor as we know it in a Canon
camera. How different is not as clear as it should be.

It's a regular Bayer sensor. I don't know what you're talking about.

I just looked quickly through the latest version of dcraw.c, and it
looks pretty normal except for one thing; it seems to have four
different color filters. The scaling factors for the sensitivities are
pre_mul(n), where n is usually 0 for red, 1 for green, and 2 for blue,
with green (1) usually unstated for each camera, assumed to be 1.0. The
D2X has pre_mul() values for 0, 1, and 3. Very few cameras have 4
multiplier values.
--


John P Sheehy

it looks pretty normal except for one thing; it seems to have four
different color filters.

Perhaps it is like the Sony F828 sensor, which was an RGBE (E=Emerald)
sensor, rather than the usual RGBG..

But anyway, this is not related to pixby/Douglas' delusion that the D2X
interpolates from 6Mp to 12Mp (grin). As is well known to everyone but
him, the sensor uses a high-speed *crop* mode, where it simply does not
read data from about half of the sensor to speed it up - at the cost of
image size.

wrote:

I just looked quickly through the latest version of dcraw.c, and it
looks pretty normal except for one thing; it seems to have four
different color filters. The scaling factors for the sensitivities are
pre_mul(n), where n is usually 0 for red, 1 for green, and 2 for blue,
with green (1) usually unstated for each camera, assumed to be 1.0. The
D2X has pre_mul() values for 0, 1, and 3. Very few cameras have 4
multiplier values.

Is what you're looking at the same as the TIFF CFAPattern? If so, 3
would be cyan. However, according to the metadata in my DNG files, the
CFA layout is given as 0,1,1,2 (R/G/G/B), suggesting a standard layout.
But if the values you're talking about are something else, I'm not sure
what to look for; the difference could be in the color matrices.

--
Jeremy |

Brian Baird wrote:
In article ,
says...

There's one sensor, with 12.8 million photo detectors.


Jeremy: if you want to get into a long, useless discussion... this is
it.

Dougie is off his freaking rocker and doesn't believe any published
specs... nor common sense... nor appeals to his humanity. Next time he
rattles off about the D2X sensor, just walk away! ;

Ah, yes... Another poster so convinced he knows it all, he just presumes
his square world is the only one existing. Pity poor old Brian when he
gets to the edge. Jeremy is wasting his time... Been in my kill file
because of his insults. You'll be the next to go Brian, right along with
canongirlie.

Prey tell, Brian, how do you (intentionally) manufacturer a sensor with
different sized photo receptors?

--
Douglas,
You never really make it on the 'net
until you get your own personal Troll.
Mine's called Chrlz. Don't feed him, he bites!

pixby wrote:

Jeremy is wasting his time... Been in my kill file because of his insults.

Not wasting at all. I don't answer your questions for *your* benefit, after
all. If you want to go on believing that the camera has different sized
photo sensors, that's up to you, but I'd hate to see anyone else think your
delusions have any merit.

You'll be the next to go Brian, right along with canongirlie.

Pity you're missing the answers you wanted when you posted.

--
Jeremy |

In message ,
Jeremy Nixon wrote:

wrote:

I just looked quickly through the latest version of dcraw.c, and it
looks pretty normal except for one thing; it seems to have four
different color filters. The scaling factors for the sensitivities are
pre_mul(n), where n is usually 0 for red, 1 for green, and 2 for blue,
with green (1) usually unstated for each camera, assumed to be 1.0. The
D2X has pre_mul() values for 0, 1, and 3. Very few cameras have 4
multiplier values.

Is what you're looking at the same as the TIFF CFAPattern? If so, 3
would be cyan. However, according to the metadata in my DNG files, the
CFA layout is given as 0,1,1,2 (R/G/G/B), suggesting a standard layout.
But if the values you're talking about are something else, I'm not sure
what to look for; the difference could be in the color matrices.

It could also be that every other green has a different sensitivity.

Do you know where I can download sample RAW files?
--


John P Sheehy