From: acl on
On Apr 2, 7:52 am, "David J. Littleboy" <davi...(a)gol.com> wrote:

> Measuring three colors at each point costs you sqrt(3) in dynamic range and
> noise and makes raw files three times larger.

Why do you say sqrt(3)? I do not remember seeing any data about
saturation capacities in electrons of these detectors.

From: J. Clarke on
Thomas T. Veldhouse wrote:
> J. Clarke <jclarke.usenet(a)cox.net> wrote:
>> Thomas T. Veldhouse wrote:
>>> nospam <nospam(a)nospam.invalid> wrote:
>>>> FOR IMMEDIATE RELEASE
>>>>
>>>> 37 Megapixel Direct Image Sensor brings the revolutionary patented
>>>> Foveon X3 Full-Color Technology to Nikon's forthcoming full frame
>>>> Digital SLR, the Nikon D3F.
>>>>
>>>
>>> You wasted a lot of time on this silly joke.
>>
>> Not nearly as much as Google did on _their_ April Fool joke. And
>> then there was Trump's . . .
>>
>
> While the OPs wasn't all that funny or unanticipated, I am interested
> to find out what Google's and Trump's joke was ;-)

Someone else has already posted a link to Google's. Here's Trump's
http://www.msnbc.msn.com/id/17904995/. Been advertising it for going on
a month--it's more April foolery than April fool since the head shaving
actually did take place but I wonder to what extent the outcome was
pre-orchestrated.

Then there's Lee Valley Tools
http://www.leevalley.com/home/Search.aspx?c=1&action=n for their
previous three offerings and
http://www.leevalley.com/wood/page.aspx?p=56737&c=1 for this year's.

--
--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)


From: Mark� on
Savageduck wrote:
> Thomas T. Veldhouse wrote:
>> J. Clarke <jclarke.usenet(a)cox.net> wrote:
>>> Thomas T. Veldhouse wrote:
>>>> nospam <nospam(a)nospam.invalid> wrote:
>>>>> FOR IMMEDIATE RELEASE
>>>>>
>>>>> 37 Megapixel Direct Image Sensor brings the revolutionary patented
>>>>> Foveon X3 Full-Color Technology to Nikon's forthcoming full frame
>>>>> Digital SLR, the Nikon D3F.
>>>>>
>>>> You wasted a lot of time on this silly joke.
>>> Not nearly as much as Google did on _their_ April Fool joke. And
>>> then there was Trump's . . .
>>>
>>
>> While the OPs wasn't all that funny or unanticipated, I am
>> interested to find out what Google's and Trump's joke was ;-)
>>
> Not quite Google's joke, but probably a joker using Google as
> camouflage. http://www.google.com/tisp/install.html

Actually it was Google's joke.
That page was linked on Google's main search page.
:)

--
Images (Plus Snaps & Grabs) by Mark� at:
www.pbase.com/markuson


From: cjcampbell on
On Apr 2, 9:30 am, "Thomas T. Veldhouse" <veld...(a)yahoo.com> wrote:
> cjcampbell <christophercampb...(a)hotmail.com> wrote:
>
> > Then there was Thom Hogan's April Fool joke. Claimed that his
> > equipment was getting heavier from all the photons it had captured.
> > Photons have no mass, but they are converted to electrons, which
> > do.... :-)
>
> Interesting twist on physics ... excitement = creation ;-)
>

A good April Fool's joke should have some inaccurate physics in it.
Plausible, but inaccurate.

From: John Sheehy on
"acl" <achilleaslazarides(a)yahoo.co.uk> wrote in
news:1175535531.207412.313090(a)e65g2000hsc.googlegroups.com:

> On Apr 2, 7:52 am, "David J. Littleboy" <davi...(a)gol.com> wrote:
>
>> Measuring three colors at each point costs you sqrt(3) in dynamic
>> range and noise and makes raw files three times larger.
>
> Why do you say sqrt(3)? I do not remember seeing any data about
> saturation capacities in electrons of these detectors.

What he's saying is that the shot noise in each layer in each RGB sensel
will be higher by that factor, because only 1/3 of the photons are captured
in each level. For the Foveon used in the SD9 and 10, that is probably an
issue, as color has to be converted from very unsaturated RAW data. If
that were not an issue, however, I don't think the shot noise would be much
of an issue, because the Bayer shot noise, though less in each sample, is
bigger in height and width, making it just as strong, visually. This can
actually be emulated - I'll put it on my list of things to try when I find
lots of time.


--

<>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<>
John P Sheehy <JPS(a)no.komm>
><<> <>>< <>>< ><<> <>>< ><<> ><<> <>><
First  |  Prev  |  Next  |  Last
Pages: 1 2 3 4 5 6 7 8 9
Prev: low light
Next: Bayer filter removal