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If I downsize a 1DsMk3 image to 10 MP's...

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Maybe it will cleaner image than the original crop (n.t.)

--

Best Regards,
PhotoJoe

:: Shoot in RAW because memory is cheap, but memories are priceless. ::
 
Pay $11, 200 (Aus) more than a 40D to get 10 megapixels

= PRICELESS!!!
 
sorry, couldn't resist

as a pom in vienna, I racked my brain for minutes and minutes trying to unravel the meaning of ROFL - is it an ozzie expression or universal - p'raps I'm too old and behind the times.
I am sure a censored translation could be provided...

Kevin
(LOL)
 
thanks Benjamin

of course - should have been obvious.....
"Rene Ord for Lommepengene"

:-)))

kevin
 
Presumably you should get some advantage by averaging pixels. But it probably depends on the characteristics of the noise and the approach you use for removing it. In past discussions that involved people who owned both the 1D Mark II and 1Ds Mark II it proved very difficult to get any consensus on how they compared on noise. Generally, it is difficult to get by the difference between those who want to stand in the same place with the same lens and compare the cameras pixel to pixel and those who want to get the same image on both sensors and determine what advantage you get from the bigger sensor.
--
David Jacobson
http://www.pbase.com/dnjake
 
There was a slight increase in sharpness and less noise but there were 100,000 less individual colours in the reworked image. On the whole it looked pretty good but there was a lot of detail sacrificed. For printing though, I don't think the differences would really be noticeable unless you went pretty large.

My unaltered/processed 1Ds2 images look extremely sharp when viewed at 50% viewing size on the monitor but if I resize the image to 50% and view the result at 100% image size, the sharpness is lost again.

If I view the resized image at 50% then the image sharpens up again. I suppose it's an illusion caused by the monitor
I hope you get what I mean.

--
It's an L of a life, this photography lark

http://www.freelancephotographic.net/
 
Here's my thinking. When I need the resolution, 21MP will be tremendous medium-format-film-like resolution. Norman Koren has written that he feels 21MP is the optimum resolution for a FF sensor.

If I need reach for sports or nature, I can get the equivalent of the 1.6 cro at 10 MP. Plenty of rez. If I need more DR, or less noise, I can downsize to 10MP or less.

The sRaw size is over 5 MP of resolution. Some predict that that file will have almost two stops more resolution.

5 FPS is plenty for me.
dnjake said:
Presumably you should get some advantage by averaging pixels. But it
probably depends on the characteristics of the noise and the approach
you use for removing it. In past discussions that involved people
who owned both the 1D Mark II and 1Ds Mark II it proved very
difficult to get any consensus on how they compared on noise.
Generally, it is difficult to get by the difference between those who
want to stand in the same place with the same lens and compare the
cameras pixel to pixel and those who want to get the same image on
both sensors and determine what advantage you get from the bigger
sensor.
--
David Jacobson
http://www.pbase.com/dnjake
Click to expand...
 
Took Phil's noise stamp tests from his 1Ds2 review, and I reduced the ISO 3200 sample to 70% of its original size. I calculated that this would be equivalent to downsizing a full frame image to 8MP. The resultant noise is almost the same amount as the 1Ds2's ISO 1600 stamp. Just slightly more.

So, in conclusion, I estimate that, if I downsize a 1Ds3 image to 10MP's, the noise improvement would be close to a stop, just slightly less.
dnjake said:
Presumably you should get some advantage by averaging pixels. But it
probably depends on the characteristics of the noise and the approach
you use for removing it. In past discussions that involved people
who owned both the 1D Mark II and 1Ds Mark II it proved very
difficult to get any consensus on how they compared on noise.
Generally, it is difficult to get by the difference between those who
want to stand in the same place with the same lens and compare the
cameras pixel to pixel and those who want to get the same image on
both sensors and determine what advantage you get from the bigger
sensor.
--
David Jacobson
http://www.pbase.com/dnjake
Click to expand...
 
IMHO, the most relevant test is to run the 21 MP image through a good noise processor (such as Noiseware or Noise Ninja) and then downsample to 10 MP.

Finally compare to a 10 MP image of the same motive shot with a 10 MP camera and run through the same noise processing software.

A few experiments will reveal how much more agressive settings can be used when processing the 21 MP file, and still get the same amount of detail in the final image.

Once those settings are known, the 10 MP file and the downsampled 21 MP file can be compared for noise levels.

David
A Aquacelli said:
James L Wilson said:
A Aquacelli said:
How much of an improvement in noise would I see? A stop?
Click to expand...
None, nada, no change...

--
.
‹(•¿•)›

JimWilson, Boca Raton, FL, USA.
http://www.rumor-page.com
http://www.FAUdigital.com

Click to expand...
Click to expand...
 
James L Wilson said:
There is no noise reduction when an image is re-sampled...
With CMOS each pixel has its noise associated with it....
Using 1/2 of the pixels, does not give improved noise performance.
There is no calculation, as the premise is false.
Click to expand...
You throw away half the pixels and you throw away half the noise which equates to one stop of percieved improvement in noise amount.

You throw away all the pixels and the noise is gone. Pretty obvious ;)

--
Anders

Some of my pictures can be seen at;
http://teamexcalibur.se/US/usindex.html

event photography and photo journalism
 
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