NOISE

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On 13 Feb 2005 09:06:23 -0800, "Scott W" <biphoto@hotmail.com> wrote:


>The histogram for the blue channel of the leaves looks just like I
>would think it would have to. You have an image with a lot of blue and
>yellow. As for the blue being bottomed out this is not too much of a
>surpise, yellows often have close to zero blue in them and it is likely
>that the raw converter pushed the black level up just a bit off zero.
>
>Do you have the raw file from this image, I would love to have a look
>at it.


Yes, somewhere... it'll take a moment to find.
I'll email it to you privately -- if you can
handle a 6M attachment or so...

Even so... I have lots of roughly similar images
taken with C41 (color negative) film and have not
seen a similar bottoming-out of the blue.


rafe b.
http/www.terrapinphoto.com

 

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"Kevin McMurtrie" <mcmurtri@dslextreme.com> wrote:
> Stacey <fotocord@yahoo.com> wrote:
> >
> > It was a 10D that had this "waxy" look I didn't care for. I think it's
> > more what type of sensor and how they process it that does this. I
process
> > the Images now with NO noise reduction and only apply it selectively is
> > it's really needed. I'd rather see some noise than this waxy look.
>
> Strange. I haven't had that problem on a Canon 300D -

Neither has anyone else. Nor with any other Canon dSLR. Stacey's simply
wrong on this.

David J. Littleboy
Tokyo, Japan

 

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On Sun, 13 Feb 2005 17:31:05 +0900, "David J. Littleboy"
<davidjl@gol.com> wrote:

>
>"Kevin McMurtrie" <mcmurtri@dslextreme.com> wrote:
>> Stacey <fotocord@yahoo.com> wrote:
>> >
>> > It was a 10D that had this "waxy" look I didn't care for. I think it's
>> > more what type of sensor and how they process it that does this. I
>process
>> > the Images now with NO noise reduction and only apply it selectively is
>> > it's really needed. I'd rather see some noise than this waxy look.
>>
>> Strange. I haven't had that problem on a Canon 300D -
>
>Neither has anyone else. Nor with any other Canon dSLR. Stacey's simply
>wrong on this.
>

Mostly I'm wondering how a 13.0 x 17.3 mm sensor
with 8 million pixels is going to deliver a better
quality image than the 10D's 15.1 x 22.7 mm sensor
which only supplies 6 million pixels.

The unit sensor area works out to almost exactly
half in the Oly (2.8E-5 mm^2 vs. 5.7E-5.)

But Stacey is careful to describe the Oly's
advantages in terms that defy measurement or
verification.


rafe b.
http/www.terrapinphoto.com

 

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In message <mcmurtri-6F79A5.22494812022005@corp-radius.supernews.com>,
Kevin McMurtrie <mcmurtri@dslextreme.com> wrote:

>1600 - Noise and noise reduction badly damages fine details

Does anyone know of any links to a RAW 300D ISO1600 file? I'd like to
look at one and see if it is really ISO 800 pushed, like the 10D.
--

<>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<>
John P Sheehy <JPS@no.komm>
><<> <>>< <>>< ><<> <>>< ><<> ><<> <>><

 

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In message <cun38r$j20$1@nnrp.gol.com>,
"David J. Littleboy" <davidjl@gol.com> wrote:

>Neither has anyone else. Nor with any other Canon dSLR. Stacey's simply
>wrong on this.

It happens when people over-noise-reduce. This is done by some P&S
cameras, but not DSLRs, as far as I know.
--

<>>< ><<> ><<> <>>< ><<> <>>< <>>< ><<>
John P Sheehy <JPS@no.komm>
><<> <>>< <>>< ><<> <>>< ><<> ><<> <>><

 

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Stacey wrote:
> Scott W wrote:
>
> > Could you post a link to one of the images off of the 10D that look
> > waxy to you?
> >
>
>
> Don't take this personally, again have you tried shooting with the
other
> dSLR's to see what they produce "look" wise or just buy a canon
because
> everyone else does? I just didn't care for the "look" of the canon
10D test
> images I shot. If you are happy, don't sweat it. I did buy a canon
printer
> even though "everyone" uses Epson too.
>
> David and Rafe love to bash the camera I chose and have never even
seen one
> much less shot with one so I could care less what they think! I know
I
> love the images I'm getting from mine and I DID shoot with the other
> options myself to compare first. Maybe if ISO 800+ noise was my main
> criteria for "perfection" I would have chosen something else?
>
> --
>
> Stacey
In fact I did a lot of research before buying the 20D both reading
reviews and looking at photos from it and other DSLR on Pbase.com

The my question was do you have a link to one of these waxy photos, it
was not meant to say they don't exist but rather so I can tell what
you are referring to.

Scott

 

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"rafe bustin" <rafeb@speakeasy.net> wrote in message
newsc4v01ljr1ee5lekmf9t48jikve978d49f@4ax.com...
SNIP
> Even so... I have lots of roughly similar images
> taken with C41 (color negative) film and have not
> seen a similar bottoming-out of the blue.

IMHO it is caused by the lack of sharpening (really), it may sound odd
but a bit of sharpening will raise the number of bright blue channel
pixels. I just tried it on the JPEG crop and it changed a lot.

Bart

 

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"rafe bustin" <rafeb@speakeasy.net> wrote:
> "David J. Littleboy" <davidjl@gol.com> wrote:
> >"Kevin McMurtrie" <mcmurtri@dslextreme.com> wrote:
> >> Stacey <fotocord@yahoo.com> wrote:
> >> >
> >> > It was a 10D that had this "waxy" look I didn't care for. I think
it's
> >> > more what type of sensor and how they process it that does this. I
> >process
> >> > the Images now with NO noise reduction and only apply it selectively
is
> >> > it's really needed. I'd rather see some noise than this waxy look.
> >>
> >> Strange. I haven't had that problem on a Canon 300D -
> >
> >Neither has anyone else. Nor with any other Canon dSLR. Stacey's simply
> >wrong on this.
>
> Mostly I'm wondering how a 13.0 x 17.3 mm sensor
> with 8 million pixels is going to deliver a better
> quality image than the 10D's 15.1 x 22.7 mm sensor
> which only supplies 6 million pixels.

But you've misunderstood Stacey's point: more noise makes a better looking,
higher dynamic range image than those plasticy low-noise images that Canon
produces. ROFL.

> The unit sensor area works out to almost exactly
> half in the Oly (2.8E-5 mm^2 vs. 5.7E-5.)

That sounds off. Canon = 15 x 22.5 = 337.5 vs Oly = 13 x 17.3 = 224.9 =? Oly
= 67% of the Canon. Although the _effective_ area of the pixel also depends
on the microlenses.

> But Stacey is careful to describe the Oly's
> advantages in terms that defy measurement or
> verification.

Right. "As good as medium format". Not.

David J. Littleboy
Tokyo, Japan

 

[Stacey]

Archived from groups: rec.photo.digital (More info?)

Kevin McMurtrie wrote:

> In article <378a87F58ttueU2@individual.net>,
> Stacey <fotocord@yahoo.com> wrote:
>>
>> It was a 10D that had this "waxy" look I didn't care for. I think it's
>> more what type of sensor and how they process it that does this. I
>> process the Images now with NO noise reduction and only apply it
>> selectively is it's really needed. I'd rather see some noise than this
>> waxy look.
>
> Strange. I haven't had that problem on a Canon 300D -
>

Ever shot with any other dSLR?

This is just my opinion of the images I got from that camera and of course
is just my -subjective- opinion. I tried several different dSLR's and just
didn't care for the look from the 10D I used, YMMV. Some people rate
"perfection" on noise looking at 100% crops, that's not my main objective.


--

Stacey

 

[Guest]

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In article <37ao88F4q1kcaU1@individual.net>,
Stacey <fotocord@yahoo.com> wrote:

> Kevin McMurtrie wrote:
>
> > In article <378a87F58ttueU2@individual.net>,
> > Stacey <fotocord@yahoo.com> wrote:
> >>
> >> It was a 10D that had this "waxy" look I didn't care for. I think it's
> >> more what type of sensor and how they process it that does this. I
> >> process the Images now with NO noise reduction and only apply it
> >> selectively is it's really needed. I'd rather see some noise than this
> >> waxy look.
> >
> > Strange. I haven't had that problem on a Canon 300D -
> >
>
> Ever shot with any other dSLR?
>
> This is just my opinion of the images I got from that camera and of course
> is just my -subjective- opinion. I tried several different dSLR's and just
> didn't care for the look from the 10D I used, YMMV. Some people rate
> "perfection" on noise looking at 100% crops, that's not my main objective.

I take part in a photography group where people share their photos. The
group ranges from point'n'shoot digital to large format film, hobbyists
to professionals. Sometimes photos are harmed by poor equipment but
most of the quality depends the person using it. I haven't seen any
problems with any Canon or Nikon DSLR.

 

[Stacey]

Archived from groups: rec.photo.digital (More info?)

David J. Littleboy wrote:

>>
>> Strange. I haven't had that problem on a Canon 300D -
>
> Neither has anyone else. Nor with any other Canon dSLR. Stacey's simply
> wrong on this.
>

And the canonites roll in...

Why would I have bought a E300 if I could have bought either one ( I owned
no lenses), used a 10D for a week and wasn't impressed enough to go buy
one?

I know you and the other canon fanatics judge a camera by noise graphs at
1600 ISO, looking at 200% crops and what "pros" say you should be using ,
I looked at the end results in print and =personally= liked the results
from the olympus better. The canon images just look "waxy" to me. YMMV.
--

Stacey

 

[Stacey]

Archived from groups: rec.photo.digital (More info?)

Scott W wrote:

> Could you post a link to one of the images off of the 10D that look
> waxy to you?
>


Don't take this personally, again have you tried shooting with the other
dSLR's to see what they produce "look" wise or just buy a canon because
everyone else does? I just didn't care for the "look" of the canon 10D test
images I shot. If you are happy, don't sweat it. I did buy a canon printer
even though "everyone" uses Epson too.

David and Rafe love to bash the camera I chose and have never even seen one
much less shot with one so I could care less what they think! I know I
love the images I'm getting from mine and I DID shoot with the other
options myself to compare first. Maybe if ISO 800+ noise was my main
criteria for "perfection" I would have chosen something else?

--

Stacey

 

[Stacey]

Archived from groups: rec.photo.digital (More info?)

paul wrote:

> Scott W wrote:
>
>
> Here's a nice noisy detail with & without noise reduction, RAW & jpeg:
>
<http/www.edgehill.net/1/?SC=go.php&DIR=Misc/photography/raw-vs-jpg&PG=1&PIC=3>
>

?? How can you "like" either of these blown to 400% images?

--

Stacey

 

[Confused]

Archived from groups: rec.photo.digital (More info?)

In message <pMOdnXcpp839KpLfRVn-rg@speakeasy.net>
paul <paul@not.net> wrote:

I SNIPED the film grain vs CCD/CMOS photon related "color speckles"
discussion, and then selectively gathered phrases to form a basis for
asking a couple questions. And I am not specifically addressing Paul,
because this subject has been an area of confusion for me. <G>

> ...noise comparisons...shoot a grey card...
> ...high ISO images have colored speckles.

(For the sake of discussion, I'll use "noise" defined as

noise : randomly generated colored speckles
generated by digital cameras
)

ISO 100 in low light also creates the same noise. Why is that?

I had a 1D Mark II for 2 days and the images had less noise than the
20D. Does the 1Ds Mark II have less noise than the 1D Mark II?

> I might guess film has a soft blurry color noise
> behind the grain whereas digital has a per-pixel noise.

How can there be "per pixel" noise, when the noise is randomly
distributed around a pixel that is the correct color?

This seems backwards. It's more like the sensor elements have an
accuracy tolerance that varies widely from pixel to pixel. (Design
and manufacturing compromises?)

Then there is the firmware imposed noise dictated by marketing
departments in order to maintain wide price gap between the entry
level (300D/20D) and professional (1D(s) Mark II) cameras and backs.

Speaking of purposely crippling the firmware, there is NO technical
roadblock keeping zero chrominance sub-sampling and near-lossless
quality level jpegs out of digital cameras. (Corporate greed is the
motivating factor. ;^)

Jeff

 

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On Sun, 13 Feb 2005 23:51:14 -0500, Stacey <fotocord@yahoo.com> wrote:


>David and Rafe love to bash the camera I chose and have never even seen one
>much less shot with one so I could care less what they think! I know I
>love the images I'm getting from mine and I DID shoot with the other
>options myself to compare first. Maybe if ISO 800+ noise was my main
>criteria for "perfection" I would have chosen something else?


If you didn't spend half your time on this NG
defending your choice of DSLR, I'd never have
taken notice, Stacey.

I'm not that much of a gearhead myself.

I'm a long time Nikon (film) SLR user myself,
but my digicams are Canon. Brand loyalty
means squat to me.

I worked for a year with a Canon G2 before
deciding to go with the 10D.

My main objection to your argument is your
assumption that the rest of us choose our
gear out of ignorance or peer pressure.



rafe b.
http/www.terrapinphoto.com

 

[Paul]

Archived from groups: rec.photo.digital (More info?)

Stacey wrote:

> paul wrote:
>
>>Here's a nice noisy detail with & without noise reduction, RAW & jpeg:
>>
> <http/www.edgehill.net/1/?SC=go.php&DIR=Misc/photography/raw-vs-jpg&PG=1&PIC=3>
>
>
> ?? How can you "like" either of these blown to 400% images?


"Nice" as in "plenty visible for the sake of discussion".

That was shot in low ISO but low light and exaggerated with curves in
PS. 400% so that it is not a subjective squinty confusion but very clear
exactly what the noise looks like.

 

[Guest]

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Stacey wrote:
>
> I've just about decided to NEVER post anything that isn't -pro canon- as it
> just creates too much flak here, enjoy your camera and just ignore my past
> coments.

It'd be nice if no one posted truly either pro or con any brand, but
that ain't going to happen. There are some who can discuss pro's and
cons of cameras, including the ones they are heavily invested in, both $
and psychically, without becoming emotional, or irrational, or,
particularly since this is usenet, insulting, and there are those of us
who can't.

It may be that the trick is to not fall into the various traps that exist.

I hope you won't diminish your posting, as you have a lot to say.

--
John McWilliams

 

[Marvin]

Archived from groups: rec.photo.digital (More info?)

Don Stauffer in Minneapolis wrote:
> secheese wrote:
>
>> On Sat, 12 Feb 2005 22:38:27 GMT, "Patrick Boch"
<snip>
>>
> Assume somehow I option a truly uniform background, and photograph it
> with film. I then scan the film with a microdensitometer with a very
> small aperture. If I then look at a plot of density vs horizontal
> position in frame, I will see some noise. Now, admittedly some of that
> will be electronic noise in the microdensitometer. However, for small
> apertures, some will be due to structure of film itself, and statistics
> of photon stream and photochemical process itself.
>
> Sure, larger densitometer apertures average/reduce noise, but we could
> do same exact thing with digital, though on a coarser basis.
>
> There is virtually NO measurement we can make in our universe that has
> zero noise (and photography basically involves measurement).

From my experience with microdensitometry, the main noise component might be called grain noise, analogous to photon noise.
Think of the microphotometer as if it were counting silver grains.

 

[Stacey]

Archived from groups: rec.photo.digital (More info?)

rafe bustin wrote:

> On Sun, 13 Feb 2005 23:51:14 -0500, Stacey <fotocord@yahoo.com> wrote:
>
>
>>David and Rafe love to bash the camera I chose and have never even seen
>>one
>>much less shot with one
>
> If you didn't spend half your time on this NG
> defending your choice of DSLR, I'd never have
> taken notice, Stacey.
>

Given the amount of bashing people give this camera (and any non-canon
camera) which I found from personal testing of several dSLR's to work MUCH
better than what people like yourself, who have never seen one, say you're
surprised? What if I posted than a 10D has so much noise it's unusable if I
had never even held on in my hands? You wouldn't coment? Or that the AF
doesn't work right etc etc.

You and David have made a BUNCH of posts about this camera system, so have
you used one yourself? Or do you judge image quality looking at graphs and
spec sheets? Here's something you might try, actually look at the results
you get from each one before you decide?


>
> I'm a long time Nikon (film) SLR user myself,
> but my digicams are Canon. Brand loyalty
> means squat to me.


??? Did you read what you just posted?

>
> I worked for a year with a Canon G2 before
> deciding to go with the 10D.


Because.... Couldn't be brand loyalty..

>
> My main objection to your argument is your
> assumption that the rest of us choose our
> gear out of ignorance or peer pressure.
>

More like you buy a camera from what someone else thinks of it.

I post I didn't care for the look of the images I got from a 10D and get
ATTACKED for having a subjective opinion? For saying there is more to image
"quality" that straight from the camera noise control? And instead of
actually discussing this, you and David once again turn to personal
insults. Why am I not surprised?
--

Stacey

 

[Stacey]

Archived from groups: rec.photo.digital (More info?)

paul wrote:

> Stacey wrote:
>
>> paul wrote:
>>
>>>Here's a nice noisy detail with & without noise reduction, RAW & jpeg:
>>>
>>
<http/www.edgehill.net/1/?SC=go.php&DIR=Misc/photography/raw-vs-jpg&PG=1&PIC=3>
>>
>>
>> ?? How can you "like" either of these blown to 400% images?
>
>
> "Nice" as in "plenty visible for the sake of discussion".
>
> That was shot in low ISO but low light and exaggerated with curves in
> PS. 400% so that it is not a subjective squinty confusion but very clear
> exactly what the noise looks like.

So what do the different ones look like at normal viewing like downsampled
to viewable size or upsampled for printing? If you can't see it there, who
cares?
--

Stacey