Dynamic Range -- what it is, what it's good for, and how much you 'need'

  • " The shoes fit you rather well. So, how about it -- do you want me to explain DR to you -- what it is, how it's measured, and what it's good for -- or would you rather just parade your ignorance in public? "
like a parading fool you speak to others of their supposed 'ignorance' and yet cant answer one apparently simple question. Wasnt your claim about 'some who were rather confused about what DR is and how it's measured"

you dont have a clue what you are talking about
if you did you could answer my very simple question

for people pretending to be 'educating' others here b/se they claim 1022 is some sort of special case, they should most certainly know what they are talking about, or they should stxx and peddle their poison somewhere where it is better appreciated

now this sham, this fraud, this pretence and lie should end. You serve no purpose on these questions as you cannot answer them and do not even possess the wit to defend yourself against them
While the ignorant entertainers posture with nothing but insults, I've been busy working on the discrepency between DxOMark's DR measure and Imatest's. As it turns out, DxOMark measures what DR is defined to be, and what I've said all along, whereas Imatest measures the DR of a processed photo:

http://forums.dpreview.com/forums/read.asp?forum=1018&message=39658528

So, just to make it clear to the cognitively challenged, I well understood what DxOMark was all about, but didn't know what Imatest was measuring. But what makes this so classic, is that neither you nor boggis new anything at all, except that they gave different results, and that, in your little minds, automatically made DxOMark's measure of DR "bogus".

It's one thing to be ignorant -- I was ignorant about Imatest, and am getting an education in the link above. It's quite another to parade your ignorance as a badge of honor, but, well, that's what makes The Entertainers' posts so entertaining, I suppose.
 
the full panoramic stenchorama hasnt hit this place yet, but it will
You're here, aren't you? And, aside from the "entertainment value" of your posts, what else is there to expect?
nothing to do with your likewise fraudulent claim

you have been asked 2 very pertinent questions seen above,
which you do not have the talent or the honesty to answer
Except I just did. Not that it matters, of course.
pick up your sandals at the door teach
its over
The only thing that's over is the hope that you and your fellow entertainers ever get a clue.
 
  • " The shoes fit you rather well. So, how about it -- do you want me to explain DR to you -- what it is, how it's measured, and what it's good for -- or would you rather just parade your ignorance in public? "
like a parading fool you speak to others of their supposed 'ignorance' and yet cant answer one apparently simple question. Wasnt your claim about 'some who were rather confused about what DR is and how it's measured"

you dont have a clue what you are talking about
if you did you could answer my very simple question

for people pretending to be 'educating' others here b/se they claim 1022 is some sort of special case, they should most certainly know what they are talking about, or they should stxx and peddle their poison somewhere where it is better appreciated

now this sham, this fraud, this pretence and lie should end. You serve no purpose on these questions as you cannot answer them and do not even possess the wit to defend yourself against them
While the ignorant entertainers posture with nothing but insults,
you speak to me of insults
what exactly are ignorant entertainers, cognitively challenged,
I've been busy working on the discrepency between DxOMark's DR measure and Imatest's. As it turns out, DxOMark measures what DR is defined to be, and what I've said all along, whereas Imatest measures the DR of a processed photo:
you knew NOTHING about it
you had to ask for help on it
you were clueless as to what was going on and this is more pretence
http://forums.dpreview.com/forums/read.asp?forum=1018&message=39658528

So, just to make it clear to the cognitively challenged, I well understood what DxOMark was all about, but didn't know what Imatest was measuring. But what makes this so classic, is that neither you nor boggis new anything at all, except that they gave different results, and that, in your little minds, automatically made DxOMark's measure of DR "bogus".
i knew enough to ask the question
the 'fool' here didnt even think to ask it
and somehow you think that puts you in front
fraud
It's one thing to be ignorant -- I was ignorant about Imatest, and am getting an education in the link above. It's quite another to parade your ignorance as a badge of honor, but, well, that's what makes The Entertainers' posts so entertaining, I suppose.
--
Riley

any similarity to persons living or dead is coincidental and unintended
 
SNIP
Yes, if the read noise scales with the linear pixel dimensions, then the 'normalized' noise (like in DxO's 'print' figures) will be the same, and that's what I mean then talking about "same per area read noise" and "equally efficient" sensors. In your example, I'd say that sensor A is more efficient than sensor B.
Can you tell me how read noise does scale in reality (and why)?
 
SNIP
Yes, if the read noise scales with the linear pixel dimensions, then the 'normalized' noise (like in DxO's 'print' figures) will be the same, and that's what I mean then talking about "same per area read noise" and "equally efficient" sensors. In your example, I'd say that sensor A is more efficient than sensor B.
Can you tell me how read noise does scale in reality (and why)?
Well, it depends, but I'm not really the right person to explain this in detail. Emil (ejmartin) said a bit about it yesterday in another thread :

http://forums.dpreview.com/forums/read.asp?forum=1032&message=39654628

..and you can compare a lot of actual cameras here :

http://www.sensorgen.info/ (click on a camera to see more data)
 
SNIP
Yes, if the read noise scales with the linear pixel dimensions, then the 'normalized' noise (like in DxO's 'print' figures) will be the same, and that's what I mean then talking about "same per area read noise" and "equally efficient" sensors. In your example, I'd say that sensor A is more efficient than sensor B.
Can you tell me how read noise does scale in reality (and why)?
Well, it depends, but I'm not really the right person to explain this in detail. Emil (ejmartin) said a bit about it yesterday in another thread :

http://forums.dpreview.com/forums/read.asp?forum=1032&message=39654628

..and you can compare a lot of actual cameras here :

http://www.sensorgen.info/ (click on a camera to see more data)
Thanks for the info. I had a look a sensorgen but I couldn't see (at a glance) any such correlation.

From Emil's post I understand that for a given "generation of manufacturing process" there is no such correlation (which is what I would expect).
 
  1. The most efficient aspect ratio for a sensor is the aspect ratio closest to the aspect ratio of the displayed photo.
No it isn't. Not for "equivalence" purposes where the final crop is never considered.

I will assume that since you are going down this road of "post-capture cropping" that you do in fact realise your error.
A 4:3 rectangle inscribed in a circle with the same diameter as a 3:2 rectangle will have 4% more area. This does not mean "4% greater efficiency" unless the final photo is displayed at 4:3 or more square. If the photo is displayed 3:2 or more wide, then the 3:2 rectangle is "more efficient". This has been explained to you multiple times, but you still lack the cognitive capacity to understand it.

It really is that simple.
What is simple to see is that you are staying true to form when your errors are pointed out.

I notice Rikke is trying the approach of bringing in the magnitude of the uncertainties involved in the measurements.

It is strange that the final cropping and uncertainties of measurement involved never figure in "equivalence" until now. The lengths that some people will go to in order to avoid admitting error astounds me, frankly. This is a whopping 4% error, you clowns -- simply admit it like you did years ago and carry on with the correction.

Now you will no doubt both pretend indignation for getting called on this latest stupid fraud.

Carry on.
 
While the ignorant entertainers posture with nothing but insults, I've been busy working on the discrepency between DxOMark's DR measure and Imatest's.
You've been busy asking for others to explain the differences to you.
http://forums.dpreview.com/forums/read.asp?forum=1018&message=39641336

A not so subtle distinction.
As it turns out, DxOMark measures what DR is defined to be,
In engineering terms. Now, that's quite unsurprising.

The discrepancy in proffering lower engineering DR compared to DR obtained from the processed raw file is still unexplained.

(The argument is currently about "Tonal Range" vs "Dynamic Range", and the claim is that DxO's results must be correct even though they do not make sense in some instances. Bob Newman is arguing a "terminological" difference as the root cause, but appears to not see the underlying issue: http://forums.dpreview.com/forums/read.asp?forum=1018&message=39659400 )
and what I've said all along, whereas Imatest measures the DR of a processed photo:

http://forums.dpreview.com/forums/read.asp?forum=1018&message=39658528
Which can't, by definition, contain more DR than the source.

Yet we do appear to have that result compared with "DxO DR" for FourThirds cameras.
So, just to make it clear to the cognitively challenged, I well understood what DxOMark was all about, but didn't know what Imatest was measuring.
No sh*t.

We're all surprised that you had no idea what we meant by practical DR , achievable DR , or what a photographer would consider to be DR.

The worth of the argument is immaterial, what is germane in your mind is that we are disagreeing with your point of view -- and this can't be tolerated, even if you are subsequently proven to be wrong.
But what makes this so classic, is that neither you nor boggis new anything at all, except that they gave different results, and that, in your little minds, automatically made DxOMark's measure of DR "bogus".
The DxO DR measure doesn't align particularly well with reality. Any measure that diverges from reality is a bogus measure when applied to real results.

Our "little minds" can't handle the contortions required to square that circle, Joe. It requires a special type of psychology to believe that twisting reality to fit an ill-thought through pre-conception is the correct method of "enlightenment".
It's one thing to be ignorant -- I was ignorant about Imatest, and am getting an education in the link above. It's quite another to parade your ignorance as a badge of honor, but, well, that's what makes The Entertainers' posts so entertaining, I suppose.
What I find entertaining is your complete intellectual bankruptcy, as in evidence up-thread from my post here:
http://forums.dpreview.com/forums/read.asp?forum=1022&message=39659496
(With supporting strawman arguments from Rikke Rask.)

Yet you make the pretence of lecturing others. Pathetic.

Back to ignoring you, I guess. A shame, as you seemed to be moving toward a more reasonable approach -- a facsimile of a normal human being -- for a while there.
 
like a parading fool you speak to others of their supposed 'ignorance' and yet cant answer one apparently simple question. Wasnt your claim about 'some who were rather confused about what DR is and how it's measured"
GB is guilty of one thing in that he used the same term to describe both you and him, ignorant. While he indeed may have been so, your condition often exceeds ignorance and lands squarely in the realm of stupidity, the difference being that stupidity implies an unwillingness or inability to learn. If you weren't so intent on proving GB wrong or banning him from this forum you'd realize that the knowledge he does have is an asset to this or any forum. When you challenged him on his ignorance, he made an effort to find out that which he didn't know, and made no attempt to hide the fact. When he found out, he made his findings known as well.

Conversely, you recently made blind accusation against a relatively new forum member based on absolutely no scientific evidence at all, claiming the person was a troll. It was pointed out by one of your own associates that you might possibly be acting a little hastily, yet you continued to justify yourself. When you discovered you were WRONG, not just ignorant, you didn't even have the decency to publicly apologize. Yet you insist on posing the question below based on apparently a different set of standards than you hold yourself to, and with an obvious bias toward character assassination rather than any truth or knowledge seeking.
you dont have a clue what you are talking about
if you did you could answer my very simple question
There is a difference between not having a clue and not being able to answer one question. I've had college professors who were not able to answer mine without having to ask someone else, yet they could hardly be described as clueless.
for people pretending to be 'educating' others here b/se they claim 1022 is some sort of special case, they should most certainly know what they are talking about, or they should stxx and peddle their poison somewhere where it is better appreciated
He never claimed 1022 was a special case and you know it. Because you chose to take it that way says more about your foolish pride than it does about GB. Furthermore, to predicate your attacks on him on the assumption that he is responsible for knowing how every entity attempts to measure dynamic range is quite a stretch as he made no claim to that effect.
now this sham, this fraud, this pretence and lie should end. You serve no purpose on these questions as you cannot answer them and do not even possess the wit to defend yourself against them
Wit? such as the wit you possess?

Riley: 5 post user borne yesterday...i think its a setup, thats what i think

CollBaxter: He first post was to ask for help about a do it yourself wedding shoot seem genuine. Hell a wedding shoot I would have run a mile. If he does well lets at least give him a chance.. Maybe we are getting to paranoid. Even myself. Time will tell.

mrhodges2: If he is not a "troll", he's just been accused PUBLICLY of being one by the current THIRD top poster on this forum, on purely subjective and highly circumstantial evidence. That does not represent us very well to say the least, and should hardly be excused or tolerated. Riley has no authority to judge other people's motives and it is clearly contrary to forum rules. Basically, right now HE is the one guilty of trolling. Except he's not bashing equipment, he's bashing a PERSON, which is clearly worse.

Rriley:..well you are you and me is me emoticon - wink

Entirely different standard from the one you'd like to hold GB to.
While the ignorant entertainers posture with nothing but insults,
you speak to me of insults
what exactly are ignorant entertainers, cognitively challenged,
I've been busy working on the discrepency between DxOMark's DR measure and Imatest's. As it turns out, DxOMark measures what DR is defined to be, and what I've said all along, whereas Imatest measures the DR of a processed photo:
you knew NOTHING about it
you had to ask for help on it
you were clueless as to what was going on and this is more pretence
http://forums.dpreview.com/forums/read.asp?forum=1018&message=39658528

So, just to make it clear to the cognitively challenged, I well understood what DxOMark was all about, but didn't know what Imatest was measuring. But what makes this so classic, is that neither you nor boggis new anything at all, except that they gave different results, and that, in your little minds, automatically made DxOMark's measure of DR "bogus".
i knew enough to ask the question
the 'fool' here didnt even think to ask it
and somehow you think that puts you in front
It certainly does put him in front. You KNEW enough to ASK GB, and it was GB that made an inquiry and found you an answer. What knowledge he does have he attempts to share with those who are interested. You on the other hand would rather denigrate than educate, which only further serves to paint you as the buffoon you choose to be.
Wouldn't that term more adequately describe yourself and a certain cohort? You pass yourself off as an "expert" on who is and isn't a troll with no concrete evidence. A certain someone else describes DXO as "bogus". Yet the source you give credence to as having schooled GB says:

"Yes, that's basically correct, although Imatest has an additional problem (at least in the versions I have seen) where it does not properly compensate for the clipping of the negative going noise excursions as the grey patches approach black..."
Riley

any similarity to persons living or dead is coincidental and unintended
Any similarity to a rational, non-biased, trustworthy authority is likewise unintended?

Robert
 
someone opened the psycho bin again I see

--
Riley

any similarity to persons living or dead is coincidental and unintended
 
  1. The most efficient aspect ratio for a sensor is the aspect ratio closest to the aspect ratio of the displayed photo.
No it isn't. Not for "equivalence" purposes where the final crop is never considered.
Again, you are completely, and totally, wrong:

h ttp: www.josephjamesphotography.com/equivalence/index.htm#equivalence

In the event we are comparing systems with different aspect ratios (such as 4:3 vs 3:2), then we achieve the same framing by cropping one image to the the aspect ratio of the other (or crop both to a common aspect ratio).
I will assume that since you are going down this road of "post-capture cropping" that you do in fact realise your error.
I'm making no assumption when I say you are wrong with every word you post.
Now you will no doubt both pretend indignation for getting called on this latest stupid fraud.
The only "stupid fraud" here is you, and your fellow entertainers. Ieesh.
 
I've been busy working on the discrepency between DxOMark's DR measure and Imatest's. As it turns out, DxOMark measures what DR is defined to be, and what I've said all along, whereas Imatest measures the DR of a processed photo:
you knew NOTHING about it
you had to ask for help on it
you were clueless as to what was going on and this is more pretence
I knew nothing about Imatest, I asked, I got the answer. And when I don't know something, I ask, unlike parading around like a complete effing idiot like you and your fellow entertainers.

Case in point:

http://forums.dpreview.com/forums/read.asp?forum=1018&message=39658713

Yes, that's basically correct, although Imatest has an additional problem (at least in the versions I have seen) where it does not properly compensate for the the clipping of the negative going noise excursions as the grey patches approach black, which I cover in another post. This, as much as anything, is likely why Imatest measures higher DR than what DxOMark does.
i knew enough to ask the question
But I knew enough to get the answer. Now, do you know enough to get understand the answer?

http://forums.dpreview.com/forums/read.asp?forum=1018&message=39658460

Well? Do you?
the 'fool' here didnt even think to ask it
Because I did not know that Imatest gave different results than DxOMark.
and somehow you think that puts you in front
Yes -- in fact it does.
And yet, I was right all along, whereas you were just fishing for some way to discredit DxOMark, and show the fool once again.
It's one thing to be ignorant -- I was ignorant about Imatest, and am getting an education in the link above. It's quite another to parade your ignorance as a badge of honor, but, well, that's what makes The Entertainers' posts so entertaining, I suppose.
Yeah -- that.
 
(The argument is currently about "Tonal Range" vs "Dynamic Range", and the claim is that DxO's results must be correct even though they do not make sense in some instances. Bob Newman is arguing a "terminological" difference as the root cause, but appears to not see the underlying issue: http://forums.dpreview.com/forums/read.asp?forum=1018&message=39659400 )
It is? That's the argument? Becauseas I recall, the argument is about you calling DxOMark's Dr measures "bogus". And what did we find out? That, no, they are not bogus -- you were just full of it, as always:

http://forums.dpreview.com/forums/read.asp?forum=1018&message=39658713

I mean, hell, boggis -- you think that the aperture is the image circle, you think that 4:3 is "more efficient" than 3:2 even for a photo displayed at 3:2 and wider, you think -- well, scratch that -- no, you don't think at all, do you?
Yet you make the pretence of lecturing others. Pathetic.
Just ignorant buffoons like yourself and your fellow entertainers, who don't know squat, and go around making statement like "DxOMark is bogus" without any understanding of what's going on.
Back to ignoring you, I guess.
Excellent!
A shame, as you seemed to be moving toward a more reasonable approach -- a facsimile of a normal human being -- for a while there.
Whereas you are nothing even close to any of that. Now, make good on your "threat", and ignore me -- let those who have an interest and wish to learn, do so.

I mean, seriously -- in what way did your posts in this thread (or Rriley's) contribute in any way, shape, or form, to the understanding of DR? All you did was disrupt this thread with your posturing BS right from your very first post in this thread:

http://forums.dpreview.com/forums/read.asp?forum=1022&message=39616072

What Joe's good for, and how much we don't need him

But wait, Joe, isn't it all about "total light"?

How is it that an APS-C system can out-perform a 135 system? The 135 system has more total light.

Oh, this must be an example of reality kicking theory square in the wedding tackle. Thanks for clearing that up

Well, it's just as well you posted this, as I'm sure that nobody on the OSTF had any idea what DR was.

Clown.


That was your entry into this thread, and you have the stones to say to me, "A shame, as you seemed to be moving toward a more reasonable approach -- a facsimile of a normal human being -- for a while there."

Boggis, please make good on your "threat" to ignore me.
 
Can you tell me how read noise does scale in reality (and why)?
The reality is far more complex than simple scaling. All I'm saying is that "equally efficient sensors" means the same QE and that per-pixel read noise and saturation limit scale with pixel area throughout the ISO range.

That said, some sensors are pretty close -- e.g. the 5D2 and E5. I mean, they're so close, one might even think that Olympus copied the 5D2 sensor and just scaled it down.
 
I've been busy working on the discrepency between DxOMark's DR measure and Imatest's. As it turns out, DxOMark measures what DR is defined to be, and what I've said all along, whereas Imatest measures the DR of a processed photo:
you knew NOTHING about it
you had to ask for help on it
you were clueless as to what was going on and this is more pretence
I knew nothing about Imatest, I asked, I got the answer. And when I don't know something, I ask, unlike parading around like a complete effing idiot like you and your fellow entertainers.

Case in point:

http://forums.dpreview.com/forums/read.asp?forum=1018&message=39658713

Yes, that's basically correct, although Imatest has an additional problem (at least in the versions I have seen) where it does not properly compensate for the the clipping of the negative going noise excursions as the grey patches approach black, which I cover in another post. This, as much as anything, is likely why Imatest measures higher DR than what DxOMark does.
the most suitable counterpoint was posted by me first up
http://forums.dpreview.com/forums/read.asp?forum=1022&message=39640258
http://forums.dpreview.com/forums/read.asp?forum=1022&message=30228853

but I think DXO uses what I'd call an "engineering" based approach where DR is counted up to the point where you can't distinguish any signal at all. In practice, that overstates useful or practical DR significantly. A better approach is to establish some noise threshold as the cutoff point. The problem with that, is that some images will make noise more or less noticable and some viewers are more or less tolerant of noise. So you really need a range of thresholds. I like that Imatest delivers its results in that manner. There's a very good chance that "one number" DR numbers aren't saying what the reader thinks. Any time you see such single numbers, make sure you understand what the number means before placing too much importance on it

which pretty well laid it all out from the beginning
so you were saying ?
i knew enough to ask the question
But I knew enough to get the answer. Now, do you know enough to get understand the answer?

http://forums.dpreview.com/forums/read.asp?forum=1018&message=39658460

Well? Do you?
like I said, Jay covered that from the beginning
the 'fool' here didnt even think to ask it
Because I did not know that Imatest gave different results than DxOMark.
and somehow you think that puts you in front
Yes -- in fact it does.
And yet, I was right all along, whereas you were just fishing for some way to discredit DxOMark, and show the fool once again.
i think DxO is roundly criticised for its 'individual' even cavalier approach. More importantly is how DxO is used to bash, you would know more about how that works than I
It's one thing to be ignorant -- I was ignorant about Imatest, and am getting an education in the link above. It's quite another to parade your ignorance as a badge of honor, but, well, that's what makes The Entertainers' posts so entertaining, I suppose.
Yeah -- that.
--
Riley

any similarity to persons living or dead is coincidental and unintended
 
You are assuming that read noise scales with pixel area. AFAIK, for a given manufacturing process this is not the case. If you are referring to different manufacturing processes then we are comparing apples and oranges.
What I'm interested in is mathematical proof of your statement above (academic interest only).
".. I can tell you, for a fact , that more pixels for a given sensor size and efficiency results in more IQ all the way around."
Sorry, didn't notice your post until just now. OK, let's consider two sensors of the sames size that are equally efficient (same QE, same read noise / area, same saturation / area), where Sensor A has four times the number of pixels as Sensor B.

Without loss of generality, assume QE = 1 and the read noise for a pixel of Sensor A is 4 electrons. Let's also assume that 9 electrons fall on each pixel of Sensor A, and thus 9 x 4 = 36 electrons fall on each pixel of Sensor B (just to make the computations more simple).

The photon noise for one pixel on Sensor A is sqrt 9 = 3 electrons. This makes the total noise sqrt (3² + 4²) = 5 electrons / pixel. The total noise for four pixels on Sensor A is sqrt (5² + 5² + 5² + 5²) = 10 electrons, giving us an NSR of 10 / 36 = 28%.

Now let's consider one pixel of Sensor B. The photon noise will be sqrt 36 = 6 electrons, and the read noise is 4 x 4 = 16 electrons. This gives us a total noise of sqrt (6² + 16²) = sqrt 292 = 17 electrons, resulting in an NSR of 17 / 36 = 47%.

So, more pixels on an equally efficient sensor result in less noise / area. It is interesting to note that if the read noise were to scale with the linear dimension of the pixel, rather than the area, then the noise would be the same.
I guess we've hashed this to death. :)
Pretty much! :D
 
You are assuming that read noise scales with pixel area.
I am not "assuming" -- I am defining "equally efficient sensors" as two sensors with the same QE, same read noise / area, and same saturation limit / area.
AFAIK, for a given manufacturing process this is not the case. If you are referring to different manufacturing processes then we are comparing apples and oranges.
It's funny because I just addressed all that in my post above:

http://forums.dpreview.com/forums/read.asp?forum=1022&message=39661473

The reality is far more complex than simple scaling. All I'm saying is that "equally efficient sensors" means the same QE and that per-pixel read noise and saturation limit scale with pixel area throughout the ISO range.

That said, some sensors are pretty close -- e.g. the 5D2 and E5. I mean, they're so close, one might even think that Olympus copied the 5D2 sensor and just scaled it down.
 
You are assuming that read noise scales with pixel area.
I am not "assuming" -- I am defining "equally efficient sensors" as two sensors with the same QE, same read noise / area, and same saturation limit / area.
Yes, you are defining a situation designed to give you the answer you want. But if you really want to make a comparison between large and small pixels you should start with a level playing field. Read noise, for a given manufacturing process, simply does not scale with pixel area. Therefore, your definition is comparing apple with oranges.
AFAIK, for a given manufacturing process this is not the case. If you are referring to different manufacturing processes then we are comparing apples and oranges.
It's funny because I just addressed all that in my post above:

http://forums.dpreview.com/forums/read.asp?forum=1022&message=39661473

The reality is far more complex than simple scaling. All I'm saying is that "equally efficient sensors" means the same QE and that per-pixel read noise and saturation limit scale with pixel area throughout the ISO range.

That said, some sensors are pretty close -- e.g. the 5D2 and E5. I mean, they're so close, one might even think that Olympus copied the 5D2 sensor and just scaled it down.
Sorry, I hadn't seen the above post. But it doesn't really answer my question.
 
so you were saying ?
Something like this:

http://forums.dpreview.com/forums/read.asp?forum=1018&message=39659633

Why get all bothered about this: the engineering DR as provided by DxOMark does serve as a very good basis for comparing this parameter of different camera models to each other. If needs the maximum in ability to underexpose raw images and recover in post processing or to compress the overall DR of a scene into a more limited TR for viewing, a camera that scores higher in DxOMark DR will always be better, no matter what manipulations one does. If your quality standard finds that a Signal to Noise Ratio (SNR) of one isn't enough to provide image quality to your standards, you are free to estimate your preferred ratings by reducing the number of stops of DxOMark DR as I outlined in a previous post above. A high DR score has no other purpose than these uses. Various TR scores don't really have any meaning for a raw shooter as one manipulates the raw data in post processing to obtain that TR score. Why fret it?
 

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