HDR photography has been most popular for 12 months now and Manufacturers, (Samsung is leading the way) trying to lure artists to purchase their products by labeling them with such numbers 50.000:1, 60.000:1, and the last recent sledgehammer tactics again from Samsung, OK, ready for this? Samsung XL2370 5000.000:1 Dynamic Contrast Ratio hit the shelves, priced with a comical $299.
This can fool the 'novice consumer'. The pro, however, knows that today’s standard or high-end displays are not capable of displaying the real high dynamic range. And not likely to be available at least for next 5-10 years.
Since our topic is not about HDRI but the fake-labeled contrast ratio displays the Manufacturers are trying to dupe the innocent consumer to purchase a product that can lead beginner to a complex path and, moreover, a irreparable damage to HDR technology itself that is new and yet not understood widely.
For those who are not yet familiar with HDR and what the numbers above represent, here is a brief touch:
This image processed in HDRI. A test in the new Samsung XL2370 was nothing but a little boost in tonal range
What is dynamic range? Dynamic range (DR) is the highest overall contrast found in an image: It’s often called, though this name is less defined, contrast ratio. For example, the numbers 500:1 refer to the difference between the lightest and the darkest color values. Black doesn’t count as a value. We cannot compare anything to black. Black is like zero.
To cut a long story short: Light spans an enormous range, and our eyes, on a bright, sunny day, can see 1million to 1. This means from 1million lightest value to darkest 1 value. Impressive ha? On the Conversion Scale, that is, dynamic range measured as Contrast Ratio and EV (exposure Value) Span, translates to: 1000.000:1 contrast ratio and 20-22 EV Span. That’s how the eye sees the outside world.
2 exposure value= contrast ratio…now, it’s getting complicated. Not really.
For example, if you have a dynamic range that spans 12 EVs, that is, 2x12 = 4,096 (that is also a 16-bit tiff exposure value…more on that later). So, that DR can be called a contrast ratio of roughly 4,000:1…And that is not a full range, but in order to display such an image on standard monitor we have to convert it to LDR of an 8-bit exposure…this is sad.
Back to our topic, Samsung’s 5000.000:1 contrast ratio… you guessed it! This is 5 times of what the eye sees. That means it displays 5x22 exposure value =110 EV Span…I’ve been just blinded, thank you very much, Samsung!
My question is: what can we do to stop this from hurting this newly flourishing Art and Artists who are thriving very hard to introduce and promote HDRI inasmuch accurate way possible?
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