Re: Linear-light RAW 12bit vs R'G'B' 8bit: how much better is it really?
Re: Linear-light RAW 12bit vs R'G'B' 8bit: how much better is it really?
- Subject: Re: Linear-light RAW 12bit vs R'G'B' 8bit: how much better is it really?
- From: Marco Ugolini <email@hidden>
- Date: Mon, 23 Jul 2007 15:24:00 -0700
- Thread-topic: Linear-light RAW 12bit vs R'G'B' 8bit: how much better is it really?
In a message dated 7/23/07 1:44 PM, Mark wrote:
> Thanks for the inputs so far, I'll read the white-paper as suggested!
>
>>> Given that 11 bits linear are equal in precision to 8 bit gamma
>>> corrected [...]
>
>> How do you reach that determination? What is the equation?
>
> I've taken it from Charles Poynton's "Digital Video and HDTV", page 15.
> Quote "Perceptual uniformity allows as few as 8 bits to be used for each
> R'G'B' component. Without perceptual uniformity, each component would need 11
> bits or more."
> I'm not that good at math, but perhaps there's proof for that later on the
> book. Right now I am just assuming it is correct.
I understand. Excellent. Thank you.
Marco Ugolini
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