Re: 16 bits = 15 bits in Photoshop?
Re: 16 bits = 15 bits in Photoshop?
- Subject: Re: 16 bits = 15 bits in Photoshop?
- From: bruce fraser <email@hidden>
- Date: Sun, 17 Apr 2005 15:00:55 -0700
At 12:39 PM -0400 4/17/05, email@hidden wrote:
Bruce Fraser writes:
So, I ask if the following is a fair summary of your position:
1) Bruce states that the argument has never been that identical edits applied
to 8-bit and 16-bit files would produce better results in the 16-bit version,
but he argues that it is possible that they might.
2) Bruce has not offered up any images that would demonstrate such a
superiority for 16-bit correction (as opposed to identical edits
applied to 8-bit),
but he suggests that such images might exist.
3) Bruce's comments on "night and day difference" and "totally obvious to
anyone who looks" are based on his experience and perceptions; however, he has
never personally tested a series of corrections done to a 16-bit
file on a live
image versus identical corrections done to an 8-bit one.
No, that's a when-did-you-stop-beating-your-wife characterization.
My position is very straightforward.
I proved to my own satisfaction many (>10) years ago that many of the
problems I encountered with 8-bit files-posterizaton, striped skies,
exaggerated saturation accompanying contrast moves, and unwanted hue
shifts-largely disappeared when I edited (and converted to output
space, which is a big edit) in 16-bit instead.
I seem to be far from alone in having noticed this phenomenon.
I quite sensibly decline to do all my work twice with the goal of
making half of it fail, and with the exception of beta-testing
procedures that need examples for bug reports, I don't make a habit
of saving the failures.
If someone wants to pay me my day rate to do so, I'm quite certain
that I can come up with real-world examples, but I decline to donate
my time to a foolish quest with whose premiss I'm in disagreement.
Anyone who sees no benefit to working in 16-bit space simply
shouldn't bother doing so. But they shouldn't come crying to me when
their images fall apart on output.
My personal opinion is that this is a manufactured controversy-I
decline to speculate on the motivation of those who have manufactured
it-and I'm utterly disinclined to waste my time arguing the point
when I have better things to do with it.
--
email@hidden
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