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: Wed, 20 Apr 2005 08:57:52 -0700
At 8:41 AM -0400 4/20/05, Jim Rich wrote:
" The tools are available to edit 16 bit images. However if a business is
considering doing the 16 bit workflow for what ever reason, a few tests
need to be done to determine things like are there are hits on processing
speed, will image quality be worse or the same and will the workflow have
the right capabilities. Based on those test, it is necessary to determine
what makes sense."
Those tests I've done.
On my systems, with my tools and my editing practices, the speed hit
I take from doing everything in 16-bit is certainly more than offset
by the time and effort taken to identify and redo the problem images
if they're 1 in 10 as your client reported (1 in 10 pretty much
agrees with my experience).
If the problems only surface in 3 in 100, time-wise it's probably a
wash, but identifying and redoing the 3 in 100 requires human
decision-making and disrupts the workflow, while the 16-bit workflow
is a comparative no-brainer. (3 in 100 may not sound like much, but I
remember the dubious pleasures of working with OCR programs that
offered 97% accuracy....)
I agree that everyone needs to make their own call, preferably based
on empirical testing, and I agree that everyone's mileage will vary.
I would, however, steer clear of service bureaus who told me that I
needed to replace my scanner or camera because their workflow
couldn't handle my images correctly, or that I needed to go and
reshoot the winning touchdown at the SuperBowl because the shot was
1/2 stop under. Then again, said service bureaux would probably
prefer that I steered clear of them anyway!
FWIW, I and the majority of my clients deliver print-ready 8-bit
images. You don't need to know how we got those images, you just need
to print them.
--
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