Re: camera profile & rendering intent
Re: camera profile & rendering intent
- Subject: Re: camera profile & rendering intent
- From: Jim Rich <email@hidden>
- Date: Sat, 05 Jan 2002 12:57:18 -0500
On 1/5/02 5:03 AM, "Charles Beasley" <email@hidden> wrote:
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After assigning camera profile to an image file, upon converting to
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working RGB (Adobe 98) should rendering intent be Perceptual or Relative
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Colorimetric. What about BPC & Dither options? I have searched archive
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and not found this addressed directly. Thanks in advance.
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Charles,
The rendering intents are user defined controls and their use is based on
each images tones and colors that are in or out of the printers color gamut.
So if you have an image with colors that are out of gamut and you want to
try and maintain the images color and tones the best way possible, use
Perceptual. This option becomes a trade off and is not as accurate as the
Rel Col intent. If on the other hand you have an image with colors and tones
within the gamut of your printer, then the most accurate option is Rel Col.
As for the Black Point Compensation. I find it depends on who you talk to.
Some experts will say use BPC in Photoshop 6 and some will say turn it off.
It is my understanding that BPC was created to take care of a technical
problem in PS 5.xx and the way it handled defining the black point of an
image based on the black point of a profile (that might not be well defined
so this option compensates for it).
I find that BPC works ok when it is on in PS 6, but it depends on the
profiles you use. If you find it causes a problem turn it off.
As for dither, this a good option to keep on. It allows you to have better
color precision when PS 6 performs it color calculations. PS 6 uses 16 bit
accuracy even if the original file is only 8 bits. The Dither option enables
the final image to have smooth transitions between tones.
My .02.
Jim Rich