Using "saturation" rendering intent for photos

B
Posted By
bhilton665
Oct 23, 2004
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978
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Anyone using "saturation" rendering for photos?

Reason I’m asking is that I’m testing various coated fine art watercolor papers for my Epson 4000 and one of the paper manufacturers supplies ICC files with instructions on which settings to use. They said to use either Perceptual or Saturation for the rendering intent. I’ve always heard that Perceptual and RelCol were the best choices for photos and Saturation was best used for something like business graphics pie charts or similar. I emailed their support team, saying I thought they had an error in their PDF but they disagree. Here is a quote from the reply:

<quote>The intents are not as black and white as they might appear. The software which we use to create the profiles, Colorvision’s ProfilerPro creates profiles based on the saturation intent. It is a common myth that profile intents are so cut and dry. </quote>

I re-read Blatner’s "Real World Color Management" on the rendering intents, complete with LAB plots showing how the different intents handle colors, and also the CS help files, which had this to say about Saturation … "Tries to produce vivid colors in an image at the expense of color accuracy. This rendering intent is suitable for business graphics like graphs or charts, where bright saturated colors are more important than the exact relationship between colors (such as in a photographic image)."

But it’s a big world and there are many ways to do things … so I thought I’d ask if anyone else has experience using this rendering intent for photos, and if you thought it worked well. Even with Perceptual I don’t seem to get as good a match with the profile as I do with others, FWIW.

Bill

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M
mushy
Oct 23, 2004
My limited experience with profile rendering intents is with the Epson profiles on a 1280. My conclusion is that the profile builders do not implement these intents to the letter, or in a "cut and dry" way. Note that when describing rendering intents, Blatner carefully used the words "Tries to produce …" in your book, and in my older copy of Real World PS, he used "…attempts to map…". To me, that means the different rendering intents are specified as general guidelines for the profile builders. It therefore would not surprise me if the builders should push the envelops or even ignore the guidelines, either because of incompetence or for good reasons.

For example, relative colorimetric rendering is supposed to keep all the in gamut colors exactly the same. But I found with the Epson 1280 profiles, this is simply not the case with some colors in some of my photos. Now I softproof (and test print) with different profiles and with different rendering intents and pick the one that "works". In most cases though, a media’s own profile with Perceptual or RelCol intents do work best for my photos.

Mike Russell has a tool to show how a profile is mapping the colors. Never found the time to try it (afraid to find out?), nor do I know if it will support rendering intents.

Good luck.

Bill Hilton wrote:
Anyone using "saturation" rendering for photos?
Reason I’m asking is that I’m testing various coated fine art watercolor papers for my Epson 4000 and one of the paper manufacturers supplies ICC files with instructions on which settings to use. They said to use either Perceptual or Saturation for the rendering intent. I’ve always heard that Perceptual and RelCol were the best choices for photos and Saturation was best used for something like business graphics pie charts or similar. I emailed their support team, saying I thought they had an error in their PDF but they disagree. Here is a quote from the reply:

<quote>The intents are not as black and white as they might appear. The software which we use to create the profiles, Colorvision’s ProfilerPro creates profiles based on the saturation intent. It is a common myth that profile intents are so cut and dry. </quote>

I re-read Blatner’s "Real World Color Management" on the rendering intents, complete with LAB plots showing how the different intents handle colors, and also the CS help files, which had this to say about Saturation … "Tries to produce vivid colors in an image at the expense of color accuracy. This rendering intent is suitable for business graphics like graphs or charts, where bright saturated colors are more important than the exact relationship between colors (such as in a photographic image)."

But it’s a big world and there are many ways to do things … so I thought I’d ask if anyone else has experience using this rendering intent for photos, and if you thought it worked well. Even with Perceptual I don’t seem to get as good a match with the profile as I do with others, FWIW.
Bill
CC
Chris Cox
Oct 25, 2004
Sounds like they’ve only tested profiling tools that DON’T create a saturation intent (and map it to be the same as perceptual).

Chris

In article , Bill Hilton
wrote:

Anyone using "saturation" rendering for photos?
Reason I’m asking is that I’m testing various coated fine art watercolor papers
for my Epson 4000 and one of the paper manufacturers supplies ICC files with instructions on which settings to use. They said to use either Perceptual or Saturation for the rendering intent. I’ve always heard that Perceptual and RelCol were the best choices for photos and Saturation was best used for something like business graphics pie charts or similar. I emailed their support team, saying I thought they had an error in their PDF but they disagree. Here is a quote from the reply:

<quote>The intents are not as black and white as they might appear. The software which we use to create the profiles, Colorvision’s ProfilerPro creates
profiles based on the saturation intent. It is a common myth that profile intents are so cut and dry. </quote>

I re-read Blatner’s "Real World Color Management" on the rendering intents, complete with LAB plots showing how the different intents handle colors, and also the CS help files, which had this to say about Saturation … "Tries to produce vivid colors in an image at the expense of color accuracy. This rendering intent is suitable for business graphics like graphs or charts, where
bright saturated colors are more important than the exact relationship between colors (such as in a photographic image)."

But it’s a big world and there are many ways to do things … so I thought I’d ask if anyone else has experience using this rendering intent for photos, and if you thought it worked well. Even with Perceptual I don’t seem to get as good a match with the profile as I do with others, FWIW.
Bill
M
mushy
Oct 25, 2004
When Soft Proofing in PS CS with an Epson media profile, is the gamut warning accurate? I have encounter situations that there are no warnings with gamut warning on, but some colors will print very differently.

Chris Cox wrote:
Sounds like they’ve only tested profiling tools that DON’T create a saturation intent (and map it to be the same as perceptual).
Chris

In article , Bill Hilton
wrote:

Anyone using "saturation" rendering for photos?
Reason I’m asking is that I’m testing various coated fine art watercolor papers
for my Epson 4000 and one of the paper manufacturers supplies ICC files with instructions on which settings to use. They said to use either Perceptual or Saturation for the rendering intent. I’ve always heard that Perceptual and RelCol were the best choices for photos and Saturation was best used for something like business graphics pie charts or similar. I emailed their support team, saying I thought they had an error in their PDF but they disagree. Here is a quote from the reply:

<quote>The intents are not as black and white as they might appear. The software which we use to create the profiles, Colorvision’s ProfilerPro creates
profiles based on the saturation intent. It is a common myth that profile intents are so cut and dry. </quote>

I re-read Blatner’s "Real World Color Management" on the rendering intents, complete with LAB plots showing how the different intents handle colors, and also the CS help files, which had this to say about Saturation … "Tries to produce vivid colors in an image at the expense of color accuracy. This rendering intent is suitable for business graphics like graphs or charts, where
bright saturated colors are more important than the exact relationship between colors (such as in a photographic image)."

But it’s a big world and there are many ways to do things … so I thought I’d ask if anyone else has experience using this rendering intent for photos, and if you thought it worked well. Even with Perceptual I don’t seem to get as good a match with the profile as I do with others, FWIW.
Bill
CC
Chris Cox
Nov 1, 2004
In article wrote:

When Soft Proofing in PS CS with an Epson media profile, is the gamut warning accurate? I have encounter situations that there are no warnings with gamut warning on, but some colors will print very differently.

So far their profiles have been reasonably accurate about the gamut.

Chris

Chris Cox wrote:
Sounds like they’ve only tested profiling tools that DON’T create a saturation intent (and map it to be the same as perceptual).
Chris

In article , Bill Hilton
wrote:

Anyone using "saturation" rendering for photos?
Reason I’m asking is that I’m testing various coated fine art watercolor papers
for my Epson 4000 and one of the paper manufacturers supplies ICC files with
instructions on which settings to use. They said to use either Perceptual or
Saturation for the rendering intent. I’ve always heard that Perceptual and
RelCol were the best choices for photos and Saturation was best used for something like business graphics pie charts or similar. I emailed their support team, saying I thought they had an error in their PDF but they disagree. Here is a quote from the reply:

<quote>The intents are not as black and white as they might appear. The software which we use to create the profiles, Colorvision’s ProfilerPro creates
profiles based on the saturation intent. It is a common myth that profile intents are so cut and dry. </quote>

I re-read Blatner’s "Real World Color Management" on the rendering intents,
complete with LAB plots showing how the different intents handle colors, and
also the CS help files, which had this to say about Saturation … "Tries to
produce vivid colors in an image at the expense of color accuracy. This rendering intent is suitable for business graphics like graphs or charts, where
bright saturated colors are more important than the exact relationship between
colors (such as in a photographic image)."

But it’s a big world and there are many ways to do things … so I thought I’d
ask if anyone else has experience using this rendering intent for photos, and
if you thought it worked well. Even with Perceptual I don’t seem to get as good a match with the profile as I do with others, FWIW.
Bill

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