Anybody else unhappy with Red River's R3000 profiles?

Started Mar 23, 2013 | Discussions thread
Petruska Veteran Member • Posts: 7,955
Re: Brian, you win!

jtoolman wrote:

Petruska wrote:

Hugowolf wrote:

Have your tried using a perceptual rendering intent instead of relative colorimetric? ICC profiles allow for six lookup tables (LUTs), two for each intent. There should be an input to connection space table, and a connection space to output device table for each intent supported, and even an inexpensive profile builder should support tables for at least perceptual and relative colorimetric.

Brian A

Yes, Perceptual intent produces the correct purple block. There is still something wrong with a lot of the R3000 RR profiles as that purple block soft-proofs blue with Relative and soft-proofs as purple with Perceptual. Other RR profiles, Ex: Paper Canvas, soft-proofs purple for both Relative and Perceptual. All my custom Red River paper profiles made with the Xrite I1PRO or Xrite Pulse system soft-proof as purple with both Relative and Perceptual.

Most users use Relative intent, I don't, I use Perceptual 99.9% of the time as I print mostly portraits and find the out of gamut remapped lighter colors of Perceptual more pleasing. This is why I have never noticed anything wrong with RR supplied profiles when I first got my R3000. My custom profiles eliminate all issues. Relative intent gives more saturated colors, especially with BP Comp. turned off. So I can see where some users may be upset with not being able to use it correctly with some prints. The Epson profiles also soft-proof the purple correctly with Relative or Perceptual. RR has a problem.

Bob P.

Bob, does it matter if one use a specific rendering intent used for printing the test patches during the production of the profile?

Will the user then be "Locked" to the specific Rendering Intent used during the production of that profile when one prints using that same profile?

Not sure of the answers, I would need to dig into that.

Now we are printing the test patches with no color management, thus that is without an ICC profile and intents. When we make custom ICC profiles we have the 4 comonly used intents available and they do what they are supposed to do with the colors.

Obviously this is a subject that we could dig too deeply into.  If one looks at all the R3000 RR profiles you will see some that work just fine soft-proofing that purple block with either the Relative or Perceptual, where other RR profiles have a problem with just the Relative intent.

I looked at the RR APL profiles for the R3000, R2880, and 3880 and all 3 soft-proof with blue for purple with Relative intent, and purple with Perceptual.  Looking at the Canon PRO9000 RR APL profile you get purple with both Relative and Perceptual.  I say it's a broken RR profile for a lot of RR papers and Epson printers when using Relative intent.

My custom profiles are fine with both intents on any paper/ink/printer.

Bob P.

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