March 2012 - colorsync-users

Aperture 3 import color issues
by davidbmoore 29 Mar '12

29 Mar '12

Sorry if this has been covered……please point me to the correct posts. Aperture imports a tif Adobe98 file and hoses the colors. Example: a fill of (72, 182, 70) in an A98 file imports into AP3 with a major color change. If I take that same file and convert it in PS to sRGB then import that to AP3 the colors basically are the same as the non imported A98 file in PS. Some think things changed when AP3 came out and others think it is a Lion issue. I think Colorsync is the color engine for Aperture… How can color issues happen in an Apple product? Thanks for all helpful suggestions. DAvid

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Comparing color performance on Displays
by Hugo Caceres 29 Mar '12

29 Mar '12

Hello, I was curious about how one can find an optimal standard set of colors in CIELAB to compare the performance of different liquid crystal displays to. For example, if I wanted to know how far the color reproduction of my display is to that of a defined set of colors, then I would measure the CIELAB of the 24 Gretagmacbeth colorchecker on the display and compare it to the known CIELAB values in the card. This will give me a Delta-E I can use to determine the difference. The problem is the CIELAB values of the display have very high luminance as opposed to the CIELAB values on the colorchecker. Does anyone know a why one can compare the colors of an LCD to a well-defined base that is reflective? Regards, Tod Canete

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cannot get canon eos utility working
by Millers' Photography L.L.C. 27 Mar '12

27 Mar '12

Might not be a proper topic. however I need guidance. Normally called 'help' Equipment is MacBook Pro 4.1 with 17 inch display. OS 10.6 8 Canon EOS utility and 1Ds MK II see each other. However I cannot make EOS utility work. I cannot get 'Camera settings/Remote shooting' active. Never had this issue before. Thank you all in advance. Thank you for your prompt consideration and response. Sincerely, David B. Miller, Pharm. D. member Millers' Photography L.L.C. 3809 Alabama Street Bellingham, WA 98226 360 739 2826 digitalimaging(a)dnmillerphoto.com

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Re: Re: CMYK for photographers
by Paul Sherfield 27 Mar '12

27 Mar '12

Just a quick comment on this re the statement 'They send untagged PDF/X-1a documents to the RIP'. By default a PDF X 1a document has to have a 'Output intent'. This can be a profile or refer to a printing condition. Many proofing RIPS can be set to honour this 'Output intent' and proof to the printing condition. A PDF X-1a cannot how profiles attached to images. It is best when using PDF X1a for the CMYK images to have been converted to the CMYK of the 'Output intent' to avoid a change in colour appearance when proofing. Regards Paul Sherfield The Missing Horse Consultancy Ltd Telephone : + 44 1442 207626 Mobile: + 44 7899 906385 http://www.missinghorsecons.co.uk http://twitter.com/#!/missinghorse Apple Solutions Expert - Print & Publishing Member - UK TC130 Technical Advisory Group (ISO 12647 Printing Standards) UK Expert: ISO TC130/Working Group 13 on certification of printing standards Chair BPIF UK ISO 12647 Certification Steering Group Member - BPIF Technical Standards Committee Lean and green? To save money and become a greener printer, see http://www.greenprinter.co.uk http://www.keeconsultants.com Reduce your carbon footprint http://www.1010uk.org This email and any attachments may be confidential and are intended solely for the use of addressee. If you are not the intended recipient of this message, any disclosure, copying or other distribution is strictly prohibited and may be unlawful. If you have received this message in error, please notify the sender and delete all copies from your system. Email may be susceptible to data corruption, interception and unauthorised amendment. We do not accept liability for any such corruption, interception or amendment or the consequences thereof. We do not accept liability for any action or inaction by the recipient as a result of advice or information contained within this email.

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CMYK for photographers
by jeff＠bigtopstudio.com 26 Mar '12

26 Mar '12

As a commercial photographer and color enthusiast I felt I had a good grasp of RGB to CMYK workflows, that is, deliver RGB when possible so images can be repurposed later. Sometimes a client will demand CMYK files without offering any description of the output conditions. In this case it seemed consensus was to convert to SWOPv2 which is easy as it's the Photoshop default and most photographers simply use image>mode>convert to CMYK. Many photographers who offer in house conversions and proofs are also using SWOPv2 for a multitude of reasons. Now I come to find out that things have changed quite a bit in the last few years and press data beyond TR001 and new or refined specifications like G7, GRACoL 7, SWOP 3 and 5 are all well known and accepted. And Lab data too! I've seen posted here that converting to SWOP2006grade3 is a much better choice for unspecified CMYK web than SWOPv2 as it has better data from a better run on a whiter paper that is more common. I've also read and seen in colorthink that SWOPv2 has a similar white point as the SWOP2006grade5 which is more yellow. So should photographers who choose to convert to CMYK themselves who had been using SWOPv2 change to the newer SWOP2006 profiles? Does Adobe plan to change the default CMYK from SWOPv2 to a newer profile? Along the same lines, I'm helping a friend setup an Epson 7900 proofing edition with EFI XF 4.1. They send untagged PDF/X-1a documents to the RIP from indesign CS3. We plan to set up the Epson with GRACoL certification and the training videos suggest setting the "CMYK source" in EFI to CoatedGRACol2006.icc Does that mean the PDF/X-1a from indesign (and the included images) should also be in the CoatedGRACol2006 space before it is sent to the RIP untagged? And a final question, should photographers convert to CoatedGRACoL2006 instead of SWOPgrade3 for unspecified CMYK conversion or just stick with SWOPv2 and pretend none of this happened? TIA

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Re: CMYK for photographers
by jeff＠bigtopstudio.com 26 Mar '12

26 Mar '12

Thank you Andrew, Rick and Roger for your insight on this. Roger, when you say 'ISO coated may be a better choice', what does that mean? Is 'ISO coated' any profile that meets 12647 standards like GRACoL 2006 or SWOP 2006 ? Also, what did you think about my question below about converting to GRACoL 2006 before sending to the Epson? Thanks again. "Along the same lines, I'm helping a friend setup an Epson 7900 proofing edition with EFI XF 4.1. They send untagged PDF/X-1a documents to the RIP from indesign CS3. We plan to set up the Epson with GRACoL certification and the training videos suggest setting the "CMYK source" in EFI to CoatedGRACol2006.icc Does that mean the PDF/X-1a from indesign (and the included images) should also be in the CoatedGRACol2006 space before it is sent to the RIP untagged?" > > So, to conclude, I would personally tend not to use SWOPv2 as the default > because SWOPv2 represents an inherently yellow substrate and will render > all > colors with that tint of yellow that they don't originally have, most > likely. I would tend to think that ISO Coated might be a better choice, > but > again so is SWOP2006_C3. > > Best / Roger >

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i1Profiler workflow embedded inside ICC?
by Walker Blackwell 25 Mar '12

25 Mar '12

So a month ago I swear I rebuilt a profile directly from the original profile (I had saved CXF data inside the profile at build time). Now, all of a sudden i1Profiler doesn't include the patch-read data from the profile and I can only rebuild profiles from saved workflows. Am I completely tripping here? Anybody else see this issue? This might have been an all-nighter. I'm used to Profiler Platinum and the ability to rebuild profiles so I'm assuming this is possible in i1Profiler. Just seems to not be working for me. Best, Walker

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Re: EFI null
by Randy Zaucha 24 Mar '12

24 Mar '12

We are using version 4.5.3. The RGB driver does not seem fully developed. It has not given a much larger gamut than the CT version. Not sure if it is working right.Randy ZauchaManaged Color --- On Wed, 3/21/12, faro mojahedi <faromojahedi(a)yahoo.com> wrote: From: faro mojahedi <faromojahedi(a)yahoo.com> Subject: EFI null To: "zbet66(a)yahoo.com" <zbet66(a)yahoo.com> Date: Wednesday, March 21, 2012, 1:27 PM Hi Randy, I have EFI4.5 as well. RGB display prints never look as good as through Adobe/OS-Mac driver.How do you access EFI RGB driver?Thanks,Faro Hi All,Thanks for the replies.First off, I was not able to get to the edge of the new printer's gamut with just the EFI RGB driver. Then I tried creating a media setting as a simulation of Adobe RGB which is what the client files are mostly in. The results were still not as wide a gamut as printing through a postscript driver without a profile to an older dye ink printer. Then I set the simulation for a much larger gamut...Prophoto RGB. Add an Absolute rendering intent and the output gamut through the EFI Rip expanded past the gamut of a non-profiled printer. (except for cyans) Quite a surprise, but for packaging designers, the extra gamut is a real treat. Now they want a Gracol simulation for process colors, but also accurate Spot color simulation at the same time. Very demanding client, no? Randy Zaucha

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Re: Color Man. Text Book
by david wollmann 21 Mar '12

21 Mar '12

Hi, I would like to thank you all for your comments and suggestions. Some very useful info. Thank you, David Wollmann

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Subject: Re:Null Profile
by Randy Zaucha 21 Mar '12

21 Mar '12

Hi All,Thanks for the replies.First off, I was not able to get to the edge of the new printer's gamut with just the EFI RGB driver. Then I tried creating a media setting as a simulation of Adobe RGB which is what the client files are mostly in. The results were still not as wide a gamut as printing through a postscript driver without a profile to an older dye ink printer. Then I set the simulation for a much larger gamut...Prophoto RGB. Add an Absolute rendering intent and the output gamut through the EFI Rip expanded past the gamut of a non-profiled printer. (except for cyans) Quite a surprise, but for packaging designers, the extra gamut is a real treat. Now they want a Gracol simulation for process colors, but also accurate Spot color simulation at the same time. Very demanding client, no? Randy Zaucha

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