July 2021 - colorsync-users

Workflow for ‘remote’ profiling a non-colormanaged printer as a ‘back-box’
by Miles, Peter 21 Jul '21

21 Jul '21

Hi color sync users. This is a question about my workflow for ‘remote’ profiling a non-colormanaged printer as a ‘back-box’. And if you can see any obvious mistakes in my workflow / thinking. One of our staff is using an external non-colormanaged print provider. And I'm wanting to help him prepare work for it. Test prints to this printer are in AdobeRGB1998 and prints come out over saturated. So I am attempting to profile the print process ‘remotely’ using i1 profiler. And to do the color conversion ourselves. I am familiar with profiling inkjet and laser printers where I work using i1Profiler, FieryXF and ColorBurstRIP. I thought it would be a fairly straight forward process, but I’m getting some unexpected results. I am not in a position to control this external printer in any way. I have already had TC918 RGB patches printed on this printer (patches assigned AdobeRGB1998) and I created a printer RGB ICC profile of this process. When I assign this printer profile to the original AdobeRGB1998 test image we printed I get a very good approximation of the over saturated test print we got. So far so good. So I Imagined I just needed to use Convert-to-Profile on our AdobeRGB1998 test image, to convert it into the printer color space that I built. Then to ensure it gets handled by the external printer in exactly the same way as before, I just assign it AdobeRGB1998 again. When I do that, the test image now appears less saturated than it was before. Great, that’s just what I would expect. With the boost of saturation of this print process it should return back to normal when printed. But what I did not expect was that the blackest pixels in the converted test image that started out as RGB 4,4,9 are now RGB 30,29,28 after conversion. That sounds crazy to me! I have not printed this converted test image yet. I don’t want to waste my money printing this converted file if I have got this wrong. But everything else looks like what I would expect. Anyone else familiar with profiling printers as a 'Black-box'?, is this kind of thing with the high black point normal? Thanks Peter Miles

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IS&T Honors & Awards Nominations - Submit by Oct. 1, 2021
by Roberta Morehouse 21 Jul '21

21 Jul '21

2022 IS&T Honors and Awards Nominations Deadline: October 1 Nominations for IS&T 2022 Honors and Awards are currently being accepted. All members of the imaging science community are invited to nominate colleagues for their technical achievements in imaging science and technology or work they have done on behalf of the Society for Imaging Science and Technology (IS&T). Award descriptions and eligibility requirements: https://bit.ly/IST_HonorsAwards 2021 Honors & Award Recipients Press Release: https://bit.ly/2021HonorsAwards_PR SUBMIT YOUR NOMINATION TODAY! *IS&T membership is not a requirement for many awards, nor must one be a member to nominate a colleague. Questions? dsmith(a)imaging.org<mailto:dsmith@imaging.org> Roberta Morehouse, CMP Communications and Marketing Manager Society for Imaging Science and Technology (IS&T) -imaging across applications- imaging.org <http://www.imaging.org/> IS&T is a non-profit organization dedicated to advancing science and technology in the field of imaging. Please consider donating<https://www.imaging.org/site/IST/About_Us/Donations/IST/About/Donations.asp…> today. Connect with us on LinkedIn<https://www.linkedin.com/company/society-for-imaging-science-and-technology…> and Twitter @ImagingOrg<https://twitter.com/ImagingOrg>

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Re: NEC branded DTP94 and new mac chip
by William Hollingworth 19 Jul '21

19 Jul '21

Are you sure you mean the DTP94? We have done the i1d2 and i1d3 as custom logo'd NEC products, but never the DTP94 (which is long since obsolete and unsupported on 64 bit apps). For M1 support of SpectraView we have a separate interim version that fudges the current issues on M1 macs (lack of display info available via the OS APIs when running on an M1) until Apple is able to finally fix them (nudge-nudge to anyone at Apple reading this). There will be a newer version posted in the next day or so to update support for the i1Pro2/3 on M1. Contact me directly for info using my work email. https://update.sharpnecdisplays.us/spectraview/NEC_SpectraView_README_MacOS… Regarding your question on the customized MDSVSENSOR3: The pricing may be cheaper if you buy bundled with the display, but you may be locked out from using it with other apps since X-Rite implements a vendor lock mechanism into the device and software. Will Hollingworth| Director - Software Development and Innovation Sharp NEC Display Solutions of America, Inc. whollingworth(a)sharpnec-displays.com On 7/19/2021 2:00 PM, Rhea Garen <rg27(a)cornell.edu> wrote: > > Anyone know if we can get this display colorimeter to work with spectraview and the new Mac chip? We've got an NEC Spectraview monitor that we're hooking up to a new Mac laptop and can't seem to get Spectraview to work. The new chip requires the latest version of Spectraview and we're not sure if it still supports the calibrator. > > Rhea Garen > Manager Imaging Labs > DCAPS Imaging and Scanning Labs > Cornell University Library > 107A Olin Library > Ithaca, NY 14853 > >

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NEC branded DTP94 and new mac chip
by Rhea Garen 19 Jul '21

19 Jul '21

Anyone know if we can get this display colorimeter to work with spectraview and the new Mac chip? We've got an NEC Spectraview monitor that we're hooking up to a new Mac laptop and can't seem to get Spectraview to work. The new chip requires the latest version of Spectraview and we're not sure if it still supports the calibrator. Rhea Garen Manager Imaging Labs DCAPS Imaging and Scanning Labs Cornell University Library 107A Olin Library Ithaca, NY 14853 Phone: (607) 255-5177 Email: rg27(a)cornell.edu<https://exchange.cornell.edu/owa/redir.aspx?C=6609ecd7fdb640cc8e8abe7195773…> http://dcaps.library.cornell.edu<https://exchange.cornell.edu/owa/redir.aspx?C=6609ecd7fdb640cc8e8abe7195773…>

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Re: Workflow for ‘remote’ profiling a non-colormanaged printer as a ‘back-box’
by Scott Martin 15 Jul '21

15 Jul '21

> On Jul 15, 2021, at 2:16 PM, Miles, Peter <P.Miles(a)massey.ac.nz> wrote: > Our staff member is not sure other than it’s a vinyl ‘banner’ printer. I am guessing some kind of grand format inkjet. He says the media for this printer is about 3 meters wide... Ah so it’s a UV Curable or Solvent printer. Excellent. Yes, so it’s managed as CMYK(+) through a RIP. This means that any attempt to profile it on your end would account to “double profiling” and could only hurt image quality. They have ink restrictions, a linearization, total ink limit settings and an ICC profile that are possibly less than optimal. UV is easy to calibrate while Solvent and Dyesub processes are particularly tricky to set so people often put up with surprisingly sub-optimal results. I created the ChromaMax calibration methodology so one can hit the nail on the head with these settings every time without guesswork. Aside from offering to send in someone to dial in and optimize their process, you’re stuck with the limits of their process and calibration. My recommendation is to take an evaluation image (mine or your favorite) and make several versions of it in (sRGB, AdobeRGB, ProPhotoRGB, SWOP CMYK, etc) with some text in the file indicating the version. Print them all and see which looks the best. This also helps understand how their RIP settings are handling color management, IE: if it is honoring the embedded profiles or not. If they all look horrific they could be used to start a calibration conversation. And of course you can repeat this test with multiple print vendors and make an informed decision about which one to choose. All the best Scott Martin www.on-sight.com Imaging Science for Art

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