February 2022 - colorsync-users

Discover What's Trending in Imaging for XR—Space is Limited!
by Roberta Morehouse 23 Feb '22

23 Feb '22

Imaging for XR Workshop 4 March 2022 https://bit.ly/Imaging4XR Explore topics and application areas related to augmented reality, virtual reality, and mixed reality through a series of conversations covering: * extended reality in image quality of cameras and displays * image and color processing * content creation * quality of user experience/comfort Save over 30% off registration fees by 28 February. Student rates as low as $25 • Group Discount • Supplemental Stereoscopic Imaging Course<http://ist.informz.net/z/cjUucD9taT04NjQyOTA2JnA9MSZ1PTkwOTE3MTcwMiZsaT03NT…> Space is limited—Register Today! https://bit.ly/Imaging4XR The workshop will be recorded and accessible on-demand until 31 July. TALKS/SPEAKERS The State of the VR Immersive Media Ecosystem Eric Cheng, immersive media lead, Reality Labs Virtual Production for Film and Virtual Reality Logan Lemmon, head of studio, Supernatural Surgical Telerobotics Ian McDowall, Fellow, Vision Systems, Intuitive Surgical Why you shouldn’t ask questions Jannicke Mikkelsen, Norwegian explorer, Guinness World Record holder, film director, and cinematographer Color Appearance in Augmented Reality Imaging Systems Michael J. Murdoch, associate professor, Rochester Institute of Technology Apple Object Capture Long Quan, senior research manager, Apple Object Capture, Apple Join us for a day of invited keynotes, a group panel discussion, and engaging conversations around technical topics and application areas related to imaging for XR. Roberta Morehouse, CMP Communications and Marketing Manager Society for Imaging Science and Technology (IS&T) —imaging across applications— imaging.org <http://www.imaging.org/> 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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crobat color management workflow
by Mike Strickler 19 Feb '22

19 Feb '22

Hi Russell, Printing from Acrobat—you like to live dangerously. Because the source profile is not selectable here I assume that this is the default space given in the global color settings (Preferences: Color Management: Working spaces). The Acrobat print dialog gives no choice of rendering intent, so it might be better to do the transform in the Convert Colors tool (Print Production). Then print the converted document using the print dialog with no color management active "(Same as source”). There may be other twists to this that someone else may be able to comment on. Good luck. Mike Strickler MSP Graphic Services > Message: 1 > Date: Fri, 18 Feb 2022 13:11:22 -0500 > From: Russell Proulx <rproulx(a)r2p2.com> > To: colorsync-users(a)lists.apple.com > Subject: Acrobat color management workflow > Message-ID: <c219cb1c-8c48-b23d-d569-6d197f84396b(a)r2p2.com> > Content-Type: text/plain; charset=UTF-8; format=flowed > > Could someone please confirm if the following settings are appropriate > when printing a photo using Acrobat and wish to have color management > done either by the printer (an Epson 7000) or by Acrobat? > > *CM Managed by Printer:* > > In Acrobat -> Color Management -> Color Handling = Printer Color Management > > In the Apple printer settings -> ColorSync ON (set to Automatic or > manually select profile from list) > > *CM Managed by Acrobat:* > > In Acrobat -> Color Management -> Color Handling = Acrobat Color Management > ??? The appropriate Color Profile is then selected via the pull-down list > > In the Apple printer settings -> Epson Color Controls is selected and on > the Print page the Color Mode is set to "OFF (No color management)" > > It's my understanding that when Acrobat Color Management is enabled then > turning ColorSync on as well will produce double profiling. Is this correct? > > Someone has suggested that using ColorSync -> Automatic will > automatically set Color Mode to "OFF (No color management)" if Acrobat > Color Management is used. I'm not sure if that is correct. > > Thanks to anyone who knows and has time to respond :-) > > R > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > colorsync-users mailing list > colorsync-users(a)lists.apple.com > https://lists.apple.com/mailman/listinfo/colorsync-users > > > ------------------------------ > > End of colorsync-users Digest, Vol 19, Issue 9 > **********************************************

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Acrobat color management workflow
by Russell Proulx 18 Feb '22

18 Feb '22

Could someone please confirm if the following settings are appropriate when printing a photo using Acrobat and wish to have color management done either by the printer (an Epson 7000) or by Acrobat? *CM Managed by Printer:* In Acrobat -> Color Management -> Color Handling = Printer Color Management In the Apple printer settings -> ColorSync ON (set to Automatic or manually select profile from list) *CM Managed by Acrobat:* In Acrobat -> Color Management -> Color Handling = Acrobat Color Management The appropriate Color Profile is then selected via the pull-down list In the Apple printer settings -> Epson Color Controls is selected and on the Print page the Color Mode is set to "OFF (No color management)" It's my understanding that when Acrobat Color Management is enabled then turning ColorSync on as well will produce double profiling. Is this correct? Someone has suggested that using ColorSync -> Automatic will automatically set Color Mode to "OFF (No color management)" if Acrobat Color Management is used. I'm not sure if that is correct. Thanks to anyone who knows and has time to respond :-) R

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Gray Gamma 2.2 space and Photoshop2022 (23.1.1)
by Peter Miles 15 Feb '22

15 Feb '22

Hi List members Adobe RGB (1998) is gamma 2.2. So I was surprised to see that Photoshop (2022 23.1.1) changed the RGB values of a step-wedge I made in Gray Gamma 2.2 space after I converted it into Adobe RGB space. For example, in Gray Gamma 2.2 space my wedge starts out with RGB values, 0,0,0 / 5,5,5 / 10,10,10 / 15,15,15 / 20,20,20…. and the AdobeRGB(1998) conversion goes 0,0,0 / 13,13,13 / 18,18,18 / 22,22,22 / 27,27,27… Hmm… I just tried the same thing in Photoshop2019 and the RGB numbers stay the same for the conversion from GG2.2 to adobeRGB(1998) and back again. There are some other weird things happing with Photoshop 2022 handling of Gray Gamma 2.2 space black point. If I use a levels layer and lift the black point output level, I have to lift it to 5 before an eye dropper on my image on full black patch, finally moves from 0 to 1. That’s not right. REQUEST Can someone else on the list check this out. And let me know if you are seeing the same behaviour? Maybe there is something broken with our particular install? I am going to stop using Photoshop 2022 with my GrayGamma 2.2 space images till I can get to the bottom of this. Regards Peter Miles

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Re: colorsync-users Digest, Vol 19, Issue 7
by MARK NELSON 14 Feb '22

14 Feb '22

Years ago I was hand building “Step Wedges” with all the tones from 0-255 in grayscale. I would go back to check my work and find that a tone that was supposed to be something like 11 had changed to 12. I contacted Bruce Fraser about this and he told me that “Photoshop is basically a COLOR program and the math is more accurate using RGB values than Grayscale values. So I switched to Adobe 1998 working color space and that solved the problem Best Wishes, Mark Nelson www.PrecisionDigitalNegatives.com <http://www.precisiondigitalnegatives.com/> www.MarkINelsonPhoto.com <http://www.markinelsonphoto.com/> https://rfotofolio.org/mark-nelson/ <https://rfotofolio.org/mark-nelson/> > On Feb 14, 2022, at 2:00 PM, colorsync-users-request(a)lists.apple.com wrote: > > Hi Scott. > <snip> > Gray again is yet another scale using 0-100%. And no, there is no 0-255 option/conversion. > > But my understanding is that Grayscale pixel values are encoded using 0-255. Not 0-100%. > If that's true, then surly no math would be required for photoshop to display the 0-255 values? > If anything, I imagine math is needed to convert the 0-255 grayscale pixel values to their equivalent ink% values? > > And why doesn't photoshop eyedropper display the actual values for grayscale file (i.e. 0-255) when "Actual Color" is selected for the eyedropper? > but instead, appears to display those values converted into 'ink % colospace' ? > > Or am I missing something again. > > Thanks again for your help! > Peter Miles

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Convert to printer profile workflow question
by Russell Proulx 09 Feb '22

09 Feb '22

Hello all. Sorry if this has already been asked and answered. I've not been here for quite a while. I'm trying to help someone working in a school environment where the macOS (Big Sur) on their aging computers, together with their Epson and Canon printers is facing problems when trying to print using the traditional way of letting LrC or PS manage the color, choosing the printer/paper profile in the print dialogue, and then turning OFF printer CM. For whatever reason this is not playing nice. I'm suggesting as a temporary workaround that they convert the image to the printer/paper profile in PS (using a copy of the original image) and then send it to the printer using "Printer manages color" while still turning OFF the printer color management. Is there any reason this workaround will not work? I just did a test today on two 5x7" color targets printed on the same 8.5x11" paper (top/bottom - sent through the printer twice) and they're close to being identical. I suspect that any difference is due to the combination of options I used (Perceptual, Relative Colorimetric, Absolute Colorimetric / Black Point Compensation, Dither). If I use the same options in the convert to profile as I would in PS's printer dialogue will/should the output result look the same? Thanks for any help :-) Russell

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Tools for managing MacOS user display settings
by Peter Miles 08 Feb '22

08 Feb '22

Hi Color Sync Users This is about display color management in multi-user educational Mac labs. This is not an easy task. We run three colour managed labs in our photography department at our university. Students will change the brightness of their displays. And move them out of their calibrated setting. And without intervention, all subsequent users of that computer will inherit their choice for the display brightness. And not only that, the default setting for a new user account is for the display is to automatically adjust brightness using the ambient light level. When you running a color managed at the ISO recommend brightness of 32 lux, that makes for a very a dim display. And new users of a machine will not by default inherit the custom ICC display profile we build. We manage all this nonsense with log in scripts. That touch and set user setting in the display panel in System Preferences. Tools that load a selected display profile. Scripts that reset the display brightness to the level recorded at the time the custom profile was built. Scripts that then watch the display brightness setting. There are no Apple tools to manage these sorts of things. So our Mac IT specialist uses modified tools from Git Hub projects to do this. Like Joey Korkames ddcctl project we use for managing Mac display panel and brightness settings. And Tim Sutton has made a tool for selecting the custom display profiles. Plus there are other custom tools our Mac specialist built himself. We would both prefer if there were proper Apple MDM tools / Apple support for managing this sort of user display setting related stuff. As the Mac OS matures it becomes ever more secure, as it should. But then these back-door style tools keep breaking with OS updates. And we have to test and often re-engineer the tools every OS upgrade. This year the tool that turns off the user setting to automatically adjust the display brightness stopped working. If we can’t get it working before the students get back, we won’t be able to colour manage their labs. That’s a big deal for us. REQUEST If anyone on Apples ColorSync team is reading this, can you please go in to bat on our behalf and ask that Apple create some proper MDM tools (or something of the sorts) for businesses like ours that need to manage their users display settings. And if other list member who manage colour managed labs in an educational environments want to chip in with their experience I’d love to hear that too. Thanks Peter Miles

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Re: Convert to printer profile workflow question
by Russell Proulx 08 Feb '22

08 Feb '22

It's been suggested by the IT folks that the print with profile problem using Big Sur is not present when printing from inDesign nor Acrobat. Would printing using a color managed workflow from Acrobat indeed be a workaround? Is there any reason a broken CM system would only affect PS and LrC and not other Adobe apps? (call me skeptical ...) R :-)

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Imaging 4 XR Workshop Announced ~ Space Limited!
by Roberta Morehouse 08 Feb '22

08 Feb '22

Imaging for XR Workshop (Online) Host: Society for Imaging Science and Technology (IS&T) Fri, Mar 4, 2022, 9:00 - 15:00 CA / 12:00 - 18:00 NY Event URL: https://bit.ly/Imaging4XR ABOUT Imaging for XR focuses on content creation by professional and end-users, imaging technologies and workflows for various applications, including VR documentaries, live entertainment, online meetings, or medical uses, and how to improve imaging to improve comfort. Discover the latest trends in imaging for AR/VR/MR (XR), discuss pain points, learn from power users, and identify opportunities for further research and collaboration! TOPICS -XR image quality (camera and display) -Image and color processing for XR -Content creation for XR -Quality of user experience, comfort TALKS/SPEAKERS -The State of the VR Immersive Media Ecosystem Eric Cheng, immersive media lead, Reality Labs -Virtual Production for Film and Virtual Reality Logan Lemmon, head of studio, Supernatural -Why you shouldn't ask questions Jannicke Mikkelsen, film director and cinematographer -Color Appearance in Augmented Reality Imaging Systems Michael J. Murdoch, associate professor, Rochester Institute of Technology -Apple Object Capture Long Quan, senior research manager, Apple Object Capture, Apple Join us for a day of invited keynotes, a group panel discussion, and engaging conversations around technical topics and application areas related to imaging for XR. 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 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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Photoshop and ICCv4 Profiles
by PPS Lists 07 Feb '22

07 Feb '22

Hello all, I’m sending this as more of a “me too” and to provide some findings and experiences that may be helpful to someone, somehow. Aparrantly there are issues with Photoshop, Big Sur and printing. My next thing to try is to update one of these Macs to Monterey and hope for the best. And if that leads to gooseeggs I will fall back on the high-hassle workflow of printing from an old Mac running Catalina I wish I could put to pasture. Here's the problem: I seem to have stumbled into an odd bug when printing from Photoshop to an Epson P5000. I am experiencing this bug on two different Intel CPU Macs, both running Big Sur. I have tried both Photoshop 2021 and Photoshop 2022, as well as Lightroom Classic. I have deleted Photoshop preferences galore, and I have deleted and reset print systems and print queues galore. I have uninstalled and reinstalled the Epson print drivers galore. The issue is this: When I select an ICCv4 profile in Photoshop's profiles list, the "Print Settings…" button stops working. If I try to print anyway, the print will come out blank. This is the case whether I created the profiles with my own i1Profiler, or with profiles I download from paper manufacturers. I have some profiles downloaded from Moab that are ICCv2 and created with basICColor and the bug is not present. I use profiles from other paper manufacturers that are ICCv4, and the bug comes back. I create profiles with my own i1Profiler and make them ICCv4, the bug appears. I create profiles with my own i1Profiler and make them ICCv2, and the bug disappears. If I go back to an old system running Catalina, the bug is entirely gone. I can print day in and day out with ICCv4 profiles on that old Mac. I have stripped the Profiles folders of all printer profiles that were put there by me and not by Apple or Adobe, and this makes no difference. If I add back a single ICCv4 profile and try to use it the bug appears. If I select an ICCv2 profile instead, the bug goes away.

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