June 2020 - colorsync-users

Re: Humans (and cameras and scanners) do not have a color gamut (?)
by Rich Wagner 19 Oct '20

19 Oct '20

I agree with Florian’s responses below regarding how we “know” what animals “see.” The parallel question is how we “know” what women with tetrachromatic vision “see.” There is a very good article from the BBC that describes this that might help. https://www.bbc.com/future/article/20140905-the-women-with-super-human-visi… Here’s a short excerpt from the excellent story: Proving that these people actually see the world differently has involved a two-decade journey, however. Although the relevant combination of genes does not seem to be especially rare – perhaps 12% of women might have four distinct cones – many of the people that Jordan tested just didn’t seem to show any differences in their perception. But by 2010, she had found a subject who perfectly acted the part of a tetrachromat. Jordan’s “acid test” involved coloured discs showing different mixtures of pigment, such as a green made of yellow and blue. The mixtures were too subtle for most people to notice: almost all people would see the same shade of olive green, but each combination should give out a subtly different spectrum of light that would be perceptible to someone with a fourth cone. Sure enough, Jordan’s subject was able to differentiate between the different mixtures each time <http://www.journalofvision.org/content/10/8/12.full>. “When you ask them to discriminate between the two mixtures, a tetrachromat can do it very quickly. They don’t hesitate,” says Jordan. Unfortunately, much of the research in color perception is highly complex and often difficult for the lay public to comprehend. Good science writers can translate that research into language the lay public can understand. Poor science writing leads to exaggerated claims and misinformation. That said, the title of this article is a bit over the top. I don’t think these women have “super human vision” any more than those who are colorblind have “sub human vision.” Both have visual perception that is significantly different from the average of our species. —Rich > OnMon, 13 Jan 2020 19:40:11 +0100, Florian Hoech <lists+colorsync-users(a)hoech.org <mailto:lists+colorsync-users@hoech.org>> wrote: > [snip] >> Not a single case can be made by anyone?s fisthand information about the post processing by the brains of these animals. Who can know what they see or apprehend? > > You can draw pretty useful conclusions (meaning they work well in > real-life, thus supporting the respective theories) from all the > scientific research that has been done. "Color" perception is not just > "nice to have". Trichromats (like humans) have an evolutionary edge over > (say) dichromats, e.g. when it comes to distinguish edible/nutritious > from inedible/less nutritious food like fruits etc. When you look at the > M and L cone responses of any trichromat, you can see that the responses > of the "sensors" (cones) largely overlap. Yet, we seem to perceive the > "end result", green and red, as very different colors (opposites even!). > >> Since humans communicate with each other about color we can build models and references and so on. But animals? Yet, experts are quick to supply examples of how things must appear to non-humans. > > I think you may be conflating the actual research with how it is > presented (usually not by the researchers themselves), broken down and > simplified in newspapers/magazines/articles, online and offline, meant > for consumption by the general public. > >> When we grant that all of these theories are onto something about the ways animals percieve color we account for their differences by describing them in terms of ?gamuts?. > > I like the term "dimensions". A Tetrachromat has an additional dimension > of "color". > >> Surprise: experts determine gamuts based on the sensor alone! They don?t even seem to be the slightest bit unhappy about it. > > ...where? And who? Dimensionality alone doesn't really tell us much > about gamuts. > > Florian. >

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CIC28 Call for Papers Closes 30 June | Submit Today!
by Roberta Morehouse 25 Jun '20

25 Jun '20

The IS&T Color and Imaging Conference (CIC28) presents a unique opportunity to engage with an international community of scientists, technologists, and engineers working in the areas of color science and systems, and their application to color imaging. CONFERENCE TOPICS Technical papers are invited in, but not limited to, the following: Color Perception | Capture, Display & Print | Materials Appearance & Color | Color in Illumination & Lighting | Color Theory Image Quality | Multispectral Imaging | Specific Color Applications (cultural heritage, cinema & video, 3D printing, AR/VR/MR + more) Contribute your research and developments at the frontier of color imaging & science by next Tuesday, 30 June! http://bit.ly/CIC28_CFP SUBMISSION DEADLINES * Conference Proceedings Paper: 30 June 2020 * Accepted Proceedings Manuscripts Due: 14 September 2020 CIC28 ONLINE Twenty-eighth Color and Imaging Conference 2-13 November 2020 http://bit.ly/CIC28_ Follow us on LinkedIn & Twitter for #CIC28 for updates Roberta Morehouse, CMP Communications and Marketing Manager Society for Imaging Science and Technology (IS&T) www.imaging.org<http://www.imaging.org/>

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InDesign autofilling or not Output Condition Identifier
by Jorge . 23 Jun '20

23 Jun '20

In Adobe InDesign 2020, when exporting to PDF/X-4, selecting certain ICC profiles in Output Intent Profile Name autofills the fields Output Condition Identifier and Registry Output section. As an example, selecting Adobe’s “Coated FOGRA27 (ISO 12647-2:2004)” autofills: • Output Condition Identifier: FOGRA27 • Registry Output: http://www.color.org Not so when selecting Adobe’s “Coated FOGRA39 (ISO 12647-2:2004)” or others not bundled with the software such as “ISO Coated v2 300% (ECI)”, downloaded from eci.org, or “ISOcoated_VIGC_39L_260_v2.icc”, downloaded from color.org. I would have expected selecting either of those three would autofill: • Output Condition Identifier: FOGRA39 • Registry Output: http://www.color.org but it does not. Are those two fields important data that a PDF/X-4 would be good to have and if so, how come InDesign is not able to autofill them when using those as Output Intent but is with others?

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Wanted! Color Research at the Frontier of Imaging Science
by Roberta Morehouse 04 Jun '20

04 Jun '20

Color and appearance are critical to the success of applications involved in augmented and other realities (AR/VR/MR), 3D printing, digital color printmaking, cultural heritage digitization, and so much more. Contribute your research and developments at the frontier of color imaging across applications to the Twenty-eighth Color and Imaging Conference (CIC28) as a short course or workshop! Learn more at http://bit.ly/CIC28_CFP REVISED SUBMISSION DEADLINES **Workshop & Short Course Proposals: 15 June 2020 **Conference Proceedings Paper: 30 June 2020 Accepted Proceedings Manuscripts Due: 14 September 2020 CIC28 ONLINE Twenty-eighth Color and Imaging Conference 2-13 November 2020 http://bit.ly/CIC28_ Follow us on LinkedIn & Twitter for #CIC28 for updates Roberta Morehouse, CMP Communications and Marketing Manager Society for Imaging Science and Technology (IS&T)

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