August 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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Monitor Suggestion
by lists＠carlolavatori 24 Aug '20

24 Aug '20

Hallo group, is time I buy a new monitor and with a budget of 1500 € more or less I was thinking about the Eizo CG 247X Wonder if anybody has any opinions on it or if anybody knows of a discussion group more dedicated to monitors evaluation…. thanks! Carlo

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Monitor Suggestion
by Axel Robert 24 Aug '20

24 Aug '20

Ciao Carlo, The CG247x is a real piece of art in 4K with a built-in sensor. But, in my humble opinion, for a few more hundred euros, you could also check the CG279X. I use the latter for two years now after having passed a long time with the CG247x. Space is not a luxury to work; it's a real comfort: 2560 x 1440 - 108 ppp versus 1920 x 1200 - 96 ppp. Both are IPS with LED type backlighting. It's very convenient when you have to spend a lot of time in front a display. PS: I have no contact nor deal, and I'm not affiliate with EIZO. It's just 20 years spent to work with monitors... Best. Axel On 21/08/2020 21:00, "colorsync-users-request(a)lists.apple.com" <colorsync-users-request(a)lists.apple.com> wrote: Send colorsync-users mailing list submissions to colorsync-users(a)lists.apple.com To subscribe or unsubscribe via the World Wide Web, visit https://lists.apple.com/mailman/listinfo/colorsync-users or, via email, send a message with subject or body 'help' to colorsync-users-request(a)lists.apple.com You can reach the person managing the list at colorsync-users-owner(a)lists.apple.com When replying, please edit your Subject line so it is more specific than "Re: Contents of colorsync-users digest..." Today's Topics: 1. Monitor Suggestion (lists@carlolavatori) ---------------------------------------------------------------------- Message: 1 Date: Fri, 21 Aug 2020 09:27:48 +0200 From: "lists@carlolavatori" <lists(a)carlolavatori.com> To: ColorSync <colorsync-users(a)lists.apple.com> Subject: Monitor Suggestion Message-ID: <12CAA48E-8B14-4677-A887-9BE05C19CB2E(a)carlolavatori.com> Content-Type: text/plain; charset=utf-8 Hallo group, is time I buy a new monitor and with a budget of 1500 ? more or less I was thinking about the Eizo CG 247X Wonder if anybody has any opinions on it or if anybody knows of a discussion group more dedicated to monitors evaluation?. thanks! Carlo ------------------------------ 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 17, Issue 76 ***********************************************

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Re: Monitor suggestion
by Nagy Péter 22 Aug '20

22 Aug '20

Hi Carlo, Your other option is the NEC PA-271Q. It’s cheaper and larger, but you have to use your own colorimeter instead of the built in one which the Eizo has. I think the overall image quality is on par with Eizo. Kind regards, Péter Colorcom > 2020. aug. 21. dátummal, 21:00 időpontban colorsync-users-request(a)lists.apple.com írta: > > Send colorsync-users mailing list submissions to > colorsync-users(a)lists.apple.com > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.apple.com/mailman/listinfo/colorsync-users > or, via email, send a message with subject or body 'help' to > colorsync-users-request(a)lists.apple.com > > You can reach the person managing the list at > colorsync-users-owner(a)lists.apple.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of colorsync-users digest..." > > > Today's Topics: > > 1. Monitor Suggestion (lists@carlolavatori) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 21 Aug 2020 09:27:48 +0200 > From: "lists@carlolavatori" <lists(a)carlolavatori.com> > To: ColorSync <colorsync-users(a)lists.apple.com> > Subject: Monitor Suggestion > Message-ID: <12CAA48E-8B14-4677-A887-9BE05C19CB2E(a)carlolavatori.com> > Content-Type: text/plain; charset=utf-8 > > Hallo group, > is time I buy a new monitor and with a budget of 1500 ? more or less I was thinking about the Eizo CG 247X > Wonder if anybody has any opinions on it or if anybody knows of a discussion group more dedicated to monitors evaluation?. > thanks! > > Carlo > > ------------------------------ > > 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 17, Issue 76 > ***********************************************

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