Re: Color Perception: How does coffee affect color perception?
Stephan, We're they looking through Rosé coloured glasses? Mark P.S. apologies to all but I couldn't resist On 23/07/2013, at 7:41 PM, Stefan Ohlsson <stefan@profiler.nu> wrote:
On a slightly more serious note. I did an experiment once with an audience of about 150 persons. I showed them a large image and then showed them 5 variations of that image. They had to pick out the one that was exactly the same as the image that I showed first. About half of the audience were able to spot the correct image.
Then I gave every second person in the audience a glass of red whine and did the test again after ten minutes. Those who didn't have a glass, they succeeded better this time. About 60 % were able to spot the correct image. But those who drank the wine, only about 45 % got it right this time.
Stefan
23 jul 2013 kl. 03:13 skrev Mark Stegman:
David,
I find colours start to generally fade after the sixth Jack Daniels. Of course, this tends to vary depending on whether I have stimulating company and the volume of the music not to mention the luminance if the disco lighting. Under these conditions the UV from so-called 'black lights' tends to intensify. By the end of the night I have usually experienced a VERY wide gamut of colours although some these tend to occur while my eyes are closed! Eventually, everything fades to black. ;-(
Mark
On 23/07/2013, at 5:15 AM, "Millers' Photography L.L.C." <digitalimaging@dnmillerphoto.com> wrote:
Might not be appropriate in this list…….however: Color perception. What drinks like coffee, or foods affect color perception? In what manner?
David B Miller, Pharm. D. member Millers' Photography L.L.C. dba Spinnaker Photo Imaging Center Bellingham, WA
360 739 2826
_______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/mark.stegman%40gmail...
This email sent to mark.stegman@gmail.com
_______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/stefan%40profiler.nu
This email sent to stefan@profiler.nu
Projektor Utbildning AB Telefonvägen 30 126 26 Hägersten www.profiler.nu
“You never know what is enough unless you know what is more than enough.”
― William Blake 1757 – 1827
Of course:-) To be exact, 15 cl of red whine, perhaps 12% alcohol Stefan 23 jul 2013 kl. 11:55 skrev Mark Stegman:
Stephan,
We're they looking through Rosé coloured glasses?
Mark
P.S. apologies to all but I couldn't resist
On 23/07/2013, at 7:41 PM, Stefan Ohlsson <stefan@profiler.nu> wrote:
On a slightly more serious note. I did an experiment once with an audience of about 150 persons. I showed them a large image and then showed them 5 variations of that image. They had to pick out the one that was exactly the same as the image that I showed first. About half of the audience were able to spot the correct image.
Then I gave every second person in the audience a glass of red whine and did the test again after ten minutes. Those who didn't have a glass, they succeeded better this time. About 60 % were able to spot the correct image. But those who drank the wine, only about 45 % got it right this time.
Stefan
23 jul 2013 kl. 03:13 skrev Mark Stegman:
David,
I find colours start to generally fade after the sixth Jack Daniels. Of course, this tends to vary depending on whether I have stimulating company and the volume of the music not to mention the luminance if the disco lighting. Under these conditions the UV from so-called 'black lights' tends to intensify. By the end of the night I have usually experienced a VERY wide gamut of colours although some these tend to occur while my eyes are closed! Eventually, everything fades to black. ;-(
Mark
On 23/07/2013, at 5:15 AM, "Millers' Photography L.L.C." <digitalimaging@dnmillerphoto.com> wrote:
Might not be appropriate in this list…….however: Color perception. What drinks like coffee, or foods affect color perception? In what manner?
David B Miller, Pharm. D. member Millers' Photography L.L.C. dba Spinnaker Photo Imaging Center Bellingham, WA
360 739 2826
_______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/mark.stegman%40gmail...
This email sent to mark.stegman@gmail.com
_______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/stefan%40profiler.nu
This email sent to stefan@profiler.nu
Projektor Utbildning AB Telefonvägen 30 126 26 Hägersten www.profiler.nu
“You never know what is enough unless you know what is more than enough.”
― William Blake 1757 – 1827
Projektor Utbildning AB Telefonvägen 30 126 26 Hägersten www.profiler.nu “You never know what is enough unless you know what is more than enough.” ― William Blake 1757 – 1827
Depends on if you drink the cup of coffee or throw to your eyes. Cold coffee is less effective. If you ask for any other substance I can tell you something more, based on other people's experience of course. 2013/7/23 Stefan Ohlsson <stefan@profiler.nu>
Of course:-)
To be exact, 15 cl of red whine, perhaps 12% alcohol
Stefan
23 jul 2013 kl. 11:55 skrev Mark Stegman:
Stephan,
We're they looking through Rosé coloured glasses?
Mark
P.S. apologies to all but I couldn't resist
On 23/07/2013, at 7:41 PM, Stefan Ohlsson <stefan@profiler.nu> wrote:
On a slightly more serious note. I did an experiment once with an audience of about 150 persons. I showed them a large image and then showed them 5 variations of that image. They had to pick out the one that was exactly the same as the image that I showed first. About half of the audience were able to spot the correct image.
Then I gave every second person in the audience a glass of red whine and did the test again after ten minutes. Those who didn't have a glass, they succeeded better this time. About 60 % were able to spot the correct image. But those who drank the wine, only about 45 % got it right this time.
Stefan
23 jul 2013 kl. 03:13 skrev Mark Stegman:
David,
I find colours start to generally fade after the sixth Jack Daniels. Of course, this tends to vary depending on whether I have stimulating company and the volume of the music not to mention the luminance if the disco lighting. Under these conditions the UV from so-called 'black lights' tends to intensify. By the end of the night I have usually experienced a VERY wide gamut of colours although some these tend to occur while my eyes are closed! Eventually, everything fades to black. ;-(
Mark
On 23/07/2013, at 5:15 AM, "Millers' Photography L.L.C." < digitalimaging@dnmillerphoto.com> wrote:
Might not be appropriate in this list.......however: Color perception. What drinks like coffee, or foods affect color perception? In what manner?
David B Miller, Pharm. D. member Millers' Photography L.L.C. dba Spinnaker Photo Imaging Center Bellingham, WA
360 739 2826
_______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription:
https://lists.apple.com/mailman/options/colorsync-users/mark.stegman%40gmail...
This email sent to mark.stegman@gmail.com
_______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription:
https://lists.apple.com/mailman/options/colorsync-users/stefan%40profiler.nu
This email sent to stefan@profiler.nu
Projektor Utbildning AB Telefonvägen 30 126 26 Hägersten www.profiler.nu
"You never know what is enough unless you know what is more than enough."
-- William Blake 1757 - 1827
Projektor Utbildning AB Telefonvägen 30 126 26 Hägersten www.profiler.nu
"You never know what is enough unless you know what is more than enough."
-- William Blake 1757 - 1827
_______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription:
https://lists.apple.com/mailman/options/colorsync-users/jbueno61%40gmail.com
This email sent to jbueno61@gmail.com
Ah!. Interesting. What other substances? David B Miller, Pharm. D. member, Millers' Photography L.L.C. dba Spinnaker Photo Imaging Center 3809 Alabama Street Bellingham, WA 98226-4585 360 739 2826 spinnakerphotoimagingcenter@dnmillerphoto.com On Jul 23, 2013, at 11:28 AM, José Ángel Bueno García wrote:
Depends on if you drink the cup of coffee or throw to your eyes. Cold coffee is less effective. If you ask for any other substance I can tell you something more, based on other people's experience of course.
I prefer not to make mention. May be an act of vindication (apología in Castillian if translator mistakes), but you can find some in The Beatles experience: "Lucy in the Sky with Diamonds". 2013/7/23 Spinnaker Photo Imaging Center < spinnakerphotoimagingcenter@dnmillerphoto.com>
Ah!. Interesting. What other substances? David B Miller, Pharm. D. member, Millers' Photography L.L.C. dba Spinnaker Photo Imaging Center 3809 Alabama Street Bellingham, WA 98226-4585 360 739 2826 spinnakerphotoimagingcenter@dnmillerphoto.com
On Jul 23, 2013, at 11:28 AM, José Ángel Bueno García wrote:
Depends on if you drink the cup of coffee or throw to your eyes. Cold coffee is less effective. If you ask for any other substance I can tell you something more, based on other people's experience of course.
huge doses of tobacco are said to cause temporary color blindness. Anyone want to experiment and report back?
Age affects color perception. By midlife, your color perception has started changing. Bob frost -------------------------------------------------- From: "Mike Russell" <groups@curvemeister.com> Sent: Saturday, July 27, 2013 12:33 AM To: <colorsync-users@lists.apple.com> Subject: Re: Color Perception: How does coffee affect color perception?
huge doses of tobacco are said to cause temporary color blindness. Anyone want to experiment and report back? _______________________________________________ Do not post admin requests to the list. They will be ignored. Colorsync-users mailing list (Colorsync-users@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/colorsync-users/bobfrost%40btopenwor...
This email sent to bobfrost@btopenworld.com
Bob, This is an interesting suggestion. Would you have any links, by any chance? Best / Roger -----Original Message----- From: colorsync-users-bounces+graxx=videotron.ca@lists.apple.com [mailto:colorsync-users-bounces+graxx=videotron.ca@lists.apple.com] On Behalf Of Bob Frost Sent: Saturday, July 27, 2013 5:14 AM To: Mike Russell; colorsync-users@lists.apple.com Subject: Re: Color Perception: How does coffee affect color perception? Age affects color perception. By midlife, your color perception has started changing. Bob frost
Hi Roger, Loads of stuff on this, from popular to highly complex articles. I became interested in this when I had a lens with cataract replaced with a clear plastic lens. Back in the hospital waiting room, as my vision slowly returned in the operated eye, I saw that the nurses uniforms were not white/grey stripes, but white/blue stripes! With the eye that had not yet been operated on, the uniforms were still white/grey. After the second eye was done, blues were suddenly much brighter than before. While I had just the one IOL, I played about with yellow filters to see what strength of filter equaled my yellowed lens that had not been replaced. Great fun, and now everything is not only bluer, but sharper as well. Here are just a few bits from various websites: "Also as one ages the lens becomes more yellow. People in their 50s will, for example, exhibit clearly lower spectral sensitivities at the short wavelength end of the spectrum than 10 year olds." .................................................. "In addition to its refractive role, the natural lens inside your eye is also responsible for filtering high-energy blue light commonly found within the sun's rays and some artificial light. As part of the aging process, your natural lens gradually turns yellow and it is thought that this change in color may help to protect the aging retina by filtering more of the these harmful wavelengths." .................................................... "Age-Related Eye Change #3 The lens of the eye gradually yellows with age. Impact: The yellowing of the eye lens affects color perception. For example, the yellowing lens tends to absorb and scatter blue light, making it difficult to see differences in shades of blue, green, and violet. Colors may seem duller, and contrasts between colors will be less noticeable. This may cause confusion when picking out clothes or performing other tasks that require color perception. It also may become difficult to tell where an object ends and its background begins, making it difficult to see curbs or steps, for example. Compensation: A few specific adjustments to lighting and color choices should help alleviate the effects of minor lens yellowing. Try this: •Choose halogen or fluorescent bulbs specifically designed to improve color rendering. Bulbs with a color-rendering index (CRI) above 80 may best help older eyes with color definition. •Use warm contrasting colors, such as yellow, orange, and red, in your home to improve your ability to tell where things are and make it easier to perform daily activities. •Put colored tape on the edge of steps to help make them easier to navigate." ................................................... "Lens •Becomes more yellow with age: Cataracts The graph on the right shows the optical density (-log transmittance) of the lens as a function of wavelength. The curves show the change in density with age. More short wavelength light is blocked at increases ages." - graph attached. .................................................. "Also with age, there is a fall in light transmission by the lens, associated with increased light scatter, increased spectral absorption, particularly at the blue end of the spectrum, and increased lens fluorescence. A major factor responsible for the increased yellowing of the lens is the accumulation of a novel fluorogen, glutathione-3-hydroxy kynurenine glycoside, which makes a major contribution to the increasing fluorescence of the lens nucleus which occurs with age. Since this compound may also cross-link with the lens crystallins, it may contribute to the formation of high-molecular-weight aggregates and the increases in light scattering which occur with age." .................................................. "Lerman & Borkman (1976) described two age-related fluorescent compounds which develop in the lens nucleus. The first showed activation at 340–360 nm with emission at 420–440 nm and could be responsible for lens yellowing. It increased with lens age following the same pattern as the increase in insoluble fractions of lens proteins with age (Clark et al. 1969, Jedziniak et al. 1975). The second, which appeared to be a secondary product of the former being detectable only after the first decade of life, absorbed light at 415–435 nm with emission at 500–520 nm. It remained at a relatively low level until the fourth or fifth decade. A significant increase in the concentration of this fluorogen was seen in advanced, brown colored nuclear cataracts. Lerman & Borkman also noted a progressive decline in transmission of visible light in the aging lens which could be correlated with the increasing concentration of these pigments in the lens nucleus." Bob Frost. -------------------------------------------------- From: "Roger Breton" <graxx@videotron.ca> Sent: Saturday, July 27, 2013 5:05 PM To: <colorsync-users@lists.apple.com> Subject: RE: Color Perception: How does coffee affect color perception?
Daniel and Bob, You guys are great! This may be silly but my first, naïve reaction, is to consider these physiological changes as independent of "color perception"? To me, "perception" refers to some cognitive processing. The fact that, Bob, you report seeing with a stronger "blue" intensity after your cataract removal indicate that your brain does receive the new retinal information, but how is your brain "adapting" to the change is my question? Always curious to know / Roger -----Original Message----- From: Bob Frost [mailto:bobfrost@btopenworld.com] Sent: Saturday, July 27, 2013 2:40 PM To: Roger Breton; colorsync-users@lists.apple.com Subject: Re: Color Perception: How does coffee affect color perception? Hi Roger, Loads of stuff on this, from popular to highly complex articles. I became interested in this when I had a lens with cataract replaced with a clear plastic lens. Back in the hospital waiting room, as my vision slowly returned in the operated eye, I saw that the nurses uniforms were not white/grey stripes, but white/blue stripes! With the eye that had not yet been operated on, the uniforms were still white/grey. After the second eye was done, blues were suddenly much brighter than before. While I had just the one IOL, I played about with yellow filters to see what strength of filter equaled my yellowed lens that had not been replaced. Great fun, and now everything is not only bluer, but sharper as well. Here are just a few bits from various websites: "Also as one ages the lens becomes more yellow. People in their 50s will, for example, exhibit clearly lower spectral sensitivities at the short wavelength end of the spectrum than 10 year olds." .................................................. "In addition to its refractive role, the natural lens inside your eye is also responsible for filtering high-energy blue light commonly found within the sun's rays and some artificial light. As part of the aging process, your natural lens gradually turns yellow and it is thought that this change in color may help to protect the aging retina by filtering more of the these harmful wavelengths." .................................................... "Age-Related Eye Change #3 The lens of the eye gradually yellows with age. Impact: The yellowing of the eye lens affects color perception. For example, the yellowing lens tends to absorb and scatter blue light, making it difficult to see differences in shades of blue, green, and violet. Colors may seem duller, and contrasts between colors will be less noticeable. This may cause confusion when picking out clothes or performing other tasks that require color perception. It also may become difficult to tell where an object ends and its background begins, making it difficult to see curbs or steps, for example. Compensation: A few specific adjustments to lighting and color choices should help alleviate the effects of minor lens yellowing. Try this: •Choose halogen or fluorescent bulbs specifically designed to improve color rendering. Bulbs with a color-rendering index (CRI) above 80 may best help older eyes with color definition. •Use warm contrasting colors, such as yellow, orange, and red, in your home to improve your ability to tell where things are and make it easier to perform daily activities. •Put colored tape on the edge of steps to help make them easier to navigate." ................................................... "Lens •Becomes more yellow with age: Cataracts The graph on the right shows the optical density (-log transmittance) of the lens as a function of wavelength. The curves show the change in density with age. More short wavelength light is blocked at increases ages." - graph attached. .................................................. "Also with age, there is a fall in light transmission by the lens, associated with increased light scatter, increased spectral absorption, particularly at the blue end of the spectrum, and increased lens fluorescence. A major factor responsible for the increased yellowing of the lens is the accumulation of a novel fluorogen, glutathione-3-hydroxy kynurenine glycoside, which makes a major contribution to the increasing fluorescence of the lens nucleus which occurs with age. Since this compound may also cross-link with the lens crystallins, it may contribute to the formation of high-molecular-weight aggregates and the increases in light scattering which occur with age." .................................................. "Lerman & Borkman (1976) described two age-related fluorescent compounds which develop in the lens nucleus. The first showed activation at 340–360 nm with emission at 420–440 nm and could be responsible for lens yellowing. It increased with lens age following the same pattern as the increase in insoluble fractions of lens proteins with age (Clark et al. 1969, Jedziniak et al. 1975). The second, which appeared to be a secondary product of the former being detectable only after the first decade of life, absorbed light at 415–435 nm with emission at 500–520 nm. It remained at a relatively low level until the fourth or fifth decade. A significant increase in the concentration of this fluorogen was seen in advanced, brown colored nuclear cataracts. Lerman & Borkman also noted a progressive decline in transmission of visible light in the aging lens which could be correlated with the increasing concentration of these pigments in the lens nucleus." Bob Frost. -------------------------------------------------- From: "Roger Breton" <graxx@videotron.ca> Sent: Saturday, July 27, 2013 5:05 PM To: <colorsync-users@lists.apple.com> Subject: RE: Color Perception: How does coffee affect color perception?
From: "Roger Breton
The fact that, Bob, you report seeing with a stronger "blue" intensity after your cataract removal indicate that your brain does receive the new retinal information, but how is your brain "adapting" to the change is my question?
I didn't subject myself to laboratory analysis, but before the ops, I preferred sunglasses with a slight blue tint, while now I prefer sunglasses with a slight yellow tint. You could do some experiments on yourself by wearing a pair of yellow tinted glasses with one lens removed (or replaced by a blue tinted lens). How does the brain adapt to that? Is one eye dominant? Or does the brain average the results out?
From my reading on the subject, it seems that color vision is far more variable than some would have us believe.
Bob Frost
participants (7)
-
Bob Frost
-
José Ángel Bueno García
-
Mark Stegman
-
Mike Russell
-
Roger Breton
-
Spinnaker Photo Imaging Center
-
Stefan Ohlsson