#opticalillusion — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #opticalillusion, aggregated by home.social.
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#Polyhedron #Polygons #tiles #opticalillusion #MathArt #MathsArt
The video in this post by @graveolensa
https://mathstodon.xyz/@graveolensa/115885487505867437
about people with 4 color cones having a sphere's worth of hues is fascinating but, being a trichromat, i don't fully understand it or know if its correct. Here is a mathematically simple but scientifically crude analogy between trichromaticity and tetrachromaticity.
A note on the figures, although this is about color vision and the figures have been colored the colors in the figures are just rough guides for trichromats, which most people are. This analogy is too crude for the colors to precisely match a trichromat's color experiences.
The visible spectrum is rounded off to the interval [415 THz, 715 THz]. The cone cells' activation, as a function of the frequency of monochromatic light they receive, are idealized to the piecewise linear spectral sensitivity curves shown in the figure. They are surjective to \([0,1]\) so as to implement Ooqui's "rule of hue". Call them \(r(\nu)\) (red cone), \(g(\nu)\) (green cone), and \(b(\nu)\) (violet cone).
Each cone type has exactly 1 frequency of monochromatic light where it is the only type of cone that is activated and that cone's activation is 1 at that frequency. These frequencies are 415, 565, and 715. At every other frequency in the visible spectrum exactly 2 cone types are activated by monochromatic light and the activation of at least one of them is 1.
(1/6)
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#Polyhedron #Polygons #tiles #opticalillusion #MathArt #MathsArt
The video in this post by @graveolensa
https://mathstodon.xyz/@graveolensa/115885487505867437
about people with 4 color cones having a sphere's worth of hues is fascinating but, being a trichromat, i don't fully understand it or know if its correct. Here is a mathematically simple but scientifically crude analogy between trichromaticity and tetrachromaticity.
A note on the figures, although this is about color vision and the figures have been colored the colors in the figures are just rough guides for trichromats, which most people are. This analogy is too crude for the colors to precisely match a trichromat's color experiences.
The visible spectrum is rounded off to the interval [415 THz, 715 THz]. The cone cells' activation, as a function of the frequency of monochromatic light they receive, are idealized to the piecewise linear spectral sensitivity curves shown in the figure. They are surjective to \([0,1]\) so as to implement Ooqui's "rule of hue". Call them \(r(\nu)\) (red cone), \(g(\nu)\) (green cone), and \(b(\nu)\) (violet cone).
Each cone type has exactly 1 frequency of monochromatic light where it is the only type of cone that is activated and that cone's activation is 1 at that frequency. These frequencies are 415, 565, and 715. At every other frequency in the visible spectrum exactly 2 cone types are activated by monochromatic light and the activation of at least one of them is 1.
(1/6)
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#Polyhedron #Polygons #tiles #opticalillusion #MathArt #MathsArt
The video in this post by @graveolensa
https://mathstodon.xyz/@graveolensa/115885487505867437
about people with 4 color cones having a sphere's worth of hues is fascinating but, being a trichromat, i don't fully understand it or know if its correct. Here is a mathematically simple but scientifically crude analogy between trichromaticity and tetrachromaticity.
A note on the figures, although this is about color vision and the figures have been colored the colors in the figures are just rough guides for trichromats, which most people are. This analogy is too crude for the colors to precisely match a trichromat's color experiences.
The visible spectrum is rounded off to the interval [415 THz, 715 THz]. The cone cells' activation, as a function of the frequency of monochromatic light they receive, are idealized to the piecewise linear spectral sensitivity curves shown in the figure. They are surjective to \([0,1]\) so as to implement Ooqui's "rule of hue". Call them \(r(\nu)\) (red cone), \(g(\nu)\) (green cone), and \(b(\nu)\) (violet cone).
Each cone type has exactly 1 frequency of monochromatic light where it is the only type of cone that is activated and that cone's activation is 1 at that frequency. These frequencies are 415, 565, and 715. At every other frequency in the visible spectrum exactly 2 cone types are activated by monochromatic light and the activation of at least one of them is 1.
(1/6)
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#Polyhedron #Polygons #tiles #opticalillusion #MathArt #MathsArt
The video in this post by @graveolensa
https://mathstodon.xyz/@graveolensa/115885487505867437
about people with 4 color cones having a sphere's worth of hues is fascinating but, being a trichromat, i don't fully understand it or know if its correct. Here is a mathematically simple but scientifically crude analogy between trichromaticity and tetrachromaticity.
A note on the figures, although this is about color vision and the figures have been colored the colors in the figures are just rough guides for trichromats, which most people are. This analogy is too crude for the colors to precisely match a trichromat's color experiences.
The visible spectrum is rounded off to the interval [415 THz, 715 THz]. The cone cells' activation, as a function of the frequency of monochromatic light they receive, are idealized to the piecewise linear spectral sensitivity curves shown in the figure. They are surjective to \([0,1]\) so as to implement Ooqui's "rule of hue". Call them \(r(\nu)\) (red cone), \(g(\nu)\) (green cone), and \(b(\nu)\) (violet cone).
Each cone type has exactly 1 frequency of monochromatic light where it is the only type of cone that is activated and that cone's activation is 1 at that frequency. These frequencies are 415, 565, and 715. At every other frequency in the visible spectrum exactly 2 cone types are activated by monochromatic light and the activation of at least one of them is 1.
(1/6)
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#Polyhedron #Polygons #tiles #opticalillusion #MathArt #MathsArt
The video in this post by @graveolensa
https://mathstodon.xyz/@graveolensa/115885487505867437
about people with 4 color cones having a sphere's worth of hues is fascinating but, being a trichromat, i don't fully understand it or know if its correct. Here is a mathematically simple but scientifically crude analogy between trichromaticity and tetrachromaticity.
A note on the figures, although this is about color vision and the figures have been colored the colors in the figures are just rough guides for trichromats, which most people are. This analogy is too crude for the colors to precisely match a trichromat's color experiences.
The visible spectrum is rounded off to the interval [415 THz, 715 THz]. The cone cells' activation, as a function of the frequency of monochromatic light they receive, are idealized to the piecewise linear spectral sensitivity curves shown in the figure. They are surjective to \([0,1]\) so as to implement Ooqui's "rule of hue". Call them \(r(\nu)\) (red cone), \(g(\nu)\) (green cone), and \(b(\nu)\) (violet cone).
Each cone type has exactly 1 frequency of monochromatic light where it is the only type of cone that is activated and that cone's activation is 1 at that frequency. These frequencies are 415, 565, and 715. At every other frequency in the visible spectrum exactly 2 cone types are activated by monochromatic light and the activation of at least one of them is 1.
(1/6)
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A square paving with hexagons, Yogyakarta, Java, Indonesia
The leaves and cracks almost look like small trees
#TilingTuesday #geometry #tiling #MathArt #photography #design #TravelPhotography #Yogyakarta #Java #Indonesia #OpticalIllusion
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A square paving with hexagons, Yogyakarta, Java, Indonesia
The leaves and cracks almost look like small trees
#TilingTuesday #geometry #tiling #MathArt #photography #design #TravelPhotography #Yogyakarta #Java #Indonesia #OpticalIllusion
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A square paving with hexagons, Yogyakarta, Java, Indonesia
The leaves and cracks almost look like small trees
#TilingTuesday #geometry #tiling #MathArt #photography #design #TravelPhotography #Yogyakarta #Java #Indonesia #OpticalIllusion
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A square paving with hexagons, Yogyakarta, Java, Indonesia
The leaves and cracks almost look like small trees
#TilingTuesday #geometry #tiling #MathArt #photography #design #TravelPhotography #Yogyakarta #Java #Indonesia #OpticalIllusion
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A square paving with hexagons, Yogyakarta, Java, Indonesia
The leaves and cracks almost look like small trees
#TilingTuesday #geometry #tiling #MathArt #photography #design #TravelPhotography #Yogyakarta #Java #Indonesia #OpticalIllusion
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Royal Gala Sees 'Optical Illusion' Moment with Presenter Declan Donnelly
Declan Donnelly's suit appeared like a skirt due to light at the King's Trust 50th anniversary gala in London. See photos and details.
#DeclanDonnelly, #KingsTrust, #RoyalGala, #OpticalIllusion, #LondonEvents
https://newsletter.tf/declan-donnelly-suit-illusion-kings-trust-gala/
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At the King's Trust 50th anniversary gala, Declan Donnelly's suit created an optical illusion, making it look like he was wearing a skirt. This happened as he greeted King Charles and Queen Camilla.
#DeclanDonnelly, #KingsTrust, #RoyalGala, #OpticalIllusion, #LondonEvents
https://newsletter.tf/declan-donnelly-suit-illusion-kings-trust-gala/ -
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🖼️🏭 Street artists paint directly onto high-resolution #photos of dams and power stations. Photographer Joseph Ford then re-photographs these works at the original sites to produce a seamless visual alignment between the #art and the #environment.
👉 https://www.thisiscolossal.com/2026/04/joseph-ford-impossible-street-art-photography-infrastructure/
#photography #infrastructure #streetart #engineering #illusion #creativity #opticalillusion
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A gorgeous ballroom in East Germany, with a beautiful curtain still hanging from the stage. A breeze is blows in through the open door, the curtains curiously do not move 🤔
April Fools! This is a “Trompe l’oeil”; the illusion of three-dimensional objects created by clever painting.
At the right-hand side, a tear in the artwork betrays it. A white stage door can be seen through the gap.
#AprilFools #Trompeloeil #Photography #Germany #Abandoned #Ballroom #OpticalIllusion #Trick #Urbex
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Time out for fun:
https://optical.toys
#puzzles #opticalillusion -
For last week's #CreativeCoding challenge topic of psychedelic, I took the Bezier shape triangle from my last #OpticalIllusion post and made it into a spiral configuration, with some trippy cascading motion. I sped it up for the video here, but you can control the speed to play it as slow as you want in this sketch (the full resolution and framerate and uncompressed will look a lot better of course):
https://openprocessing.org/sketch/2899986 -
For last week's #CreativeCoding challenge topic of psychedelic, I took the Bezier shape triangle from my last #OpticalIllusion post and made it into a spiral configuration, with some trippy cascading motion. I sped it up for the video here, but you can control the speed to play it as slow as you want in this sketch (the full resolution and framerate and uncompressed will look a lot better of course):
https://openprocessing.org/sketch/2899986 -
For last week's #CreativeCoding challenge topic of psychedelic, I took the Bezier shape triangle from my last #OpticalIllusion post and made it into a spiral configuration, with some trippy cascading motion. I sped it up for the video here, but you can control the speed to play it as slow as you want in this sketch (the full resolution and framerate and uncompressed will look a lot better of course):
https://openprocessing.org/sketch/2899986 -
For last week's #CreativeCoding challenge topic of psychedelic, I took the Bezier shape triangle from my last #OpticalIllusion post and made it into a spiral configuration, with some trippy cascading motion. I sped it up for the video here, but you can control the speed to play it as slow as you want in this sketch (the full resolution and framerate and uncompressed will look a lot better of course):
https://openprocessing.org/sketch/2899986 -
For last week's #CreativeCoding challenge topic of psychedelic, I took the Bezier shape triangle from my last #OpticalIllusion post and made it into a spiral configuration, with some trippy cascading motion. I sped it up for the video here, but you can control the speed to play it as slow as you want in this sketch (the full resolution and framerate and uncompressed will look a lot better of course):
https://openprocessing.org/sketch/2899986 -
M.C. Escher remains the undisputed king of visual paradoxes. 🎨
Even when modern tech decodes his illusions, the real magic is how he dreamt up such complex compositions using nothing but a pencil and pure imagination. It is a humbling reminder that while computers are fast, the human mind is the original engine of infinite complexity. 🧠
https://www.youtube.com/watch?v=ldxFjLJ3rVY
Which Escher piece has always left you scratching your head?
#MCEscher #OpticalIllusion #ArtHistory #CreativeGenius #HandDrawn
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M.C. Escher remains the undisputed king of visual paradoxes. 🎨
Even when modern tech decodes his illusions, the real magic is how he dreamt up such complex compositions using nothing but a pencil and pure imagination. It is a humbling reminder that while computers are fast, the human mind is the original engine of infinite complexity. 🧠
https://www.youtube.com/watch?v=ldxFjLJ3rVY
Which Escher piece has always left you scratching your head?
#MCEscher #OpticalIllusion #ArtHistory #CreativeGenius #HandDrawn
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M.C. Escher remains the undisputed king of visual paradoxes. 🎨
Even when modern tech decodes his illusions, the real magic is how he dreamt up such complex compositions using nothing but a pencil and pure imagination. It is a humbling reminder that while computers are fast, the human mind is the original engine of infinite complexity. 🧠
https://www.youtube.com/watch?v=ldxFjLJ3rVY
Which Escher piece has always left you scratching your head?
#MCEscher #OpticalIllusion #ArtHistory #CreativeGenius #HandDrawn
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M.C. Escher remains the undisputed king of visual paradoxes. 🎨
Even when modern tech decodes his illusions, the real magic is how he dreamt up such complex compositions using nothing but a pencil and pure imagination. It is a humbling reminder that while computers are fast, the human mind is the original engine of infinite complexity. 🧠
https://www.youtube.com/watch?v=ldxFjLJ3rVY
Which Escher piece has always left you scratching your head?
#MCEscher #OpticalIllusion #ArtHistory #CreativeGenius #HandDrawn
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M.C. Escher remains the undisputed king of visual paradoxes. 🎨
Even when modern tech decodes his illusions, the real magic is how he dreamt up such complex compositions using nothing but a pencil and pure imagination. It is a humbling reminder that while computers are fast, the human mind is the original engine of infinite complexity. 🧠
https://www.youtube.com/watch?v=ldxFjLJ3rVY
Which Escher piece has always left you scratching your head?
#MCEscher #OpticalIllusion #ArtHistory #CreativeGenius #HandDrawn
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Believe me, *nothing* in this picture is moving.
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A Sense of Doubt blog post-4047 - This Optical Illusion will Mess With Your Mind. https://sensedoubt.blogspot.com/2026/03/a-sense-of-doubt-blog-post-4047-this.html #opticalIllusion #science
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CW: anomalous motion optical illusion
It has been a while since I added anything to my interactive #OpticalIllusion collection. But I want to get back to doing more regular #CreativeCoding exercises, and this one seemed like a good quick project for this #MonochromeMonday.
https://openprocessing.org/sketch/1941150I found inspiration from this webpage of various anomalous motion illusions:
https://www.psy.ritsumei.ac.jp/akitaoka/motion20e.html
There are lots of cool ones there, though prolonged observation may induce dizziness or motion sickness. -
sewing new pillowcases for my couch
fabric: swedish holiday licorice by fableism#sewing #sew #sewingproject #diy #diyfashion #diypatterns #graphic #stripes #opticalillusion
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Mistodon: this #ASCIIart #PenroseTriangle #opticalillusion challenging Euclidean geometry was drawn by Pixeldud and included in the MIST0222 artpack collection released four years ago this month.
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Mistigram: this #ASCIIart #PenroseTriangle #opticalillusion challenging Euclidean geometry was drawn by @[email protected] and included in the MIST0222 artpack collection released four years ago this month.
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I created a set of images from one seed of my #WindsweptInfinity system yesterday. I'll share five, though I wanted to highlight this one first since it has a cool #OpticalIllusion effect that hasn't occurred in any others. The horizontal dividing lines appear to not be parallel due to aspects similar to the cafe wall and Popple rows illusions. You can explore those two in my interactive optical illusions collection, numbers 19 and 20. https://openprocessing.org/sketch/1941150
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I created a set of images from one seed of my #WindsweptInfinity system yesterday. I'll share five, though I wanted to highlight this one first since it has a cool #OpticalIllusion effect that hasn't occurred in any others. The horizontal dividing lines appear to not be parallel due to aspects similar to the cafe wall and Popple rows illusions. You can explore those two in my interactive optical illusions collection, numbers 19 and 20. https://openprocessing.org/sketch/1941150
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I created a set of images from one seed of my #WindsweptInfinity system yesterday. I'll share five, though I wanted to highlight this one first since it has a cool #OpticalIllusion effect that hasn't occurred in any others. The horizontal dividing lines appear to not be parallel due to aspects similar to the cafe wall and Popple rows illusions. You can explore those two in my interactive optical illusions collection, numbers 19 and 20. https://openprocessing.org/sketch/1941150
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I created a set of images from one seed of my #WindsweptInfinity system yesterday. I'll share five, though I wanted to highlight this one first since it has a cool #OpticalIllusion effect that hasn't occurred in any others. The horizontal dividing lines appear to not be parallel due to aspects similar to the cafe wall and Popple rows illusions. You can explore those two in my interactive optical illusions collection, numbers 19 and 20. https://openprocessing.org/sketch/1941150
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I created a set of images from one seed of my #WindsweptInfinity system yesterday. I'll share five, though I wanted to highlight this one first since it has a cool #OpticalIllusion effect that hasn't occurred in any others. The horizontal dividing lines appear to not be parallel due to aspects similar to the cafe wall and Popple rows illusions. You can explore those two in my interactive optical illusions collection, numbers 19 and 20. https://openprocessing.org/sketch/1941150
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This is called the Ebbinghaus illusion. It’s an optical illusion of size perception.
The pink circles are exactly the same size. In the first image I show the effect. In the second I show the same image, modified to reveal the equal size.
https://en.wikipedia.org/wiki/Ebbinghaus_illusion
#EbbinghausIllusion #OpticalIllusion #Brain #Science #Perception
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funny how the two near 0.5 look like a gradient! #opticalIllusion (they're actually two bars with the same color, by accident)
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Cinema on the Streets: 17 Murals That Look Like Movie Stills
Ever walked down a street and felt like you were suddenly inside a Hollywood blockbuster? These 17 masterpieces turn ordinary walls into extraordinary cinematic scenes. From towering monsters peeking around corners to intimate, emotional portraits that feel like frozen film frames, street art is evolving into a form of public storytelling. We’ve collected 17 incredible artworks that blur the line between reality and the silver screen, proving that the world truly is a stage. More: 14 […]https://streetartutopia.com/2026/01/11/cinema-on-the-streets-17-murals-that-look-like-movie-stills/
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Cinema on the Streets: 17 Murals That Look Like Movie Stills
Ever walked down a street and felt like you were suddenly inside a Hollywood blockbuster? These 17 masterpieces turn ordinary walls into extraordinary cinematic scenes. From towering monsters peeking around corners to intimate, emotional portraits that feel like frozen film frames, street art is evolving into a form of public storytelling. We’ve collected 17 incredible artworks that blur the line between reality and the silver screen, proving that the world truly is a stage. More: 14 […]https://streetartutopia.com/2026/01/11/cinema-on-the-streets-17-murals-that-look-like-movie-stills/
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Cinema on the Streets: 17 Murals That Look Like Movie Stills
Ever walked down a street and felt like you were suddenly inside a Hollywood blockbuster? These 17 masterpieces turn ordinary walls into extraordinary cinematic scenes. From towering monsters peeking around corners to intimate, emotional portraits that feel like frozen film frames, street art is evolving into a form of public storytelling. We’ve collected 17 incredible artworks that blur the line between reality and the silver screen, proving that the world truly is a stage. More: 14 […]https://streetartutopia.com/2026/01/11/cinema-on-the-streets-17-murals-that-look-like-movie-stills/
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Cinema on the Streets: 17 Murals That Look Like Movie Stills
Ever walked down a street and felt like you were suddenly inside a Hollywood blockbuster? These 17 masterpieces turn ordinary walls into extraordinary cinematic scenes. From towering monsters peeking around corners to intimate, emotional portraits that feel like frozen film frames, street art is evolving into a form of public storytelling. We’ve collected 17 incredible artworks that blur the line between reality and the silver screen, proving that the world truly is a stage. More: 14 […]https://streetartutopia.com/2026/01/11/cinema-on-the-streets-17-murals-that-look-like-movie-stills/
