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It makes sense for the light to be red-tinted as the illumination source is the sunrise. All of our perceptual experiences are informed by this kind of processing, resulting from context and previous knowledge. I want to emphasize that this is not just a isolated weird case. What we perceive is a constructed illusion, based upon algorithms that make reasonable assumptions about distance, shading, size, movement, and color – but they are assumptions, none-the-less, and sometimes they can be wrong or misleading. The blue and green stripes are actually the exact same color. Our brains perceive them differently because of the surrounding colors, which force our brains to make different assumptions about shading, and therefore they correct the color in opposite directions.
Marie Rogers is a PhD student with the Sussex Colour Group, investigating how colour word learning influences colour perception and cognition. She lives in lovely Brighton and her favourite colour is purple. It appears to be because of different interpretations of how the scene is illuminated. The brain automatically “processes” visual input before we consciously perceive it.
Initial viral spread
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"We discovered a novel property of color perception and constancy, involving how we experience shades of blue versus yellow," the researchers wrote in the study. Then, the researchers inverted the image so that the lighter stripes appeared gold and the darker stripes appeared blue. Now, nearly 95 percent of the participants reported seeing the lighter stripes as "vivid yellow." The researchers confirmed these findings in another group of 80 participants. For example, say you know your mug is white, but the light being reflected from the mug is slightly red. The brain can then discount a certain amount of red tint from the rest of the scene you are seeing. Other contextual knowledge may come into play, for example you are drinking coffee by the window at dawn.
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If you see black and blue your retina’s cones are higher functioning which results in your eyes doing “subtractive mixing”. All related philosophical and epistemological debates aside, let’s get down to the science of how and why the general public can’t agree on the color of this fashionable dress. There is an entire subfield of psychology called sensation and perception, within which vision scientists vastly outnumber the researchers who devote their studies to the other senses.
The phenomenon originated from a washed-out colour photograph of a dress posted on the social networking service Facebook. Within a week, more than ten million tweets had mentioned the dress, using hashtags such as #thedress, #whiteandgold, and #blackandblue. Although the dress was eventually confirmed to be coloured black and blue, the image prompted much online discussion of different users' perceptions of the colour of the dress. Members of the scientific community began to investigate the photograph for new insights into human colour vision.
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On 28 February, Roman announced that they would make a single white and gold dress for a Comic Relief charity auction. In the case of the blue and black dress, the brain interprets the colors differently depending on whether the dress is seen in shadow or in direct light. The blue and black dress illusion highlights the importance of lighting in color perception. It also shows how the human brain is constantly interpreting the world around us, and how our perception of reality is often subjective.
For example, fluorescent lights give off a higher percentage of yellow light than what is found in the color spectrum of daylight. However, we don’t see everybody and all things as yellow-tinged when we are indoors under fluorescent lighting conditions. The brain works to subtract out the extra yellow, in other words to compensate for the colors present in the light rays of the illuminant in order to yield our ultimate perception.
Black/Blue and Yellow/White dress illusion.
What’s even more amazing is that, despite being an optical illusion, the dress appears blue and black to some people and white and gold to others. The “illusion dress” is a dress that appears to be one color when seen in person, but looks like a different color when seen in photographs. The most famous example of this is the “blue and black” dress that went viral in 2015. The dress was actually a blue and gold color, but appeared black and blue in photographs.
No synthetic stimuli have been constructed that are able to replicate the effect as clearly as the original image. The dress was identified as a product of the retailer Roman Originals, which experienced a major surge in sales of the dress as a result of the incident. The retailer produced a one-off version of the dress in white and gold as part of a charity campaign. Take a look at the original, but stare at it for around 30 seconds.
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