Why is it that a skirt can be seen by different people in two opposite colors?

If a skirt is judged only from **, it can be both white gold and black and blue. It can even be blue-brown, blue-gold, etc. The reason why the controversy is big is because people will feel that no matter what the situation, they can shoot this **, the difference is only in the different light environment imagined in their minds.

The platinum party thinks that the scene is backlit, white and blue.

It's just that the shadows are colored blue by the ambient light. The Nerazzurri thought the scene was full of yellow light. Build a model of a platinum dress:

Two completely different clothes, in different brain light environments, can almost get the same **. What you have to understand is that in reality this skirt may be blue and black, but the white balance when taking pictures.

Not very good, very yellowish. This is a comparison chart, the left is the uniform light, the right is the overhead light, you can see the chromatic difference, but in fact, the conscience is relatively close, the simulation does this, everyone understands each other. The blue-black or the platinums try to see if they can see each other's feelings.

This experiment of mine is not to simulate this failed photography, but to try to "visualize" the process of the human brain to recognize the color and light environment of this ambiguous photo. The same two colors can be interpreted by the brain as white gold with a backlit surface, or as blue-black under the influence of yellow light. Even blue gold, blue brown.

All in all. It's kind of like an equation.

There are two solutions. Answer one of them and give points, and the switch party can get full points. To sum up, it's really not "I've lived for so many years and I'm colorblind, nor is it "people who see platinum are not good rods", nor is it "those who say blue and black are talking nonsense with their eyes open", and it's not "I'm going crazy when I keep switching".

This is because, in order to recognize the color of objects in different light and shadow situations, the visual cortex of the brain (to be precise, in the visual cortex V4, the so-called center of color perception) analyzes and corrects the light received from the eye. Why do objects take on different colors? Newton discovered that white light is composed of red, orange, yellow, green, blue, and violet colors.

That is, the perception of "white" light is formed by the entire spectrum of visible light. When the white natural light shines on the object, the object will reflect a certain color of light, which enters the human eye and falls on the retina, and through the three types of human cones, the wavelength of the physical light is converted into nerve signals, which is the beginning of vision. <>

The difference caused by this graph is an interesting phenomenonThere are many reasons for thisReason from the principle of visual imaging。First of all, to be clearThe light is different,The difference in color saturation will affect the perception of color, in addition to excluding these effects,It is also possible to see the same ** on the same monitor as different colors.

The eye perceives light and color, mainly the cone cells on the retina, and the rod cells are at work, the cone cells are larger, and the rod cells are smaller. They are all located in the macular area. After the two cells receive information about light and color, the optochrome will be combined differently to present different colors for imaging on the retina.

These "chemical reactions" eventually result in changes in electrical potential, and this "electrical activity" is transmitted by the nervous system to the brain, which then forms the "mental color", which is the color we see.

The ratio of cones to rods is not the same, and the function is different, so there will be differences in the colors we 'see' at first, and then there will be differences in the process of reading by the brain. In most cases, most people will see subtle differences in color, but not much, whileWhen the colors are not so saturated and at a critical point, it is possible to "read" the colors in completely different ways.

The "Platinum Pie" will have poor night vision, and this inference does not hold water:

The first thing to understand is how the two types of vision cells work. Cone cells mainly work when the light is relatively strong, and have the ability to perceive light and distinguish colors, while rods mainly work when the light is low, and can only perceive light, but cannot distinguish colors. Therefore, if the skirt is a blue and black color in reality, then it is valid to say that the cone cells on the "blue-black pie" retina function better.

But the opposite conclusion makes no sense that the "platinum faction" has poor night vision. Because rods that work in the dark are rods that cannot distinguish colors, and color discrimination errors can only be inferred from cones, and have nothing to do with rods, the battle between "blue-black" and "platinum" cannot be linked to night vision.

The reason why people see dresses of different colors is largely due to the brain's principle of receptivity to color information.

Seeing "blue + black" indicates that the cone cells on the retina have a high ability to perceive color, which causes the eye to actively eliminate some distractions to observe the most realistic colors. And if you see "white + gold", then it proves that the eye will deviate the perception of color in low-light conditions, resulting in a mixture of colors (such as red and green), so you will see gold in **.

**It was first posted online by 21-year-old Scottish singer Caitlin McNeil. McNeil revealed in an interview that the dress was taken from her friend's wedding. Some people think that the skirt in ** is "white gold", and some people think it is "blue and black".

Abroad** ophthalmologists in specialized hospitals have been contacted to try to obtain a more authoritative explanation. The original**, corrected** skirt color shared by swiked, the answer to "blue + black" is already very obvious. The color of the skirt after further excessive ** tends to be more "white + gold", but this is just an illusion.

<> usually, the system works very well. However, this ** touches the edge of the senses. This may be because the nerves of the human brain are encoded in this way.

The human eye has evolved to see clearly in daylight, but the color of daylight changes from pink at dawn, to blue-white at noon, and back to pink at dusk. Bevil Conway, a neuroscientist who studies color and vision at Wellesley College, said, "When you see this one, your brain is correcting for this color difference based on daylight.

So if people think that the light source is blue and ignore the blue part, they see white and gold; And if they ignore the golden part, they see blue and black. (However, Conway himself somehow saw blue and orange.) ）

We asked our excellent design team to do a little bit of processing on this one on Photoshop, and gave the RGB values of some of the color blocks on it. We think this ** can finally clarify the question of "what color is the skirt" - the result is really close.

<> take the ** version on Buzzfeed as an example, in this map, PS says that the blue people see is indeed blue, but this is most likely because of the background rather than its actual color. "Look at where your RGB value is equal to R93, G76, B50, if you just looked at these numbers and asked you to say what color it is, what would you say? Conway asked.

Belch. A little orange?

That's right," Conway said. "But our PS played a bad trick - with a white background, it turned out to be black. If you put this color on a neutral black background, I bet it will appear orange.

He also tried these on Photoshop, and he thought that the colors of the skirt should be blue and orange.

The point is that your brain tries to push the ambient light out of the outside before judging the color of the skirt. Even Ness, who somehow saw white and gold, admitted that the skirt was in fact most likely blue. He said

I also printed the ** out. Then cut out a small part and looked at it carefully. After completely excluding the ambient color, the color of the skirt is somewhere in between, rather than such a dark blue.

My brain thinks the blue color comes from an external light source. Others believe that blue is the color of the skirt itself. ”