#研究分享#【黑白动图营造视错觉】

#研究分享#【黑白动图营造视错觉】把屏幕亮度调到最高,把室内光线调暗,盯着图中变化的香蕉,能看到什么颜色?和“旋转的车轮”类似,大多数人会看到绿色,有人看到黄色,还有少数人看到红色。科学家认为,颜色本不存在,是大脑根据过去的经验把光转化成颜色,因此不同人会有不同感知。http://www.looooker.com/archives/15028

注:对闪光敏感者和癫痫者不宜。

banana_illusion

benhams-illusion

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What do YOU see? Black and white video can fool your brain into viewing COLOR

  • Do not watch if you have epilepsy or you are sensitive to flashing lights
  • To get the full effect, put screen's luminosity to full and dim room lights
  • Stare at the different flashing images and note the colours that appear 
  • Illusion is designed to show you how colour is a construct of the mind

A famous optical illusion, known as the Fechner effect, can trick your brain into seeing flashes of colour that aren’t there.

One well-known example is Benham’s Top. Stare at the black and white wheel long enough and you may see a colour appear out of nowhere.

Now, one artist has adapted the technique to make the results last longer - and he claims his illusion proves that colour is just a construct of the mind.

To take the test scroll down to the video and open it full screen, in a dark room, on full luminosity...

WARNING: Do not watch if you suffer from photosensitive epilepsy or are sensitive to flashing lights

The project, dubbed ‘Zebra Rainbow’, was created by California-based, Kenneth Morehouse.

When staring at Benham's Top, many people say they see green, others see yellow and a few see red – and some may not see anything at all. The effects, however, are temporary.

In the latest illusion, the visual artist combines the Fechner colour effect with common objects associated with one colour, such as a banana being recognised as yellow.

‘With Fechner colour and Benham’s top the colors always seem fleeting, in an ephemeral way, never really resting in one place,’ Mr Morehouse told DailyMail.com

‘My video uses a very specific structure of frames, in specific rhythms to try to hold onto one colour.

‘I was interested in how the viewer starts to question weather the colour is a physiological response to the structure of the video or if a mental projection of colour is occurring.’

The video was calibrated for a MacBookPro but should work to some degree on other computers.

Place the screen’s luminosity to full brightness and make sure you watch the video in a dark room. 

Scientists have long debated the existence of colour. For instance, in a new book, 'Outside Color', Dr Mazviita Chirimuuta puts forward the debate that colour is, in fact, an illusion.

Of all the properties that objects appear to have,' writes the University of Pittsburgh professor, 'colour hovers uneasily between the subjective world of sensation and the objective world of fact.'

Optical illusions, such as the blue and black dress that went viral this year, show how objects have colours that observers perceive differently.

The New Republic notes that, like a seal that leaves a stamp in hot wax, an object's color leaves its imprint temporarily on our eye.

This means if you're looking at an image that is consistent with your past experiences, your brain behaves as if the objects in the current images are also real in the same way.

 

'If we step back a moment,' Chirimuuta writes, 'we can appreciate how very weird it is to even expect there to be a connection between the manifest visual world, brought to us by our senses, and the rarefied scientific image of a world made up of physical particles.

But it's not just about lighting conditions or optical illusions - evidence is mounting that until we have a way to describe something, we may not see it’s there.

Ancient languages, for instance, didn't have a word for blue and scientists believe as a result our ancestors didn't notice the colour even existed.

Several years ago, researchers showed some of the Himba tribe a circle with 11 green squares and one blue.

The study found they could not pick out which one was different from the others, or took much longer to make sense of it.

However, the same tribe has many different words for green. When they were shown squares with one green a different shade, they could pick it out immediately.

 

标题: What do YOU see? Black and white video can fool your brain into viewing COLOR

来源:dailymail

链接:http://www.dailymail.co.uk/sciencetech/article-3155233/What-Black-white-video-fool-brain-viewing-COLOUR.html


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