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This optical illusion will baffle and delight you.
The researchers Oliver Flynn and Arthur Shapiro have developed the illusion "Perpetual Diamond", they describe the illusion as producing "a continuous and unambiguous movement in one direction, even if the location never changes physically ".
Check it here:
Perptual diamond: the diamond remains fixed in one place but seems to move up, down, left or right. See how far you can be from your screen before the effect disappears. From https://t.co/XRFKTtjOfm pic.twitter.com/af7BOUCvfC
– Arthur Shapiro (@agshapiro2) June 2, 2019
The spectacular illusion is produced by the flashing diamond background in combination with its thin edges. The diamond appears to move from top to bottom, from left to right. The direction of this movement is determined by the 'relative phases of the luminance modulation between the sidebands and the background'.
Illusion can be used to test color perception
The researchers say that since the motion is generated by the contrast signals between the contour strips and the background, the illusion can potentially be used as a tool for space contrast, time contrast tests , gain contrast and color contrast.
The researchers noted that since the movement of the diamond is generated by the only change of contrast signals, it does not show any clue as to its possible orientation or direction until it is animated.
This means that it may be possible to use it for future studies on color by experimenting with different parts of the illusion. For example, contrast gain, motion integration, and edge thickness modification of different results can be produced, which is useful for different types of tests.
GIF spinning autism test
It's fun to play with optical illusions, but they can also offer really interesting insights into how our brain works and, interestingly, about the differences between our brains. Last August, a group of Italian and Australian scientists presented a paper describing how a GIF in optical illusion could be a useful tool in the diagnosis of autism.
The GIF of a rotating column could be used as part of other tests to help medical experts track autistic traits. The test badumes that a person's pupils change in size as they look at dark or light images.
This can be used, in turn, to badyze where a person's attention is focused. The images used in the test show a sheet of white dots moving in one direction and a leaf of black dots moving in the other direction.
For most people who observe GIF, it will look like a 3D cylinder of moving points in rotation. But. the way people come to this conclusion differs.
Useful indicator
Some people need to focus on the white dots to observe the phenomenon, for others it is the black dots, and others can see the picture in full and observe the entire GIF and all his points at once. While your eyes are trying to decipher the image, your students are doing different things.
For those who examine the points separately, moving from black dots to white dots will cause their students to grow and contract quickly. If you look at the picture for a moment, your students will keep a more uniform size.
The researchers found that people whose pupils oscillated when they looked at the rotating cylinder were more likely to have autistic tendencies.
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