From the invisible image to the cafe wall: The best brain-bending optical illusions of 2017 revealed
- Best Illusion of the Year Contest has revealed the top pics from around the world
- This includes the viral Skye Blue Cafe Wall illusion, and 'Shape from motion only'
- Also includes illusion in which lines 'grow' and 'shrink' based on arrow direction
An international panel of judges has revealed this year’s most mind-boggling illusions from around the world.
From the viral Skye Blue Café Wall illusion to a phenomenon in which recognizable shapes arise from flashing pixels, the top picks from the Best Illusion of the Year Contest represent ‘ingenuity and creativity’ in images that play tricks on your mind.
In the contest, hopefuls were invited to submit 1-minute YouTube videos of illusions published no earlier than 2016, across all walks of the sensory and cognitive experience.
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From the viral Skye Blue Café Wall illusion (above) to a phenomenon in which recognizable shapes arise from the flashing of pixels, the top picks from the Best Illusion of the Year Contest represent ‘ingenuity and creativity’ in images that play tricks on your mind
The judges awarded the top prize to a video called ‘Shape from motion only,’ created by Hedva Spitzer, Dana Tearosh, and Niv Weisman of the School of Electrical Engineering at Tel Aviv University.
At first glance, the video features just fuzzy, nondescript pixels.
But, as these pixels move, recognizable shapes emerge – including text, rabbits, and even the famous Rubin’s Vase illusion.
‘Both the object and the background are created by flashing the pixels on and off, while the only difference is expressed in the temporal properties,’ the authors explain.
The video above shows the winning illusion, called ‘Shape from motion only.' At first glance, the video features just fuzzy, nondescript pixels. But, as these pixels move, recognizable shapes emerge

According to the creators, the illusion relies on information in the temporal domain (represented right), without giving clues in the spatial domain (represented left)
‘We examined various properties of the phenomenon such as: statistics and object size.’
Second prize was granted to professional magician and illusion artist Victoria Skye, from Roswell, Georgia, for her take on the Café Wall illusion.
In this illusion, dark blue rows appear to slant toward and away from each other despite being completely parallel.
Earlier this year, Skye told the DailyMail.com that the key to the illusion are the black and white diamond 'targets' at each intersection.

Second prize was granted to professional magician and illusion artist Victoria Skye, from Roswell, Georgia, for her take on the Café Wall illusion. In this illusion, dark blue rows appear to slant toward and away from each other despite being completely parallel
When looking at the lines vertically, one can see that the squares that make up the diamond alternate their position.
'The alternating targets create the effect,' said Skye.
'I developed my version of the illusion by reviewing many dozens or hundreds of visual illusions over the years.
'In my version of the famous Café-Wall illusion, I have mixed together both the original Café-Wall illusion that was made famous by Richard Gregory - and which showcases the brickwork laid on the wall of a café in Bristol, England - with the work of Akiyoshi Kitaoka, who has developed a number of different versions using the same underlying effect.’

The third place illusion revealed the mind-boggling phenomenon by Gianni A. Sarcone, in which a segment of a given length appears longer or shorter depending on the direction of an arrow head at its ends


A red dot in the line shows how the line itself does not change – but, as the arrowheads shift orientation, the segment appears to grow or shrink
Skye's café wall illusion falls in the class of illusions is called the 'twisted cord' class of illusions, because the first version - by the Scottish physician James Fraser - was in the form of a twisted cord.
The third place illusion revealed the mind-boggling phenomenon by Gianni A. Sarcone of the Archimedes Laboratory Project, Italy, in which a segment of a given length appears longer or shorter depending on the direction of an arrow head at its ends.
A red dot in the line shows how the line itself does not change – but, as the arrowheads shift orientation, the segment appears to grow or shrink.
‘The perceptual increasing and decreasing of the segment occurs in a very short time,’ the creator explained.
‘Thus, I suppose it is more a physiological phenomenon, rather than a psychological bias.
‘Our attention seems to be attracted by the receptive field within the V-shaped arrow heads, causing an illusory inward or outward shift of the ends of the line.’
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