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The best optical illusions leave us questioning our own eyes, and sometimes even our sanity. And that's just how this 'new' optical illusion was accidentally discovered.Illustrator to make materials for a video project when found himself having to blink and do a double take.
The illusion has been given the catchy technical name of"bumpy circle illusion" or BCI for short. The use of such plain English may be intentional, or it may be because scientists aren't yet sure exactly what is happening in the illusion. It seems simple, and we immediately assume that the impression is caused by the little difference in luminance between the circle and the square shapes behind it, but scientists haven't yet worked out exactly why it happens.
Ishikawa worked with the experimental psychologist and visual perception specialist Shuichiro Taya at Keio University to try to get to the bottom of it, and the result is aWhile it notes that the illusion could be caused by optical blur or perception depending on the lower-spatial-frequency channel, the authors suggest that experimentation with a low-pass filter would appear to rule out the influence of this alone.
The researchers experimented with variations of the optical illusion and the application of a low-pass filterOther theories include the disruption of edge orientation detection in the early stage stage, however, the researchers aren't sure why the illusion appear to only occur when the checkered pattern is placed outside the circles, not inside the circles.
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