You may think this is going temporarily insane. Stare at the black dot in the middle of the picture in this video (You can also pause the video if it’s playing fast or you can also check the picture by clicking on the image), and this monochrome image of the castle will suddenly appear in full color. This is actually a common optical illusion. The black and white image of Dunstanburgh Castle in Northumberland is replaced by a false color image for 30 seconds before switching back to black and white. This desensitizes cone cells in the eye, meaning when the black and white image is shown again, and it appears to be in color, before our retina readjusts.
This trick was shown off as part of a BBC series on color last year.Dr. Helen Czerski of University College London: ‘By staring at the dot in the middle of the screen, my brain, and if you do it your brain too does something remarkable. I find this absolutely fascinating. In my head a full color image was created by a photograph that clearly contains no color.’
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Share us who able to see this illusion?