Color perception Thursday
I lifted this image from the brilliant Richard Wiseman . It illustrates another cool quirk about human eyes and their ability to perceive color.
Click on the image below and it will start its animation. Stare at the black dot in the center of the photograph.
Did you spot it?
When the image changes, it's a black and white photo, but your eyes need to see it as a everyday colour picture for more than one seconds until your eyes regulate. Go back and try it once more if you overlooked it.
What's occurring there is what is referred to as a bad afterimage. When you stare at something lengthy sufficient, the cone cells on your retina adapt to the image and forestall processing new information. They move right into a comments loop that maintains to send information on your brain that is a replica of the statistics they've already despatched.
Once the photo they're perceiving modifications, it takes them a couple of seconds to evolve to the brand new facts. In the lag time, your mind can not make any sense out of the signals that it's getting so it greater or less makes up what it expects to be there.
Afterimages are why you can't see shades as it should be if you stare at them for too lengthy.
Afterimages do not simply work on still pictures either. This one actions and it is cool past description.
Human eyes and human brains are amazing machines however they may be fallible. It's crucial to understand in which the chinks in the armor are.