Sunday, December 07, 2008

Our eyes deceive us

When I was taking the image processing module in my last semester, I learnt that our eyes are actually low pass filters. What this means is that from a far distance, we won't be noticing strong "edges" (e.g. pimples) from a person's face and we'll see people's face as clear and smooth

To put this to experiment, consider this 'optical illusion' I found on the web

When you look at this picture in a closer look you see Albert Einstein.
But, if you stand 5 meters (about 16 feet) distance. It will become Marilyn Monroe ...

So, what happens is, our eyes removes all the 'edges' in the picture; removing the wrinkles, certain parts of the hair, etc. Ah, I may not make any sense but what the heck! Just enjoy the illusion.

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