Visual demo that people can't see blue very well

Of the three primary colors, people (homo sapiens) see green best, followed by red, but we really suck at seeing blue.  This page:

http://nfggames.com/games/ntsc/visual.shtm

is a nice demonstration of just how much we suck at seeing blue, especially compared to green.  Most image and video compression takes advantage of this fact, and sacrifices a ton of bits devoted to transmitting the blue portion of an image.

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