Posts tagged ‘Barbarian Blog’

Pondering Images

Via the South Bend Seven, comes this interesting post on images at Barbarian Blog.

The total number of pixels [on an HDTV screen]  is 1920 horizontally x 1080 vertically = 2,073,600 pixels. There are 256 possible intensities of red, green and blue for each pixel, so that's 2563 = 16,777,216 possible colors. To figure out how many possible images there are, we need to raise the second number to the power of the first, so 16,777,2162,073,600 = 1.5 * 101,4981,180 possible images. That's a pretty big number "“ it's almost a million and a half digits long. Printing it in 10 point Monaco would take over 2,700 pages of paper. Scientists estimate that there are 1080 atoms in the observable universe "“ a tiny number in comparison.

However big it may be, the fact that the number is finite is a surprising thing to realize. It means that every possible image has a unique ID number. So instead of asking me, "did you see that picture of MIA performing pregnant at the Grammys", you might ask, "did you see image number 1,394,239,...,572?" Obviously that is totally impractical and it would make you a huge nerd, but it's interesting that you could.
More in the same vein at the link.  I was surprised that the number of states a video screen could be in was so much larger than the molecules in the universe.