History of the Pixel as Fast As Possible
Techquickie
·Techquickie
·2015-05-07
·
720 words · ~3 min read
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the word pixel comes from the words picture element and today's video is all
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about the history of the pixel it begins
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all the way back in 1839 when the first practical
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commercially available process of Photography was introduced it was called
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the dogar type and it involves all of this stuff but photography only
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continued to improve from there and soon the dogar type was obsolete photography
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was pretty much black and white until the first permanent color photograph was
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taken in 1861 by a man named James Clerk Maxwell
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what he did was capture three black and white images each through a different
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filter red blue and green by projecting
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each of these images back through their respective colored filters and onto a
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screen the final colored image was able to be reconstructed and here it is it's
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a Tartan ribbon Tartan is also what spell Che always tries to change my name
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to anyway this process of capturing just the primary colors of red green and blue
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light works so well that we still use it to this day because red green and blue
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are primary additive colors you can mix them together in different proportions
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to achieve any color you like continuing along the timeline in 1926 a man named
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John loie bear demonstrated the first televised moving images using a
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mechanical television set that used a rapidly rotating npov scanning disc it
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was grayscale and limited to 12.5 frames
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a second and just 30 lines of resolution but it was very impressive for the time
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notice how we're measuring the resolution in lines not pixels pixels
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hadn't been invented yet but we're getting closer later in 1927 filot T
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Farnsworth demonstrated the completely electronic cathode ray tube television
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set the CRT was definitely superior to the mechanical television sets
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especially since it had no moving parts here's how it works you've got a sealed
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glass tube with a vacuum inside at one
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end you've got an electron gun which is exactly what it sounds like this gun
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shoots out a varied stream of electrons which are then steered by the magnets
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such that they land upon the phosphor covered screen at the other end of the
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tube forming a picture and it's done so quickly that you can't even see it
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happening color television was first introduced in the
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1950s and they worked in a very similar
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way instead of just one electron gun now you had three one for each of the
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primary colors of red green and blue the beams would hit an array of colored
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phosphors called Triads these Triads are
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still not quite pixels the color TV standard at the time was 512 distinct
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horizontal lines it wasn't until the digital age that those video lines were
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further sliced into rectangles which made digital representation of an image
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possible and thus the pixel was finally born today pixels come in a variety of
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shapes and sizes on on a variety of screens like plasma OLED and LCD
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displays which have rendered CRTs mostly obsolete pixels have continued to get
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smaller and smaller with better frame rates and better color depth we've
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already made videos about all these topics which you can check out right
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for watching this episode a fast as possible give us a like or a dislike
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share subscribe leave a comment do all that YouTube stuff and we'll see you
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next time