5 ms·

800 horizontal pixels, but half of them can contain no red and the other half can contain no blue. Someone should cue the lawyers from the dithered LCD lawsuits

by jws 17y ago

800 horizontal pixels, but half of them can contain no red and the other half can contain no blue. Someone should cue the lawyers from the dithered LCD lawsuits. They will have a field day with this.

ars 17y ago
That's not accurate. The human eye uses primarily green to detect resolution. Red and blue are used for color. I wish I could find it, but there was an online example, where someone took a picture, divided it into the three channels, then pixelated (mosaic) one channel at a time and recombined it. When he did green you saw it right away. With red it took some pixelation before you could see it. And with blue it took a LOT of pixelation before you noticed anything.
- mortenjorck 17y ago
  Still, it's in the same category as the LCD panel dithering suit referenced. Both are measures that technically reduce fidelity but are effectively invisible to the naked eye.
- rbabich 17y ago
  "Your eyes suck at blue": http://nfggames.com/games/ntsc/visual.shtm http://nfggames.com/games/ntsc/visual.shtm
  - ars 17y ago
    Thank you! I've been looking for that page for so long.
wmf 17y ago
The OLPC uses a similar technique; apparently the effective resolution is not totally obvious: http://pixelqi.com/blog1/2008/05/27/higher-resolution-than-we-thought-the-xo-laptop-screen/ http://pixelqi.com/blog1/2008/05/27/higher-resolution-than-w...
ugh 17y ago
All designs that are intended to be used by humans can profit greatly from knowing the abilities and constraints of human senses. Lossy audio compression works so great because of our initmate knowledge of how human hearing works. The trick this screen uses isn't even exactly new. JPG compression has done something very similar for ages (http://en.wikipedia.org/wiki/YCbCr http://en.wikipedia.org/wiki/YCbCr and http://en.wikipedia.org/wiki/JPEG#JPEG_codec_example http://en.wikipedia.org/wiki/JPEG#JPEG_codec_example). Digital cameras also use that trick.

by jws 17y ago

800 horizontal pixels, but half of them can contain no red and the other half can contain no blue. Someone should cue the lawyers from the dithered LCD lawsuits. They will have a field day with this.

ars 17y ago

That's not accurate. The human eye uses primarily green to detect resolution. Red and blue are used for color. I wish I could find it, but there was an online example, where someone took a picture, divided it into the three channels, then pixelated (mosaic) one channel at a time and recombined it. When he did green you saw it right away. With red it took some pixelation before you could see it. And with blue it took a LOT of pixelation before you noticed anything.

mortenjorck 17y ago
Still, it's in the same category as the LCD panel dithering suit referenced. Both are measures that technically reduce fidelity but are effectively invisible to the naked eye.
rbabich 17y ago
"Your eyes suck at blue": http://nfggames.com/games/ntsc/visual.shtm http://nfggames.com/games/ntsc/visual.shtm
- ars 17y ago
  Thank you! I've been looking for that page for so long.

wmf 17y ago

The OLPC uses a similar technique; apparently the effective resolution is not totally obvious: http://pixelqi.com/blog1/2008/05/27/higher-resolution-than-we-thought-the-xo-laptop-screen/ http://pixelqi.com/blog1/2008/05/27/higher-resolution-than-w...

ugh 17y ago

All designs that are intended to be used by humans can profit greatly from knowing the abilities and constraints of human senses. Lossy audio compression works so great because of our initmate knowledge of how human hearing works. The trick this screen uses isn't even exactly new. JPG compression has done something very similar for ages (http://en.wikipedia.org/wiki/YCbCr http://en.wikipedia.org/wiki/YCbCr and http://en.wikipedia.org/wiki/JPEG#JPEG_codec_example http://en.wikipedia.org/wiki/JPEG#JPEG_codec_example). Digital cameras also use that trick.