Show HN: Rainbow – an attempt to display colour on a B&W monitor
anfractuosity.com
Show HN: Rainbow – an attempt to display colour on a B&W monitor
1–10 of 61 posts
Re: Show HN: Rainbow – an attempt to display colour on a B&W monitor
#2One reason Color TV wasn't implemented like this is the need for a compatible signal and the ability to decode the compatible signal with analog circuitry.
Re: Show HN: Rainbow – an attempt to display colour on a B&W monitor
#3This was actually a "thing" back in the 1950s. Apparently the results were awful:
Re: Show HN: Rainbow – an attempt to display colour on a B&W monitor
#4I wonder if a b/w CRT might work better.
Re: Show HN: Rainbow – an attempt to display colour on a B&W monitor
#5One reason Color TV wasn't implemented like this is the need for a compatible signal and the ability to decode the compatible signal with analog circuitry.
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Re: Show HN: Rainbow – an attempt to display colour on a B&W monitor
#6This was actually a "thing" back in the 1950s. Apparently the results were awful: http://www.earlytelevision.org/color_filter.html
Nice ads :) They claim it gives less eyes strain, is it true?
Re: Show HN: Rainbow – an attempt to display colour on a B&W monitor
#7This was actually a "thing" back in the 1950s. Apparently the results were awful: http://www.earlytelevision.org/color_filter.html
Funny ads ! And my ad blocker didn't block them :)
Re: Show HN: Rainbow – an attempt to display colour on a B&W monitor
#8That's awesome! I guess diffraction of light between the original pixel and the filter is also a reason for the low quality.
It would be nice if the author explained a bit more how he printed those pdfs to such a resolution and precision. Is a home printer sufficient ?
Re: Show HN: Rainbow – an attempt to display colour on a B&W monitor
#9That's awesome! I guess diffraction of light between the original pixel and the filter is also a reason for the low quality. It would be nice if the author explained a bit more how he printed those pdfs to such a resolution and precision. Is a home printer sufficient ?
The size of the acetate is around ~A2 size, I got the three acetate sheets printed by printer service for around £35.
https://github.com/anfractuosity/rainbow/blob/master/rainbow... is the code that I created to generate the pattern.
A home printer may work also though, as they're pretty high resolution these days, I just don't have an inkjet printer at the moment.
I'm kind of curious about https://en.wikipedia.org/wiki/Duratrans too, instead of acetate and ink, but they seem very dear.
Re: Show HN: Rainbow – an attempt to display colour on a B&W monitor
#10Tektronix did it with a totally wild set of LCD color filter shutters over the whole face of the CRT, and then sequential color fields. It meant you got the whole spatial resolution of the display, but one third the temporal resolution. Similar to color-wheels in DLP projectors, really.
The system was called NuColor, if you want more detail.
The Bayer filter method in TFA is sensitive to perfect alignment between the filter and the image, which proved impractical in the real world. Sure makes for a neat experiment, though.