cheese_greater@lemmy.world to Ask Lemmy@lemmy.world · 1 year agoHow do Hue Bulbs do millions of different colors, what sorcery is this?message-squaremessage-square27fedilinkarrow-up127
arrow-up127message-squareHow do Hue Bulbs do millions of different colors, what sorcery is this?cheese_greater@lemmy.world to Ask Lemmy@lemmy.world · 1 year agomessage-square27fedilink
minus-squareKptnAutismus@lemmy.worldlinkfedilinkarrow-up18·1 year ago that’s how. one of the 3 LEDs can have 256 levels of brightness (off included) take that to the power of three, and you have 16 million colours. but no mortal can actually tell the difference between 255, 255, 255 and 255, 254, 255.
minus-squareUsernameblankface@lemmy.worldlinkfedilinkarrow-up4·1 year agoYeah, essentially the same sourcery behind every pixel of any modern display. The bulb is one pixel. So… Wait… Does this mean thousands of Hue bulbs can be a display screen? Has this been done?
minus-squareKptnAutismus@lemmy.worldlinkfedilinkarrow-up1·1 year agothose really huge displays are often millions of individual RGB LEDs. it would just be a software nightmare to do with hue bulbs.
minus-squareHyperlon@lemmy.worldlinkfedilinkarrow-up0·1 year agoIf they were hardwired yes, but zigbee with millions of bulbs?
minus-squareconciselyverbose@kbin.sociallinkfedilinkarrow-up0·1 year agoI’m guessing you’d hit interference at some point. But also latency would be bad and you almost definitely couldn’t synchronize them well.
minus-squareHyperlon@lemmy.worldlinkfedilinkarrow-up2·1 year agoYeah, I’ve done something similar with ~120 wifi bulbs for a light show that responded to music and that worked fairly well but I doubt it would have worked with more than a few hundred.
minus-squarefunkajunk@lemm.eelinkfedilinkEnglisharrow-up2·1 year ago but no mortal can actually tell the difference between 255, 255, 255 and 255, 254, 255. Maybe YOU can’t, but don’t speak for the rest of us 😤
minus-squarevariants@possumpat.iolinkfedilinkEnglisharrow-up1·1 year agoNext you’re going to tell me the human eye is capable of differentiating fps above 30
minus-squareVictor@lemmy.worldlinkfedilinkarrow-up1·edit-21 year agoAnd a 4K TV with 10-bit HDR support can show (2^10 )^3 × 3840 × 2160 = 8,906,044,184,985,600 different images.
minus-squaretal@lemmy.todaylinkfedilinkarrow-up1·edit-21 year ago but no mortal can actually tell the difference between 255, 255, 255 and 255, 254, 255. https://en.wikipedia.org/wiki/Colour_banding You can see some slight shifts even at 24-bit depth, if side-by-side. It produces a faint-but-visible banding. Here’s an example (suggesting use of dithering to obscure it): https://sean.cm/a/how-to-fix-banding-in-gradients
that’s how.
one of the 3 LEDs can have 256 levels of brightness (off included)
take that to the power of three, and you have 16 million colours.
but no mortal can actually tell the difference between 255, 255, 255 and 255, 254, 255.
Yeah, essentially the same sourcery behind every pixel of any modern display. The bulb is one pixel.
So… Wait… Does this mean thousands of Hue bulbs can be a display screen? Has this been done?
those really huge displays are often millions of individual RGB LEDs. it would just be a software nightmare to do with hue bulbs.
If they were hardwired yes, but zigbee with millions of bulbs?
I’m guessing you’d hit interference at some point.
But also latency would be bad and you almost definitely couldn’t synchronize them well.
Yeah, I’ve done something similar with ~120 wifi bulbs for a light show that responded to music and that worked fairly well but I doubt it would have worked with more than a few hundred.
Maybe YOU can’t, but don’t speak for the rest of us 😤
Next you’re going to tell me the human eye is capable of differentiating fps above 30
And a 4K TV with 10-bit HDR support can show
(2^10 )^3 × 3840 × 2160 = 8,906,044,184,985,600
different images.
https://en.wikipedia.org/wiki/Colour_banding
You can see some slight shifts even at 24-bit depth, if side-by-side. It produces a faint-but-visible banding.
Here’s an example (suggesting use of dithering to obscure it):
https://sean.cm/a/how-to-fix-banding-in-gradients