pouët.net

72bit color mode

category: general [glöplog]
hi.

i've read through this thread http://www.pouet.net/topic.php?which=522 and read about how they've used hardware to show more colors on screen.

i a wondering why this isn't used by anybody for displaying ... errr raytraced higher-than-higher 72bit (RGB*3, no alpha) color images in 640x480 (1280x960 halfed) ... *gg*
added on the 2006-11-24 12:39:23 by doc^21o6 doc^21o6
go away
added on the 2006-11-24 13:03:12 by toxie toxie
Because the actual "color depth" you could achieve that way is 30bit, not 72. Hardly worth the effort.

And now go away.
added on the 2006-11-24 13:12:27 by kb_ kb_
lol
added on the 2006-11-24 14:09:53 by EviL EviL
How about some 1 colour mode? With this you can fake 2 colours with one pixel, or 2 pixels with one colour, or 2 pixels with 2 colours...or...umm

go away
added on the 2006-11-24 14:12:17 by Exin Exin
HDR FTW!
added on the 2006-11-24 14:28:47 by xeron xeron
Your eyes have more bit depth than my eyes.
Yeah! Go away!
added on the 2006-11-24 15:03:06 by xernobyl xernobyl
8 bits should be enough for everyone.
Go away!
added on the 2006-11-24 15:04:57 by shadez shadez
interlacing experiments in textmode failed.

so go away!
Quote:
interlacing experiments in textmode failed.

so go away!

Speaking of interlaced and text mode... These things happened to me today.

BB Image
BB Image

Sooo... Now go away!
added on the 2006-11-24 16:50:48 by nitro2k01 nitro2k01
The "störigt TV pip" is the horizontal retrace at exactly 15625Hz (50 fields/sec à 312.5 lines).

Just so you, uh, go away.
added on the 2006-11-24 17:17:06 by kb_ kb_
oh stfu everybody, i was serious ... but in a hurry.

i can remember some code from the old DOS days in VESA in 640x480x8bpp was using 3 pixels (in a triangle, facing downwards) to simulate a bigger pixel for a greater colordepth by halfing resolution (leaving one pixel black or using it for "brightness" or something, can't remember).
forget the interlacing part, as said i was in a hurry and mixed something up, i've watched second reality a few days ago and it shows (afaik) a fake 512-color mode (the smoke effect) ...

i knew that it was a stupid question and it's not actually making me look smart (at least i'm not the only one here with that problem :D), but i don't grasp why that shouldn't work (which means i have to try it out myself). only 30bit? how comes?

added on the 2006-11-24 17:58:56 by doc^21o6 doc^21o6
Don't worry, use shadetables.

Now go away.
added on the 2006-11-24 17:59:44 by StingRay StingRay
There is no place on this website for people who are more stupid than me.

Now go away.
added on the 2006-11-24 18:19:35 by chameleon chameleon
kb_: Yes I know, but I was too lazy to google up the exact numbers.

Now go away.
added on the 2006-11-24 18:23:33 by nitro2k01 nitro2k01
blah blah blah blah.

Now piss off.
added on the 2006-11-24 20:16:03 by xeron xeron
I did read somewhere that LCD monitors were not able to display those 24 bits of RGB colors anyway?
added on the 2006-11-24 20:29:53 by _-_-__ _-_-__
Some cheapy LCD monitors used to use something like 18 bit colour, but feature dithering routines to simulate more. If I remember correctly, they were usually listed as being capable of approximating 2.1 million colours, or whatever...

Isn't there a limit for how many colors the human eye can see and doesn't it go there around 24 bits? Thus working your ass of to show 72 bit graphics is kinda useless since noone will be able to apreciate it.

xernobyl hinted at this above but I pretend I didn't read that...
added on the 2006-11-24 20:55:50 by El Topo El Topo
72-bit graphics huh? you're dreamin' kiddo.

Now go away.
added on the 2006-11-24 21:07:21 by decipher decipher
if human visual system has 24bit linear color resolution, using a 72bit linear color palette for display will reduce maximum perception error rate from 50% to 12.5%. but neither hsv nor display devices are linear so it doesn't matter.

now go away at once!
hvs that is.

it's your fault, fuck off!
and it was 6.25% instead of 12.5%.

who to blame now?
ok it is 0.5 / 2^48. i failed miserably. it's time for me to go away.
@anes: science sans conscience sucks :P

Now go away.
added on the 2006-11-24 21:33:40 by decipher decipher

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