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Groups > comp.lang.c > #150933
| From | Eli the Bearded <*@eli.users.panix.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: [offtopic][retro] 16 color palette definition |
| Date | 2020-03-31 18:56 +0000 |
| Organization | Some absurd concept |
| Message-ID | <eli$2003311456@qaz.wtf> (permalink) |
| References | <25df9d14-a1ff-4dd0-bad1-a8b60a430d1a@googlegroups.com> <2ce706bf-81e6-4782-b2bc-9be16a5d1574@googlegroups.com> <C7KfG.182215$_3E.157994@fx15.am4> <V1qgG.311950$_3E.279744@fx15.am4> |
In comp.lang.c, Bart <bc@freeuk.com> wrote: > If stuck with 4 bits, and able to use a palette, then there is no clear > way of using RGB, as you use 1 bit for each of R, G, B, but then what > purpose is the 4th bit? Wasn't it traditionally a brightness? R G B br -> modern RGB 0 0 0 0 -> 000000 0 0 0 1 -> 505050 1 1 1 0 -> A0A0A0 1 1 1 1 -> FFFFFF 1 0 0 0 -> 800000 1 0 0 1 -> FF0000 0 1 0 0 -> 008000 0 1 0 1 -> 00FF00 0 0 1 0 -> 000080 0 0 1 1 -> 0000FF (etc) But I wouldn't call that a "palette". To me that term is when your color is an index into a lookup table, not an attempt to make each bit meaningful. > So I think it might be worth looking at using CMYK instead. C,M,Y,K are > used in printing, as either on or off. So such 4-bit colour pixels could > be used to show photos, given enough pixels and using dithering or > half-tone patterns. I think using CMYK for screens, and 4 bit CMYK at that, is foolish. Too many colors in the CMYK space have redundant representations and it's not a close match for display hardware. There are technical reasons due to ink opacity and drying time to choose between 30% K or 50% K which make no sense for a photon driven output. Elijah ------ four bit RGBA to blend with a background color may make sense, too
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[offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 03:54 -0700
Re: [offtopic][retro] 16 color palette definition felix@palmen-it.de (Felix Palmen) - 2020-03-28 12:11 +0100
Re: [offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 05:45 -0700
Re: [offtopic][retro] 16 color palette definition felix@palmen-it.de (Felix Palmen) - 2020-03-28 15:41 +0100
Re: [offtopic][retro] 16 color palette definition BGB <cr88192@gmail.com> - 2020-03-30 08:05 -0500
Re: [offtopic][retro] 16 color palette definition felix@palmen-it.de (Felix Palmen) - 2020-03-30 17:43 +0200
Re: [offtopic][retro] 16 color palette definition BGB <cr88192@gmail.com> - 2020-03-30 12:04 -0500
Re: [offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 04:16 -0700
Re: [offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 05:32 -0700
Re: [offtopic][retro] 16 color palette definition bert <bert.hutchings@btinternet.com> - 2020-03-28 07:05 -0700
Re: [offtopic][retro] 16 color palette definition Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-03-28 08:13 -0700
Re: [offtopic][retro] 16 color palette definition Bart <bc@freeuk.com> - 2020-03-28 15:33 +0000
Re: [offtopic][retro] 16 color palette definition Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-03-28 08:40 -0700
Re: [offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 08:58 -0700
Re: [offtopic][retro] 16 color palette definition Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-03-28 09:08 -0700
Re: [offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 09:31 -0700
Re: [offtopic][retro] 16 color palette definition Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-03-28 10:51 -0700
Re: [offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 11:03 -0700
Re: [offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 11:10 -0700
Re: [offtopic][retro] 16 color palette definition Bart <bc@freeuk.com> - 2020-03-30 18:31 +0100
Re: [offtopic][retro] 16 color palette definition Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-03-30 11:26 -0700
Re: [offtopic][retro] 16 color palette definition Bart <bc@freeuk.com> - 2020-03-30 21:09 +0100
Re: [offtopic][retro] 16 color palette definition BGB <cr88192@gmail.com> - 2020-03-30 13:45 -0500
Re: [offtopic][retro] 16 color palette definition Eli the Bearded <*@eli.users.panix.com> - 2020-03-31 18:56 +0000
Re: [offtopic][retro] 16 color palette definition Bart <bc@freeuk.com> - 2020-03-31 20:32 +0100
Re: [offtopic][retro] 16 color palette definition Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2020-03-31 13:51 -0700
Re: [offtopic][retro] 16 color palette definition BGB <cr88192@gmail.com> - 2020-03-29 22:40 -0500
Re: [offtopic][retro] 16 color palette definition Bonita Montero <Bonita.Montero@gmail.com> - 2020-03-28 16:09 +0100
Re: [offtopic][retro] 16 color palette definition Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2020-03-28 14:10 -0400
Re: [offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 11:59 -0700
Re: [offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 12:02 -0700
Re: [offtopic][retro] 16 color palette definition fir <profesor.fir@gmail.com> - 2020-03-28 12:49 -0700
Re: [offtopic][retro] 16 color palette definition Jorgen Grahn <grahn+nntp@snipabacken.se> - 2020-03-28 20:57 +0000
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