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The table of the 4096 colors of Thomson microcomputers
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Auteur:  zef [ 10 Fév 2019, 19:19 ]
Sujet du message:  The table of the 4096 colors of Thomson microcomputers

I made this table of 4096 colors Thomson microcomputers with relative PALETTE value, you can download it from the following link http://retrohead.appodesign.com/include/images/palette-pc128-cc-giuseppe-stassi.jpg

Auteur:  gilles [ 11 Fév 2019, 09:14 ]
Sujet du message:  Re: The table of the 4096 colors of Thomson microcomputers

great and usefull but a lossless format like png will be better. Here in JPG the image there is 142741 unique colors when importing to gimp (another image software may create a different color count due to different jpg rendering).
Fichier(s) joint(s):
Capture du 2019-02-11 09-11-53.png
Capture du 2019-02-11 09-11-53.png [ 117.5 Kio | Vu 1366 fois ]

Auteur:  zef [ 11 Fév 2019, 19:01 ]
Sujet du message:  Re: The table of the 4096 colors of Thomson microcomputers

from the following link you can download the image in PNG without compression
http://retrohead.appodesign.com/include/images/palette-pc128-cc-giuseppe-stassi.png

Auteur:  gilles [ 12 Fév 2019, 18:06 ]
Sujet du message:  Re: The table of the 4096 colors of Thomson microcomputers

great, png can also be (losslessly) compressed giving a 440Kb file (the color defect is due to jpeg encoding), which level conversion did you take for RGB value? (The original from TEO emulator was taken with 2 CRT/ PC and TV side by side and contrast/lum to default)

Auteur:  Samuel Devulder [ 12 Fév 2019, 21:11 ]
Sujet du message:  Re: The table of the 4096 colors of Thomson microcomputers

One can clearly see now that the Thomson palette is actually very bright. Lots of colors are very similar.

I have once created a regularly spaced palette, the "pertinent" colors reduces from 4096 to something like 512 colors whose difference was at least 12% per component's intensity. To do this, pickup the following indices: 0, 1, 3, 5, 7, 9, 11, 15, this makes a palette of 8x8x8 = 512 regularly spaced colors (approx.)

Auteur:  zef [ 14 Fév 2019, 00:55 ]
Sujet du message:  Re: The table of the 4096 colors of Thomson microcomputers

I'm working on a dynamic palette generation tools, you can see the work in progress from this link:
http://retrohead.appodesign.com/motopalette/
if you have any suggestions let me know...

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