RE: [Algorithms] 256 colour palette

[Matthew D. <MD...@ac...>]

Hi,

Sorry, I may have not been clear.

I don't need to convert a 24-bit image to 256 colours using quantisation.  I
need to have a consistent single palette which doesn't restrict me too much
to the colours I can have in my textures.  For example, DOOM used a 256
colour palette to display all its graphics.

One idea is to have 32 different colours and 8 shades of them.  I could
design my textures in those 32 colours and 32 of a darker shade.

But I just wondered if anyone had a generic palette that they knew worked
well.

Best regards,
Matt.

> -----Original Message-----
> From: Tom Nettleship [mailto:to...@ar...]
> Sent: Wednesday, August 30, 2000 10:47
> To: 'gda...@li...'
> Subject: RE: [Algorithms] 256 colour palette
> 
> 
> The problem you're referring to is commonly called quantization. Doing
> a web search on that might glean some results.
> 
> The two main algorithms people often use are called 'Median Cut' and
> 'Octree Quantization'. Both of these are efficient, and produce good
> results.
> 
> Get hold of a copy of Graphics Gems 1... this has a paper describing
> how to implement Octree Quantization, and also (i think) source code,
> though there may be some bugs in it.
> 
> Tom Nettleship
> 
> P.S. I turned this mail into plain text from the HTML you 
> sent... please
> don't
> send HTML posts to mailing lists; people using some mail readers can't
> decipher
> them.
> 
> > From: Matthew Davies [mailto:MD...@ac...]
> > 
> > Hi,
> > 
> > Can any of you guys give me some hints on choosing a decent 
> 256 colour
> > palette so that I can get a nice > spread of colours.  I 
> need it for a
> simple
> > 3d game so basically I need to cover common colours and 
> shades thereof.  
> >  
> > Do any of you have experience in this area.  I've had it so 
> easy with
> 24-bit graphics up until now!  :-)
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