Re: Re: Color depth - Wikipedia, the free

• To: mathgroup at smc.vnet.net
• Subject: [mg105287] Re: [mg105231] Re: [mg105150] Color depth - Wikipedia, the free
• From: DrMajorBob <btreat1 at austin.rr.com>
• Date: Wed, 25 Nov 2009 23:04:19 -0500 (EST)
• References: <200911221111.GAA10588@smc.vnet.net>

```> every pixel has different rgb-values. This means if you put n=16^2 you
> would have 256x256x256 colors...

No... it means you'd have RGBColor with 256x256x256 distinct parameter
triplets. That doesn't prove they're all distinct, implemented COLORS.

We could set n=1024^2 just as easily, but is there an implemented color
model (in Mathematica) with the required depth?

Bobby

On Wed, 25 Nov 2009 01:31:41 -0600, Patrick Scheibe
<pscheibe at trm.uni-leipzig.de> wrote:

> Hi,
>
> assume the following graphic in Mathematica
>
> With[{n = 4^2},
>   ArrayFlatten[
>    Partition[
>     Table[{x, y, z}, {z, 0, 1, 1/(n - 1)}, {y, 0, 1, 1/(n - 1)}, {x,
>       0, 1, 1/(n - 1)}], Sqrt[n]]]] //
>  ArrayPlot[#, ColorFunction -> RGBColor] &
>
> when you check the values for the colors in this image you'll see that
> every pixel has different rgb-values. This means if you put n=16^2 you
> would have 256x256x256 colors in the image which is exactly what
> "millions of colors" is supposed to be.
> Since the table creates rational expressions for the {r,g,b} colors you
> could easily (with the restriction that an image of that size would take
> too long to render in Mathematica) create more colors by setting higher
> values to n.
>
> But what does this mean? Are there really that many visible colors on
> your screen? What happens if you export the image?
> This depends many things, e.g. on your os-settings.
>
> So if you really want to know more, you have to tell more about what you
> try to achieve and which things are not working for you.
>
> Cheers
> Patrick
>
>
>
>
>
> On Sun, 2009-11-22 at 06:11 -0500, Roger Bagula wrote:
>> http://en.wikipedia.org/wiki/Color_depth
>>
>> Does anyone know how to access thousand and millions of
>> colors in Mathematica?
>>
>> Respectfully, Roger L. Bagula
>> 11759 Waterhill Road, Lakeside,Ca 92040-2905,tel: 619-5610814 :
>> alternative email: roger.bagula at gmail.com
>>
>>
>>
>
>

--
DrMajorBob at yahoo.com

```

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