Re: xPLRioNet - A Challenge

["Keith Doxey" <ukha@xxxxxxxxxxx>]

--- In ukha_xpl@xxxxxxx, "Tony Tofts" <tony@x> wrote:

> I'm currently taking a pass thru the bitmap, taking an average of
the RGB
> per pixel, and then an overall average.
>
> Then when rendering if the total of rgb < than the average it's
black, else
> it's white.
>
> But I think it could be a lot better. I believe you have to do
stuff like
> giving each RGB part a different weighting?
>
> So the challenge is... Can someone find a (not too complicated)
formula to
> give a decent image please?
>

Hi Tony,

Most of the brightness of a picture is in the GREEN component.

PaintShopPro gives 4 options when reducing to two colours allowing
you to select between Grey/Red/Green/Blue component of the original
image.

I tried this and you can see the results at
http://www.diyha.co.uk/xpl/index.html

Regards

Keith





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