RE: Re: xPLRioNet - A Challenge

["Tony Tofts" <tony@xxxxxxxxxx>]

Hi Gary,

Lame has to be in the <rio install folder>\helpers folder

There is a helpers package on the website that has all the required stuff

Regards
Tony

> -----Original Message-----
> From: Doc_in_texas [mailto:doc_in_texas@xxxxxxx]
> Sent: 21 January 2005 21:56
> To: ukha_xpl@xxxxxxx
> Subject: [ukha_xpl] Re: xPLRioNet - A Challenge
>
>
> Try converting the RGB to 8bit greyscale. Now you only have
> 256 values to worry about. Then it becomes a matter of which
> contrast looks better on the dinky little DAR LCD. Anything
> above your contrast point becomes white, below is black. I
> don't recall a RGB to greyscale algorythm but you should be
> able to google one.
>
> A day or so ago you sent me the transcode.xml line to pipe
> through lame. It didn't work for me but it's possible I
> didn't have lame installed correctly. I moved LAME.EXE and
> LAME_enc.dll from another PC to the WINNT directory. Anyway,
> after adding the line, the DAR would hang in "initializing"
> limbo. I removed the line and all is well.
>
> Gary
>
>
> --- In ukha_xpl@xxxxxxx, "Tony Tofts" <tony@x> wrote:
> > Hi all,
> >
> > While coding up routines to handle the riot display for the Rio
in
> xplrionet
> > I thought it would be a bit of fun to include the ability to
render
> an image
> > onto the rio's screen...
> >
> > I'm currently looking at a Rio which is displaying an Album cover
;-
> )
> >
> > Problem is the conversion from colour bitmap to pure black and
> white (not
> > grey scale) isn't great.
> >
> > 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?
> >
> > Many thanks
> > Tony
>
>
>
>
>
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> http://www.xpl.myby.co.uk
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