RE: Blurred shadow without banding

Hi Jerry,

You need to produce your graphics in 16k mode to get the shading then use an
optimized median cut employing *nearest color* when reducing to 256 colors.
You won't get any shading using websafe colors because websafe colors won't
dither.

Note too that almost any shaded (graduated) graphic will look bad in 256
color mode (note *mode* as in windows, not 256 col graphics).

HTH

Marty

> -----Original Message-----
> From: owner-hwg-graphics(at)hwg.org [mailto:owner-hwg-graphics(at)hwg.org]On
> Behalf Of Dr. Jerry M. Obaldo
> Sent: Tuesday, April 06, 1999 6:17 AM
> To: hwg-graphics(at)hwg.org
> Subject: Blurred shadow without banding
>
>
> Hi!  I need to produce graphics (logos, text)
> with a grey shadow.  The shadow has to be blurred.
> My problem is when I reduce the number of colors
> to make it a GIF file the shadows show bands or
> when I dither it they come out spotted.
>
> I've seen some GIF graphics on the web where the
> grey shadows appear smoothly blurred.  The only
> example that comes to mind right now however is
> the AOL instant messenger logo.
> Again the graphic needs to be a GIF not JPEG.
> I have experimented with the web-safe grey
> colors and different blurring levels but no luck.
>
> TIA
> Jerry
>

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