Ive <ive### [at] lilysoftorg> wrote:
> Am 21.03.2011 16:25, schrieb Trevor G Quayle:
> >> Alternatively, you can convert the HDR or EXR output using Ive's "IC"
> >> ("Image Converter", see http://www.lilysoft.org/IC/ic_index.htm), which
> >> does a much better job at avoiding color banding than most other image
> >> manipulation/conversion software.
> >
> > I tried the converter, the banding is still there.
>
> Hum? Actually I can't believe that but it might be my own fault as I
> never managed it to write a decent documentation.
> In case you use IC for converting some HDR format to PNG it will store
> the PNG in 16bps format (to avoid unnecessary loss of information) and
> the banding will be introduced again when you use other viewing software.
> So you have to reduce the color depth before you actually save the image
> file by using the menu item
> Image -> Mode -> RGB 8bps
> - and make sure within the Options menu that dithering is actually enabled.
>
> -Ive

Maybe a little RTFM on my part...

I do get it to work now.  The problem was I didn't set to 8bit, but also I was
saving direct to jpg.  I assume then that the dithering doesn't apply to jpg
saving?


-tgq

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