Do you mean "add noise" to the images?

I tried to add 0.5 noise to our image as the widget guide mentioned, but it
only makes the banding looks different.
It's not as good as enabling dither attribute.

I hope I can do "pre-ditering" so that I can save a little CPU power. Can
you advise how to do it correctly?

2009/5/20 Romain Guy <[email protected]>

>
> This happens because Android renders images using a 16 bits color
> depth, which causes banding in your case. You can reduce banding by
> enabling dithering on your drawing or better yet, by pre-dithering the
> image using Photoshop or any graphics editor that can do that.
>
> On Tue, May 19, 2009 at 2:25 AM, Tony Wu <[email protected]> wrote:
> >
> > Once I want to put the pictures in my application, I meet this
> > problem.
> > The color presented by Android device or emulator was different from
> > the original png files.
> > I made a simple application to present the two pictures in one page
> > and I fetch the picture as the following link:
> >
> >
> http://picasaweb.google.com/lh/photo/Rj5L_x_Z1IJGfGLmZV2B7g?feat=directlink
> >
> > And the following two links were the original png files:
> >
> >
> http://picasaweb.google.com/lh/photo/WJahLJ7uMRk2dA9GhYjs-Q?feat=directlink
> >
> http://picasaweb.google.com/lh/photo/0ddqAeWxd957SAVelwu_jA?feat=directlink
> >
> > Can anyone explain it for me why it presented in different color??
> >
> > By the way, the picture was made in 32bit colors png format.
> >
> > Thanks & Regards
> >
> > Tony
> >
> > >
> >
>
>
>
> --
> Romain Guy
> Android framework engineer
> [email protected]
>
> Note: please don't send private questions to me, as I don't have time
> to provide private support.  All such questions should be posted on
> public forums, where I and others can see and answer them
>
> >
>

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