[android-developers] Re: PNG Color Issue
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 > > 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 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 > romain...@android.com > > 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 > > > > --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: PNG Color Issue
Dear Romain Guy, I had tried to make a pre-dithering image by Photoshop tools "save for web and device" and specify "PNG-8 128 Dithered" to my image, but it still didn't work. Can you show me the guideline how to make a proper image by Photoshop for Android?? Thank you very much! On 5月20日, 上午4時34分, Romain Guy wrote: > 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 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=dire... > > > And the following two links were the original png files: > > >http://picasaweb.google.com/lh/photo/WJahLJ7uMRk2dA9GhYjs-Q?feat=dire... > >http://picasaweb.google.com/lh/photo/0ddqAeWxd957SAVelwu_jA?feat=dire... > > > 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 > romain...@android.com > > 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 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
[android-developers] Re: PNG Color Issue
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 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 romain...@android.com 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 --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~--~~~~--~~--~--~---
