Possible Duplicate:
Image background transparent GIMP
I've a jpeg image. i'd like to make it more transparent as i'm using it in my android app as a background. It will have textview in front of it and the image's colours can clash with text in the views.
How can i increase transparency using GIMP?
A JPEG image can not support an alpha channel (transparency) and so you would need to use a file format that can. My recommendation would be .PNG