On Tue, Dec 24, 2002 at 11:31:45PM -0800, Eric Pierce wrote:

I've wondered for years if there's any way to perfectly strip an image from a solid colored background while maintaining any alpha channel info.

Take this image for instance. http://epierce.freeshell.org/temp/index.html

The background is 100% white. But there's some definate blending going on with the image border and with the image shadow.

Have a look at this tutorial which describes what you want to do:

http://www.gimp.org/~sjburges/color_to_alpha/demo/color2alpha.html

Cheers, Malcolm

Eric Pierce wrote:

I've wondered for years if there's any way to perfectly strip an image from a solid colored background while maintaining any alpha channel info.

Take this image for instance. http://epierce.freeshell.org/temp/index.html

The background is 100% white. But there's some definate blending going on with the image border and with the image shadow.

I played a bit with a layer of white using the different layer modes thinking one of them might cancel out the white effectively stripping out only the white, but to no avail.

Anyway, this isn't pressing... just picking at my brain for some time.

Thanks for any ideas! Eric P.

Well, you could use the "Colors/Color to Alpha Channel" filter to remove the white, but that will remove TOOO much. The way I would do it would be to use the "magic wand" (Select continuous regions tool) to select the continuous regions of the background color and then use "Edit/Clear" to remove them.

Peace....

Tom