convert image.bmp image.pngswidnikk wrote:I can't seem to figure this out (been experimenting with some of the examples at http://www.imagemagick.org/Usage/channels/#extract)
I have 32bit(RGBA) BMP images and need to convert those to PNG while preserving the alpha information (for display on the web).
Can anyone point me in the right direction?
I've been trying things like the following with no success...Code: Select all
convert image.bmp -alpha extract image_extract.png
should do it, but if not try
convert image.bmp -channel rgba -alpha on image.png
Post a link to your image, if this does not work. Perhaps your image is not what you think. You can check its characteristics by
identify -verbose image.bmp
and check if the alpha channel exists