This is a little complicated, but bear with me:

1: Desaturate the image (make greyscale while staying in RGB space)
2: Invert the image
3: Copy the image
4: Bring up layers dialogue
5: Add a layer and fill it with red
6: Add a mask to this layer
7: Paste into the mask
8: Apply the mask

That should do it.  If you want to save it as a transparent image
(i.e. kill the background), use .png format as .gif only supports
one alpha bit. Note that not all web browsers support 8 bit alpha
alpha Mozilla and IE do if I recall correctly.

Reply via email to