Legacy ImageMagick Discussions Archive

OK, thanks.

I've now worked around the problem, converting the input file to ASCII PBM, then (using Perl) manipulating the pixels directly. It was not too difficult, and runs quickly enough.

Here's the original file:
https://www.dropbox.com/s/42fmltp72fhiski/original.png

The 32-bit output:
https://www.dropbox.com/s/gsrz4uecmgz225g/i386-1.png

The 64-bit output:
https://www.dropbox.com/s/nl6d60ike234mew/amd64-1.png

I can't find a way to upload sample images here, but the problem is fairly simple, so here goes. I have a two-colour image consisting of black characters on a white background, and I want to convert it so that I get black character edges on a white background, or vice versa. So I run the command ...