4 ms·
If all you need to do is create a negative version of pre-existing image, you can use ImageMagick on the command line: $ converge in.png -negate out.png
by neilh23 9y ago
If all you need to do is create a negative version of pre-existing image, you can use ImageMagick on the command line:
$ converge in.png -negate out.png