--negate

The --negate flag allows TwainSave to save pages as negatives or reverse coloring of the original image. The outcome of using the --negate option is that black or dark colors become light, and white or light colors become dark.

This option can also be used for devices that erroneously create negative images (usually this is the case for buggy TWAIN devices when used with the --noui option). If without using --negate, the images are reversed in colors, use the --negate option to set the colors correctly.

Default Setting:

If --negate is not specified, the images are not reverse colored.