--no-exact-color, --exact-color
Disables the GhostScript's exact color matching mechanism which pdftodjvu uses by default. In rare cases, this mechanism produces erroneous results. In general there will be a modest performance gain using this switch.
Example
pdftodjvu
--no-exact-color document.ps document.djvu
This is the default behavior. For backwards-compatibility, this option is still supported but has no effect. Its use is discouraged.