pdftops how to generate monochrome PostScript file

Submitted by Gaurav

Assigned to poppler-bugs

What should be input options for pdftops to generate a Monochrome PostScript file from PDF having color images and color text.

I could not find anything related to converting Color pdf to mono PS in PSOutputDev and pdftops.

Please let me know input options for pdftops for generating mono ps.

Please include functionality if not already present.

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