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Similarly to this question:
I have a PDF-document and want to convert it to pure black and white. So I want to discard halftones. To convert to grayscale with ghostscript I can use this command:
gs \
-sOutputFile=output.PDF \
-sDEVICE=pdfwrite \
-sColorConversionStrategy=Gray \
-dProcessColorModel=/DeviceGray \
-dCompatibilityLevel=1.4 \
input.PDF < /dev/null
What do I have to change to get monochrome e.g. only the colors black and white and no halftones?
I tried this and was still left with shades of gray. niklasfi wants monochrome. – frabjous – 2011-01-23T15:57:37.630