[willus]

Originally Posted by mike.foster

Thanks for looking into it.

Here are temporary links to the attachment
- Original pdf (444kb)
- Preview's black & white filter (958kb)
- Fine tune's (58kb)
- k2opt / -cmax 2 -s -g 0.1 -wt -1 -mode tm (444kb)

Mike -- Try the command below. You can tinker with the values for -g and -cmax if you want (use a negative value for -cmax to force the contrast setting to that value). It's good to put -mode tm first--it sets a bunch of options internally, so then everything that comes after it can modify those options. Most importantly, though, the -mode tm command kicks k2pdfopt into "native output" mode, where it doesn't make use of contrast adjust, gamma correction, or sharpening, so your result did not actually use these. To fix this, you need to put -n- after -mode tm to turn that off. I then set the output dpi to 200 to match your source document. You don't need to specify -s since it's on by default. I've attached my result.

k2pdfopt -mode tm -odpi 200 -n- -g 0.4 -cmax 3 page22.pdf