try convert infile.pdf -colorspace Gray outfile.pdf
or convert infile.pdf -type Grayscale outfile.pdf Is your infile.pdf in RGB or CMYK?
Hi, I'm using ImageMagick 6.2.5 on Linux and running convert -colorspace GRAY infile.pdf outfile.pdf where my input PDF is fairly large (~4.5MB) and is poster size: 46" x 72". I'm trying to convert the input PDF to a grayscale PDF. The problem is, though the output PDF has the same dimensions, it looks like it is the result of "zooming in" on a portion of the input. Can anyone suggest what I'm doing wrong? Thanks!
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