pdf-resample

A script to use imagemagick to resample a given PDF.

Installation

Make sure both exiftool and ImageMagick are installed and callable from the command line.

Also make sure Racket is installed, and that racket is in your PATH.

Place the script in any location callable from your PATH. If necessary, modify the default locations for exiftool and convert.

Usage

pdf-resample.rkt [ <option> ... ] <infile> <outfile>
  uses imagemagick to resample a given PDF <infile> into PDF <outfile>

 where <option> is one of

 basic flags
  --preserve, -p : Preserve temporary files

 customization arguments
  --resolution <num>, -r <num> : density of the resulting images
    default: 150
  --depth <num>, -d <num> : depth of the resulting images
    default: 2
  --exiftool <path>, -e <path> : path to `exiftool`
    default: /usr/local/bin/exiftool
  --convert <path>, -c <path> : path to `convert`
    default: /usr/local/bin/convert
    
 color-control options
/ --rgb : RGB colorspace (default)
| --bw : Black and white (overrides depth setting)
\ --gray : Gray colorspace

  --help, -h : Show this help
  -- : Do not treat any remaining argument as a switch (at this level)
 /|\ Brackets indicate mutually exclusive options.
 Multiple single-letter switches can be combined after one `-'; for
  example: `-h-' is the same as `-h --'

 This tool is useful for the following:
 * proper redaction of text PDFs
 * changing the filesize of over-sized image PDFs

 Remember to increase the resolution (to 200 or higher) for OCR.