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#!/bin/bash
# Make a PDF look scanned.
# Extracted from https://github.com/baicunko/scanyourpdf and modified for smaller output files (compression lower density).
INPUT_FILE=$1
/usr/local/bin/convert -density '80' ${INPUT_FILE} -colorspace 'gray' -linear-stretch '3.5%x10%' \
-blur '0x0.5' -attenuate '0.25' +noise Gaussian -rotate 0.5 \
-compress lzw -quality 50 scanned_${INPUT_FILE}