shell-tools.sh

# # # # # # # # # # # # # 
#       PDF Tools
# # # # # # # # # # # # #
# Uses Imagemagick convert tool

# Reduce PDF file size by compressing images to 200dpi, jpeg quality 80
convert -density 200x200 -quality 80 -compress jpeg input.pdf output.pdf

# Apply contrast normalization to scanned PDF files
# darkest 3% of pixels will be black, brightest 2% white
convert -contrast-stretch 3%x2% input.pdf output.pdf