tiff2pdf.sh

for i in *
  do
       echo "processing $i ======="
       echo "creating pdfs for"
       find "$i" -maxdepth 1 -name "*.tif" | xargs -i -n 1 -P 6 convert -density 200x200 -compress jpeg -quality 80 "{}" "{}".pdf
       echo "compressing pdfs"
       find "$i" -maxdepth 1 -name "*.tif.pdf" | xargs -i -n 1 -P 5 gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -dNOPAUSE -dQUIET -dBATCH -sOutputFile={}_out.pdf {}
       cd "$i"
       echo "concatinating pdfs"
       pdftk *_out.pdf cat output temp.pdf
       echo "linerizing pdf"
       qpdf --linearize temp.pdf $i.pdf

       rm *.tif.pdf
       rm *_out.pdf
       rm temp.pdf
       mkdir 01_tif
       mv *.tif 01_tif
       mkdir 02_pdf
       mv "$i".pdf 02_pdf
       cd ..
       
       
       echo "finding all tif files"
       find -name "*.tif" -exec identify {} \; > stats.txt
       
       #removing compression on non-bitonal images
       echo "removing compression on non-bitonal images"
       cat stats.txt | awk -F" TIFF" '{ print $1 }' | xargs -i -n1 -P5 mogrify +compress
       
       #compress bitonal files
       echo "compressing bitonal images"
       grep "1-bit" stats.txt | awk -F" TIFF" '{ print $1 }' | xargs -i -n1 -P5 mogrify -compress Group4 {}
       
       rm stats.txt
   done