[Bash] ps2png: convert ps to png format with high quality

previous solution using ImageMagicK works too, but may not produce the high quality expected.

#!/bin/bash # convert a single-page ps file into png format using gs # usage: #            ps2png psfile.ps # Note: #           1: need gs installed #           2: same name is used for the png file #           http://scriptdemo.blogspot.com if [ $# == 0 ]; then    sed -n '2,4p' `which ps2png`    exit else   for psname in $*   do      if [ -e $psname ]; then         pngname=`echo ${psname%%.*}`           gs -r300 -dTextAlphaBits=4 -sDEVICE=png16m -sOutputFile=${pngname}.png -dBATCH -dNOPAUSE ${psname}      else         echo "${psname} does not exist!"      fi   done fi

[Bash] extract pages from a pdf file using gs

#!/bin/bash # extract pages from a big pdf file using gs # Usage: #           pdfselect.sh pdffile startPageNumber endPageNumber #           http://scriptdemo.blogspot.ca function getPDFPages() {    if [ -e $1 ]; then       pdfinfo $1 | grep "Pages" | awk '{print $2}'    else       echo 0;    fi } if [ $# -lt 2 ]; then    sed -n '3,4p' `which pdfselect.sh`    exit fi oriPdf=$1 [ ! -e ${oriPdf} ] && echo "${oriPdf} does not exist! " && exit numPage=`getPDFPages ${oriPdf}` [ ${numPage} -eq 0 ] && "ZERO page is found in ${oriPdf}" && exit sPage=$2 [ ${sPage} -gt ${numPage} ] && ${sPage}=${numPage} if [ $# -eq 2 ]; then    ePage=${sPage} else    ePage=$3; fi [ ${ePage} -gt ${numPage} ] && ${ePage}=${numPage} if [ $# -lt 4 ]; then    outPdf="p${sPage}_${ePage}_${oriPdf}" else    outPdf=$4 fi eval "gs -sDEVICE=pdfwrite -dNOPAUSE -dBATCH -dSAFER -dFirstPage=${sPage} -dLastPage=${ePage} -sOutputFile=${outPdf} ${oriPdf}"

Reduce pdf file size using gs

#!/bin/bash # From http://scriptdemo.blogspot.com # to reduce pdf file size using gs with different optimization level # Usage: # pdfsmaller.sh in.pdf out.pdf [opt] # option: #            screen    (72dpi) #            ebook     (150dpi) #            printer    (300dpi) #            prepress (color preserving, 300dpi) # e.g., #            pdfsmaller.sh Big.pdf smaller.pdf ebook # save output to smaller.pdf # or        pdfsmaller.sh Big.pdf ebook                  # overwrite original Big.pdf # ref: http://milan.kupcevic.net/ghostscript-ps-pdf isOverWrite=0 if [ $# -eq 1 ]; then    inFile=$1    outFile=smaller_$1    opt="prepress"    isOverWrite=1 elif [ $# -eq 2 ]; then    inFile=$1    nf=`echo $2 | awk -F. '{print NF}'`    if [ ${nf} -eq 2 ]; then       outFile=$2       opt="prepress"    else       outFile=smaller_$1       opt=$2       isOverWrite=1    fi elif [ $# -eq 3 ]; then    inFile=$1    outFile=$2    opt=$3 else    sed -n '2,12p' pdfsmaller.sh    exit fi if [ ! -e "${inFile}" ]; then    echo "${inFile} not exist"    echo "gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/${opt} -dNOPAUSE \                   -dQUIET -dBATCH -sOutputFile=\"${outFile}\" \"${inFile}\""    exit else    eval "gs -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/${opt} -dNOPAUSE  \                  -dQUIET -dBATCH -sOutputFile=\"${outFile}\" \"${inFile}\"" fi [ ${isOverWrite} -eq 1 ] && mv "${outFile}" "${inFile}"