png2eps: convert png image to eps with high resolution

#!/bin/bash # convert a png file into eps file # Usage: #           png2eps pngfile.png [-q JPGQuality -r FigResizePercentage] # e.g., #           png2eps aa.png bb.png -q 100 -r 60 # http://scriptdemo.blogspot.com if [ $# == 0 ]; then    sed -n '3,6p' png2eps    exit fi JPGQuality='100' FileResize='80' nfile=0 while test -n "$1" do   case "$1" in     -q|-quality)        JPGQuality=$2        shift        ;;     -r|-resize)        FileResize=$2        shift        ;;     *)        if [ -e $1 ]; then           pngfiles[$nfile]=$1           nfile=`expr $nfile + 1`        fi        shift        ;;   esac done for pngfile in ${pngfiles[*]} do   #convert to jpg file first to keep high resolution   jpgfile=${pngfile%%.*}.jpg   epsfile=${pngfile%%.*}.eps   eval "convert -quality ${JPGQuality} -resize ${FileResize}% ${pngfile} ${jpgfile}"   [ -e ${epsfile} ] && epsfile=tmp_${epsfile}   eval "convert ${jpgfile} eps3:${epsfile} && rm -f ${jpgfile}" done

Another solution is to use png2pnm and pnm2ps commands:

#!/bin/bash # convert a png file into eps file [using pngtopnm, pnmtops] # Usage: #           png2eps2 pngfile.png -scale reScale [-o outfile.eps] # e.g., #           png2eps2 aa.png -scale 0.3 -o aa.eps # http://scriptdemo.blogspot.com if [ $# == 0 ]; then    sed -n '3,6p' png2eps2    exit fi reScale='0.3' nfile=0 while test -n "$1" do   case "$1" in     -s|-r|-scale|-rescale)        reScale=$2        shift        ;;     -o|-output)        epsfile=$2        shift        ;;     *)        if [ -e $1 ]; then           pngfiles[$nfile]=$1           nfile=`expr $nfile + 1`        fi        shift        ;;   esac done for pngfile in ${pngfiles[*]} do   #convert to jpg file first and resize   [ ! -n "$epsfile" ] && epsfile=${pngfile%%.*}.eps   [ $nfile -gt 1 ] && epsfile=${pngfile%%.*}.eps   [ -e ${epsfile} ] && epsfile=tmp_${epsfile}   eval "pngtopnm ${pngfile} | pnmtops -noturn -nocenter -scale ${reScale} - >${epsfile}"   eps2eps -dLanguageLevel=3 ${epsfile} thisTmp${epsfile} && mv thisTmp${epsfile} ${epsfile} done