#!/bin/bash # # Developed by Fred Weinhaus 6/10/2017 .......... revised 12/8/2023 # # ------------------------------------------------------------------------------ # # Licensing: # # Copyright © Fred Weinhaus # # My scripts are available free of charge for non-commercial use, ONLY. # # For use of my scripts in commercial (for-profit) environments or # non-free applications, please contact me (Fred Weinhaus) for # licensing arrangements. My email address is fmw at alink dot net. # # If you: 1) redistribute, 2) incorporate any of these scripts into other # free applications or 3) reprogram them in another scripting language, # then you must contact me for permission, especially if the result might # be used in a commercial or for-profit environment. # # My scripts are also subject, in a subordinate manner, to the ImageMagick # license, which can be found at: http://www.imagemagick.org/script/license.php # # ------------------------------------------------------------------------------ # #### # # USAGE: sketchetch [-m mode] [-e etch] [-B brightness] [-S saturation] [-h hue] # [-c color] [-C coloramt] [-t type] [infile] [outfile] # # USAGE: sketchetch [-help] # # OPTIONS: # # -m mode mode for processing; choices are: normal, grayscale, # colorized, shaded and composite; default=normal # -e etch etch amount; integer>0; default=4 # -B brightness brightness percent change; -100<=integer<=100; default=0 # -S saturation saturation percent change; -100<=integer<=100; default=0 # -H hue hue angle change in degrees; -360<=integer<=360; default=0 # -c color colorizing color; any valid opaque IM color is allowed; # default=sienna1 # -C coloramt colorizing amount; 0<=integer<=100; default=50 # -t type type of composite (compose mode); choices are: hardlight, # overlay, and softlight; default=hardlight # ### # # NAME: SKETCHETCH # # PURPOSE: To create an etch-like sketch from an image. # # DESCRIPTION: PIP creates an etch-like sketch from an image. There is an option for # modes of normal, grayscale, colorized grayscale, shaded grayscale and three different # composite types. # # # ARGUMENTS: # # -m mode ... MODE for processing. The choices are: normal, grayscale, colorized # (from grayscale), shaded (from grayscale) and composite. The default=normal. # # -e etch ... ETCH amount. Values are integers>0. The default=4. # # -B brightness ... BRIGHTNESS percent change of the image. Value are -100<=integer<=100. # The default=0. # # -S saturation ... SATURATION percent change of the image. Value are -100<=integer<=100. # The default=0. # # -H hue ... HUE angle change of the image in degrees. Value are -360<=integer<=360. # The default=0. # # -c color ... COLOR is the colorizing color. Any valid opaque IM color is allowed. # The default=sienna1. # # -C coloramt ... COLORAMT is the colorizing amount. Values are 0<=integers<=100. # The default=50. # # -t type ... TYPE of composite (compose mode). The choices are: hardlight, overlay # and softlight. The default=hardlight # # Reference: # http://www.creativecloseup.com/color-ink-sketch-effect-in-photoshop # # CAVEAT: No guarantee that this script will work on all platforms, # nor that trapping of inconsistent parameters is complete and # foolproof. Use At Your Own Risk. # ###### # # set default values mode="normal" # normal, grayscale, colorized (grayscale), shaded (grayscale), composite etch=4 # etch amount brightness=0 # brightness change in percent saturation=0 # saturation change in percent hue=0 # hue change in deg color="sienna1" # colorizing color coloramt=0 # color amount type="hardlight" # compose type; hardlight, overlay, softlight # set directory for temporary files dir="." # suggestions are dir="." or dir="/tmp" # set up functions to report Usage and Usage with Description PROGNAME=`type $0 | awk '{print $3}'` # search for executable on path PROGDIR=`dirname $PROGNAME` # extract directory of program PROGNAME=`basename $PROGNAME` # base name of program usage1() { echo >&2 "" echo >&2 "$PROGNAME:" "$@" sed >&2 -e '1,/^####/d; /^###/g; /^#/!q; s/^#//; s/^ //; 4,$p' "$PROGDIR/$PROGNAME" } usage2() { echo >&2 "" echo >&2 "$PROGNAME:" "$@" sed >&2 -e '1,/^####/d; /^######/g; /^#/!q; s/^#*//; s/^ //; 4,$p' "$PROGDIR/$PROGNAME" } # function to report error messages errMsg() { echo "" echo $1 echo "" usage1 exit 1 } # function to test for minus at start of value of second part of option 1 or 2 checkMinus() { test=`echo "$1" | grep -c '^-.*$'` # returns 1 if match; 0 otherwise [ $test -eq 1 ] && errMsg "$errorMsg" } # test for correct number of arguments and get values if [ $# -eq 0 ] then # help information echo "" usage2 exit 0 elif [ $# -gt 18 ] then errMsg "--- TOO MANY ARGUMENTS WERE PROVIDED ---" else while [ $# -gt 0 ] do # get parameter values case "$1" in -help) # help information echo "" usage2 exit 0 ;; -m) # get mode shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID MODE SPECIFICATION ---" checkMinus "$1" mode=`echo "$1" | tr '[A-Z]' '[a-z]'` case "$mode" in normal) ;; grayscale) ;; colorized) ;; shaded) ;; composite) ;; *) errMsg "--- MODE=$mode IS AN INVALID VALUE ---" ;; esac ;; -e) # get etch shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID ETCH SPECIFICATION ---" checkMinus "$1" etch=`expr "$1" : '\([0-9]*\)'` [ "$etch" = "" ] && errMsg "--- ETCH=$etch MUST BE A NON-NEGATIVE INTEGER(s) ---" testA=`echo "$etch <= 0" | bc` [ $testA -eq 1 ] && errMsg "--- ETCH=$etch MUST BE A POSITIVE INTEGER ---" ;; -B) # get brightness shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID BRIGHTNESS SPECIFICATION ---" #checkMinus "$1" brightness=`expr "$1" : '\([-0-9]*\)'` [ "$brightness" = "" ] && errMsg "--- BRIGHTNESS=$brightness MUST BE A NON-NEGATIVE INTEGER ---" testA=`echo "$brightness < -100" | bc` testB=`echo "$brightness > 100" | bc` [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- BRIGHTNESS=$brightness MUST BE AN INTEGER BETWEEN -100 AND 100 ---" ;; -S) # get saturation shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID SATURATION SPECIFICATION ---" #checkMinus "$1" saturation=`expr "$1" : '\([-0-9]*\)'` [ "$saturation" = "" ] && errMsg "--- SATURATION=$saturation MUST BE A NON-NEGATIVE INTEGER ---" testA=`echo "$saturation < -100" | bc` testB=`echo "$saturation > 100" | bc` [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- SATURATION=$saturation MUST BE AN INTEGER BETWEEN -100 AND 100 ---" ;; -H) # get hue shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID HUE SPECIFICATION ---" #checkMinus "$1" hue=`expr "$1" : '\([-0-9]*\)'` [ "$hue" = "" ] && errMsg "--- HUE=$saturation MUST BE A NON-NEGATIVE INTEGER ---" testA=`echo "$hue < -360" | bc` testB=`echo "$hue > 360" | bc` [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- HUE=$saturation MUST BE AN INTEGER BETWEEN -360 AND 360 ---" ;; -c) # get color shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID COLOR SPECIFICATION ---" checkMinus "$1" color="$1" ;; -C) # get coloramt shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID COLORAMT SPECIFICATION ---" checkMinus "$1" coloramt=`expr "$1" : '\([0-9]*\)'` [ "$coloramt" = "" ] && errMsg "--- COLORAMT=$coloramt MUST BE A NON-NEGATIVE INTEGER(s) ---" testA=`echo "$coloramt < 0" | bc` testB=`echo "$coloramt > 100" | bc` [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- COLORAMT=$coloramt MUST BE INTEGER(s) BETWEEN 0 AND 100 ---" ;; -t) # get type shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID TYPE SPECIFICATION ---" checkMinus "$1" type=`echo "$1" | tr '[A-Z]' '[a-z]'` case "$type" in hardlight) ;; softlight) ;; overlay) ;; *) errMsg "--- TYPE=$type IS AN INVALID VALUE ---" ;; esac ;; -) # STDIN and end of arguments break ;; -*) # any other - argument errMsg "--- UNKNOWN OPTION ---" ;; *) # end of arguments break ;; esac shift # next option done # # get infile and outfile infile="$1" outfile="$2" fi # test that infile provided [ "$infile" = "" ] && errMsg "NO INPUT FILE SPECIFIED" # test that outfile provided [ "$outfile" = "" ] && errMsg "NO OUTPUT FILE SPECIFIED" # setup temporary images tmpA1="$dir/sketchetch_1_$$.mpc" tmpB1="$dir/sketchetch_1_$$.cache" trap "rm -f $tmpA1 $tmpB1; exit 0" 0 trap "rm -f $tmpA1 $tmpB1; exit 1" 1 2 3 15 # read the input image into the temporary cached image and test if valid convert -quiet -regard-warnings "$infile" -alpha off +repage $tmpA1 || echo "--- 1 FILE $infile DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAS ZERO size ---" # set up etch etching="" for ((i=0; i