#!/bin/bash # # Developed by Fred Weinhaus 6/19/2015 .......... revised 6/19/2015 # # ------------------------------------------------------------------------------ # # 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: colorbalance2 [-c color] [-a amount] [-r region] [-l lowthresh] # [-h highthresh] infile outfile # # USAGE: colorbalance2 [-help] # # OPTIONS: # # -c color color to modify: red (r), yellow (y), green (g), # cyan (c), blue (b), magenta (m); default=red # -a amount amount (percent) of color change; float>0; default=25 # -r region region to change: midtones (m), shadows (s), # highlights (h); default=midtones # -l lowthresh low (shadow) value threshold; 0<=float<=100; # default=25 # -h highthresh high (hightlight) value threshold; 0<=float<=100; # default=75 # ### # # NAME: COLORBALANCE2 # # PURPOSE: To manually color balance an image in midtones, highlights, or # shadows. # # DESCRIPTION: COLORBALANCE2 manually color balances an image according to a # user selected color, region and amount. The regions are midtones, shadows, # or highlights. # # OPTIONS: # # -c color ... COLOR to modify. The choices are: red (r), yellow (y), # green (g), cyan (c), blue (b) or magenta (m). The default=red # # -a amount ... AMOUNT of color change. Values are float>=0 as percent, but # one can go over 100%. The default=25. # # -r region ... REGION of image to change. The choices are: midtones (m), # shadows (s), or highlights (h). The default=midtones. # # -l low ... LOW is shadow mask threshold value. Values are in the range # 0<=float<=100. The default=25. # # -h high ... HIGH is highlight mask threshold value. Values are in the # range 0<=float<=100. The default=75. # # # 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 color="red" # color: red, yellow, green, cyan, blue, magenta amount=25 # amount of change; float>=0 region="midtones" # midtones, highlights, shadows lowthresh=25 # shadow threshold highthresh=75 # highlight threshold # set directory for temporary files tmpdir="." # suggestions are tmpdir="." or tmpdir="/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 12 ] 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 ;; -c) # get color shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID COLOR SPECIFICATION ---" checkMinus "$1" color=`echo "$1" | tr '[A-Z]' '[a-z]'` case "$color" in red|r) color="red";; yellow|y) color="yellow";; green|g) color="green";; cyan|c) color="cyan";; blue|b) color="blue";; magenta|m) color="magenta";; *) errMsg "--- COLOR=$color IS AN INVALID VALUE ---" esac ;; -r) # get region shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID REGION SPECIFICATION ---" checkMinus "$1" region=`echo "$1" | tr '[A-Z]' '[a-z]'` case "$region" in midtones|m) region="midtones";; shadows|s) region="shadows";; highlights|h) region="highlights";; *) errMsg "--- REGION=$region IS AN INVALID VALUE ---" esac ;; -a) # get amount shift # to get the next parameter # test if parameter starts with minus sign errorMsg="--- INVALID AMOUNT SPECIFICATION ---" checkMinus "$1" amount=`expr "$1" : '\([.0-9]*\)'` [ "$amount" = "" ] && errMsg "--- AMOUNT=$amount MUST BE AN FLOAT ---" testA=`echo "$amount < 0" | bc` [ $testA -eq 1 ] && errMsg "--- AMOUNT=$amount MUST BE AN FLOAT GREATER OR EQUAL TO 0 ---" ;; -l) # get low shift # to get the next parameter - radius,sigma # test if parameter starts with minus sign errorMsg="--- INVALID LOW SPECIFICATION ---" checkMinus "$1" low=`expr "$1" : '\([.0-9]*\)'` [ "$low" = "" ] && errMsg "--- LOW=$low MUST BE A NON-NEGATIVE FLOAT ---" testA=`echo "$low < 0" | bc` testB=`echo "$low > 100" | bc` [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- LOW=$low MUST BE AN FLOAT BETWEEN 0 AND 100 ---" ;; -h) # get high shift # to get the next parameter - radius,sigma # test if parameter starts with minus sign errorMsg="--- INVALID HIGH SPECIFICATION ---" checkMinus "$1" high=`expr "$1" : '\([.0-9]*\)'` [ "$high" = "" ] && errMsg "--- HIGH=$high MUST BE A NON-NEGATIVE FLOAT ---" testA=`echo "$high < 0" | bc` testB=`echo "$high > 100" | bc` [ $testA -eq 1 -o $testB -eq 1 ] && errMsg "--- HIGH=$high MUST BE AN FLOAT BETWEEN 0 AND 100 ---" ;; -) # 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 [ "$outfile" = "" ] && errMsg "NO OUTPUT FILE SPECIFIED" # define dir dir="$tmpdir/COLORBALANCE.$$" mkdir "$dir" || errMsg "--- FAILED TO CREATE TEMPORARY FILE DIRECTORY ---" trap "rm -rf $dir;" 0 trap "rm -rf $dir; exit 1" 1 2 3 15 trap "rm -rf $dir; exit 1" ERR # read input image convert -quiet "$infile" $dir/tmpI.mpc || echo "--- FILE $infile DOES NOT EXIST OR IS NOT AN ORDINARY FILE, NOT READABLE OR HAS ZERO SIZE ---" # set up for factor from amount fact=`convert xc: -format "%[fx:$amount/100]" info:` #echo "fact=$fact;" # do processing if [ "$region" = "midtones" ]; then #echo "midtone" convert $dir/tmpI.mpc \ \( +clone -fill $color -colorize 100% \) \ \( -clone 0 -modulate 100,0,100 -solarize 50% -level 0x50% -evaluate multiply $fact \) \ -compose overlay -composite "$outfile" elif [ "$region" = "shadows" ]; then #echo "shadow" convert $dir/tmpI.mpc -negate \ \( +clone -fill $color -colorize 100% -negate \) \ \( -clone 0 -modulate 100,0,100 -black-threshold ${lowthresh}% -level ${lowthresh}x100% -evaluate multiply $fact \) \ -compose overlay -composite -negate "$outfile" elif [ "$region" = "highlights" ]; then #echo "highlight" convert $dir/tmpI.mpc \ \( +clone -fill $color -colorize 100% \) \ \( -clone 0 -modulate 100,0,100 -white-threshold ${highthresh}% -level 0x${highthresh}% -evaluate multiply $fact \) \ -compose overlay -composite "$outfile" fi exit 0