144 lines
4.1 KiB
Bash
144 lines
4.1 KiB
Bash
#!/bin/bash
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usage="\
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Usage: $0 [-p PREFIX] [-s SUFFIX] [-e EXTENSION] [-g \"GEOMETRY\"] [-q QUALITY] [-v] image1 image2 image3 ...\n
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Use ImageMagick's convert tool to reduce the size of a selection of image files.\n
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\n
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Options:\n
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-p PREFIX\tAdd a prefix to output file name. Can be used to provide a \n
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\t\tdifferent output folder.\n
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-s SUFFIX\tAppend a suffix to the file name, before the extension.\n
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-t\t\tReplace the filename with creation time from exif\n
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-g \"GEOMETRY\"\tSpecify a desired geometry. Default : \"1920x1080>\" \n
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\t\t(see https://www.imagemagick.org/Magick++/Geometry.html\n
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\t\tfor detailled doc)\n
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-e EXTENSION\tSpecify a file extension (recognized by Magick).\n
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\t\tIf not specified, reuse orinal file's extension. \n
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-q QUALITY\tSet the jpeg compression rate in %. Default : 85\n
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-x\t\tStrip exif metadata. Default off\n
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-t\t\tUse exif creation time instead of original filename when renaming.\n
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\t\tCan be used with -p and -s\n
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-S\t\tDeactivate JPEG sampling factor. First level of compression, very little \n
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\t\tloss in quality. Default on (4:2:0)\n
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-m\t\tDeactivate median blurring of the image. This filter can smooth some of\n
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\t\tthe noise with minimal loss in details. \n
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\t\tBetter compression, with some loss of quality. Default on.\n
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-M SIZE\tSpecify the size of the median blurr (useful for fine-tuning text scans).\n
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\t\tDefault: 2\n
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-G\t\tApply gaussian blurr to the image. Smooths noise in background or low-light\n
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\t\timages, but creates a loss of detail. \n
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\t\tBest compression, most loss of quality. Default off\n
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-v\t\tMake verbose\n
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-P\t\tPrint progress (for use with zenity --progress)\n
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-h\t\tPrint this help and exit.\n"
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if [[ $# == 0 ]] ; then echo -e $usage ; exit 0 ; fi
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#Preset defaults
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nopt=1
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geom="1920x1080>"
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qual="85"
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ext="jpg"
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verbose=false
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sampling="-sampling-factor 4:2:0"
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median="2x2-1-1"
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while getopts p:s:g:q:M:e:xGmhSvPt option ; do
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case "${option}"
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in
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p) ((nopt+=2)) ;
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prefix=${OPTARG}
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;;
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s) ((nopt+=2)) ;
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suffix=${OPTARG}
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;;
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g) ((nopt+=2)) ;
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geom=${OPTARG}
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;;
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q) ((nopt+=2)) ;
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qual=${OPTARG}
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;;
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t) ((nopt+=1)) ;
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time=true;
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;;
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e) ((nopt+=2)) ;
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EXT=${OPTARG}
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;;
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v) ((nopt+=1)) ;
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verbose=true;
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;;
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P) ((nopt+=1)) ;
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progress=0;
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;;
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x) ((nopt+=1)) ;
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exif=true;
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;;
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S) ((nopt+=1)) ;
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unset sampling;
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;;
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G) ((nopt+=1)) ;
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gaussian=true;
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;;
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m) ((nopt+=1)) ;
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unset median
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;;
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M) ((nopt+=2)) ;
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a=${OPTARG}
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b=$((a/2))
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median=$a\x$a-$b-$b
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echo $median
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unset a
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unset b
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;;
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h | -help)
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echo -e $usage ;
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exit 0
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;;
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*)
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echo -e $usage ;
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echo "Unreconized option: ${option} ${OPTARG}"
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exit 0
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;;
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esac
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done
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test $verbose == true && echo -e "Old file \t Old size \t Old res \t New res \t New size \t New file \t Compression"
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for f in "${@:$nopt}" ; do
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test "$verbose" == true && status="$f \t $(ls -lh $f | cut -d " " -f 5) \t $(identify $f | rev | cut -d " " -f 7 | rev) \t " ; size=$(ls -l "$f" | cut -d " " -f 5)
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name="$(echo $f | rev | cut -d '.' -f 2- | rev)"
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ext="${EXT:-$(echo $f | rev | cut -d '.' -f 1 | rev)}"
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test "$time" && exif -m -t "DateTime" "$f" > /dev/null && name="$(exif -m -t "DateTime" $f | tr ": " ".-")" || echo "$f : no DateTime found in exif data. Using filename instead."
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nf="$prefix""$name""$suffix"."$ext"
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while test -e $nf ; do nf="$prefix""$name""$suffix"_$(((++i)))."$ext" ; done
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unset i
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((insize+=$(ls -l "$f" | cut -d " " -f 5)))
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convert \
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-auto-orient \
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-define jpeg:dct-method=float \
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$sampling \
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${median:+\-median $median} \
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-interlace Plane \
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${gaussian:+-gaussian-blur 0.1} \
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-colorspace RGB \
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-resize "$geom" \
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-quality "$qual" "$f" "$nf";
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test "$exif" = true && exif --remove --no-fixup -o $nf $nf > /dev/null
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((outsize+=$(ls -l "$nf" | cut -d " " -f 5)))
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test $verbose == true && echo -e $status"$(identify "$nf" | rev | cut -d " " -f 7 | rev) \t $(ls -lh "$nf" | cut -d " " -f 5) \t "$nf" \t $((100*$(ls -l "$nf" | cut -d " " -f 5)/$size))% "
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test $progress && echo $(((++progress * 100 / $#)))
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done
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test $verbose == true && echo -e "Average compression : $((100*outsize/insize))%"
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