87 lines
3.3 KiB
Bash
87 lines
3.3 KiB
Bash
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#!/usr/bin/env bash
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set -euo pipefail
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shopt -s extglob
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if [ $# -ne 1 ]; then
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echo "Please use this script with a \"PATH\" to a folder your manga images"
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$(exit 1); echo "$?"
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fi
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dir=$1
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cd "$dir"
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out="$(basename "$dir")-cropped"
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# create a new directory to put our final cropped images
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mkdir -p "../$out"
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readarray -d '' images < <(find . -name "*\.jpeg" -print0)
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for image in "${images[@]}"; do
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# strip ./ from images and output current working on
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echo "Working on ${image#./}"
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noext="${image%.*}"
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ratio=$(identify -format "%[fx:w/h]" "$image")> /dev/null
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# get the image number
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num=$(echo "$noext" | grep -Eoe [0-9]{3})
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# strip leading 0s
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num="${num##+(0)}"
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# if number is empty (like with 000), set it to 0
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[[ -z "${num}" ]] && num=0
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# images with horizontal orientation
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if (( $(echo "$ratio > 1" | bc -l) )); then
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# check whether image should be double or single paged
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cropwidth=50
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# get image measurements
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width=$(identify -format "%w" "$image")
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height=$(identify -format "%h" "$image")
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left="$(convert "$image" -crop "${cropwidth}"x"${height}"+"$(echo "$width / 2 - $cropwidth" | bc -l)"+0 -resize 1x1\! -format "%[fx:mean]" info:-)"
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right="$(convert "$image" -crop ${cropwidth}x${height}+$(echo "$width / 2" | bc -l)+0 -resize 1x1\! -format "%[fx:mean]" info:-)"
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# if either left or right are above the threshold, split the image
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if (( $(echo "$left > 0.93" | bc -l) )) || (( $(echo "$right > 0.93" | bc -l) )); then
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# crop image in half
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convert -crop 50%x100% "$image" "../$out/$noext-%d.jpeg"
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# rename the -1, which is the first page to the original name
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mv "../$out/$noext-1.jpeg" "../$out/page${num}.jpeg"
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# increment image number
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((num++))
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# rename -0 to original image + 1 name
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mv "../$out/$noext-0.jpeg" "../$out/page${num}.jpeg"
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# copy double pages
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else
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cp "$image" "../$out/page${num}.jpeg"
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fi
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# images with vertical orientation
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else
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# copy all other images
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cp "$image" "../$out/page${num}.jpeg"
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fi
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done
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# find average color in an area
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# %[fx:int(255*r+.5)]: color value of R-channel
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# %[fx:mean]: overall brightness from 0 to 1
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# %[fx:mean.r]: brightness from 0 to 1 for R-channel
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#convert page001.jpeg -crop (area width)x(area height)+(x-coord top left)+(y-coord to left) -resize 1x1\! -format "%[fx:int(255*r+.5)],%[fx:int(255*g+.5)],%[fx:int(255*b+.5)]" info:-
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#convert page001.jpeg -crop 50x1650+1109+0 -resize 1x1\! -format "%[fx:mean],%[fx:mean.r],%[fx:mean.g],%[fx:mean.b]," info:-
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# left
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#convert page001.jpeg -crop 50x1650+1109+0 -resize 1x1\! -format "%[fx:mean]" info:-
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# right
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#convert page001.jpeg -crop 50x1650+1159+0 -resize 1x1\! -format "%[fx:mean]" info:-
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# crop image to the area specified
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#convert page001.jpeg -crop 100x1650+1109+0 page001-test.jpeg
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# one crop left and one crop right
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# if either one is over the threshold, we split the image
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#convert page001.jpeg -crop (crop width)x(image height)+(half image width - crop width)+0 page001-left.jpeg
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#convert page001.jpeg -crop (crop width)x(image height)+(half image width)+0 page001-right.jpeg
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# some values
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# for split, find lower numbers
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# to split: 0.969366
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# for not split, find highest numbers
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# not split: 0.917692
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