2023-02-24 23:10:45 +01:00
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# ref https://tex.stackexchange.com/a/502542
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{
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writers,
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imagemagick,
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2025-10-02 18:34:10 +02:00
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ghostscript,
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2025-12-27 22:22:54 +01:00
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lib,
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2023-02-24 23:10:45 +01:00
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}:
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writers.writeDashBin "scanned" ''
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2025-12-27 22:22:54 +01:00
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export PATH=${
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lib.makeBinPath [
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imagemagick
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ghostscript
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]
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}:$PATH
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2025-10-02 18:34:10 +02:00
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2023-02-24 23:10:45 +01:00
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[ $# -eq 1 -a -f "$1" -a -r "$1" ] || exit 1
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${imagemagick}/bin/convert \
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-density 150 \
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"$1" \
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-rotate 0.5 \
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-attenuate 0.25 \
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+noise Multiplicative \
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-colorspace Gray \
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"scanned-$1"
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''
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