mirror of
https://github.com/kmein/niveum
synced 2026-03-16 18:21:07 +01:00
22 lines
419 B
Nix
22 lines
419 B
Nix
# ref https://tex.stackexchange.com/a/502542
|
|
{
|
|
writers,
|
|
imagemagick,
|
|
ghostscript,
|
|
lib
|
|
}:
|
|
writers.writeDashBin "scanned" ''
|
|
export PATH=${lib.makeBinPath [ imagemagick ghostscript ]}:$PATH
|
|
|
|
[ $# -eq 1 -a -f "$1" -a -r "$1" ] || exit 1
|
|
|
|
${imagemagick}/bin/convert \
|
|
-density 150 \
|
|
"$1" \
|
|
-rotate 0.5 \
|
|
-attenuate 0.25 \
|
|
+noise Multiplicative \
|
|
-colorspace Gray \
|
|
"scanned-$1"
|
|
''
|