fix: stick to namespace

[user/henk/vcsh/zsh.git] / .zsh_functions / henks_scan_postproc

diff --git a/.zsh_functions/henks_scan_postproc b/.zsh_functions/henks_scan_postproc
new file mode 100644 (file)
index 0000000..e721f4c
--- /dev/null
+++ b/.zsh_functions/henks_scan_postproc
@@ -0,0 +1,30 @@
+setopt PIPE_FAIL
+
+local resize_by
+local img
+resize_by="$1"
+shift
+for img in $*
+do
+       echo "Processing ${img} ..."
+       # mostly to remove the alpha channel so ocrmypdf can work with it
+       # does not seem to work all the time, so 'convert' is used as well below
+       # still nice to optimize
+       optipng "${img}"
+       if [ $? -ne 0 ]
+       then
+               echo "optipng failed"
+               return
+       fi
+       # resize
+       # and remove alpha channel so ocrmypdf can work with it
+       # ocrmypdf does the quantization of the png which reduces size drastically
+       convert -resize $resize_by% -alpha off "$img" - \
+       | ocrmypdf - "$(basename $img .png).pdf"
+       if [ $? -ne 0 ]
+       then
+               echo "convert or ocrmypdf failed"
+               return
+       fi
+done
+