Yes! its possible. You can call laigter from the command line with --help to see the possible parameters.
In summary, doing `laigter.exe -d "path to texture" -n` will generate normal maps with default settings.
You can use the ui to generate some presets, and then use the switch -r to tell laigter which preset to use while generating through the cmd.
Okay only issue is I can't seem to get the preset working from the command line. I can create a preset in the gui and export it somewhere, but whatever I try to point the arguments at the preset file, whether in the same directory or not, doesn't seem to get used. The defaults would be fine actually, if only they included transparency/copying the alpha channel. Is there something I'm missing or is this perhaps a bug with the command line usage?