$ cargo install picterm

$ git clone https://github.com/ksk001100/picterm
$ cd picterm
$ cargo install --path .

$ picterm --help # => Show help
$ picterm -h
$ picterm # => Current directory
$ picterm ./
$ picterm $HOME/Downloads/
$ picterm ~/Pictures/sample.png
$ picterm ~/Pictures/sample.png --gray # => Gray scale mode
$ picterm ~/Pictures/ -g # => Gray scale mode