http://gihyo.jp/admin/serial/01/ubuntu-recipe/0102
$ ls *.jpg | xargs -I{} convert {} \ -modulate 100,120 -linear-stretch 0x1% \ -quality 90 -verbose converted_{}
めも
http://gihyo.jp/admin/serial/01/ubuntu-recipe/0102
$ ls *.jpg | xargs -I{} convert {} \ -modulate 100,120 -linear-stretch 0x1% \ -quality 90 -verbose converted_{}
めも