http://tjstamp.tonytonyjan.net
> gem install tjstamp
# Basic Usage
require 'tjstamp'
tjs = TJStamp.new(name: '朕知道了', background_color: 'white')
image = tjs.stamp # => Magick::Image
image.display
# Write to file
tjs.update name: '王小明', size: 512
tjs.stamp.write '/tmp/wang.png'
name: Default:"王小明"size:Default:256corner_size: Default:10stroke_width: Default:20font: Path to font file, Default:"simsun.ttf"color: Check here for more information. Default:"red"background_color: Default:"none"