https://javarchive.com/911713-Reducing-Mosaic-JUFD-357-%E5%83%95%E3%81%AE%E3%83%9A%E3%83%83%E3%83%88%E3%81%AF%E7%88%86%E4%B9%B3%E3%82%A8%E3%82%B9%E3%83%86%E3%83%86%E3%82%A3%E3%82%B7%E3%83%A3%E3%83%B3%EF%BD%9E%E6%95%8F%E6%84%9F%E3%81%AA%E4%B9%B3%E6%88%BF%E3%81%8C%E5%92%BD%E3%81%B3%E6%B3%A3%E3%81%8F%E3%82%B5%E3%83%AD%E3%83%B3%E5%86%85%E8%AA%BF%E6%95%99%EF%BD%9E-%E9%A2%A8%E9%96%93%E3%82%86%E3%81%BF-pn.html