http://python-gazo.blog.jp/algorithm/canny%E3%82%A8%E3%83%83%E3%82%B8%E6%A4%9C%E5%87%BA%E5%99%A8http://mixi.jp/view_bbs.pl?comm_id=41490&id=1600799ftp://publications.ai.mit.edu/ai-publications/pdf/AITR-720.pdfhttp://www.motorwarp.com/koizu…