Diff of Canny

• The added line is THIS COLOR.
• The deleted line is THIS COLOR.
• Go to Canny.

- https://en.wikipedia.org/wiki/Canny_edge_detector
- http://opencv.blog.jp/[http://opencv.blog.jp/algorithm/canny%E3%82%A8%E3%83%83%E3%82%B8%E6%A4%9C%E5%87%BA%E5%99%A8 algorithm/cannyエッジ検出器]

- Canny edge detection
--  http://imagingsolution.net/imaging/canny-edge-detector/
 １．ノイズ除去 (ガウシアン)
 ２．輪郭抽出 (ソーベル)
 ３．非極大抑制 (エッジ以外を消す)
 ４．ヒステリシスしきい値処理 (弱いエッジを消す、中ぐらいのエッジは強いエッジに繋がらないものを消す)

- iPhoneアプリ「漫画カメラ」で使われている画像処理手法その1
--  https://news.mynavi.jp/article/computer_vision-40/
 処理1:入力画像のDoG画像(Difference of Gaussian)を生成
 処理2:Non-maximal suppression(局所的に最大値以外を0に抑える)
 処理3:ヒステリシスしきい値処理

- [http://python-gazo.blog.jp/algorithm/canny%E3%82%A8%E3%83%83%E3%82%B8%E6%A4%9C%E5%87%BA%E5%99%A8 http://python-gazo.blog.jp/algorithm/cannyエッジ検出器] ([https://web.archive.org/web/20150418053016/http://python-gazo.blog.jp/algorithm/canny%E3%82%A8%E3%83%83%E3%82%B8%E6%A4%9C%E5%87%BA%E5%99%A8 webarchive])

- Canny edge detectionの処理アルゴリズム
--  https://imagingsolution.net/imaging/canny-edge-detector/