https://jp.techcrunch.com/2014/04/17/20140416googles-new-street-view-image-recognition-algorithm-can-beat-most-captchas/
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CAPTCHA（ã„ã‚ゆる画åƒèªè¨¼ï¼‰ã®å®Ÿè£…ã®ä¸€ã¤ã«Googleã®reCAPTCHAã¨ã„ã†ã‚‚ã®ãŒã‚ã‚‹ãŒã€ä»Šæ—¥ã®æ˜¼ã«ã“ã‚“ãªã‚‚ã®ã«å¼•ã£ã‹ã‹ã£ãŸã€‚ ウムラウト付ãã®captchaã¨ã‹å¾®å¦™ã«é›£æ˜“度高ã„ãªã“れｗ URL 2011-09-30 11:53:27 via Janetter2 @mashabow ç§ã¯biÅ¿hopを出ã•ã‚ŒãŸã“ã¨ãŒã‚ã‚Šã¾ã™ï½— bishopã§é€šã‚Šã¾ã—ãŸãŒ 2011-09-30 11:56:53 via Tween to @mashabow ã©ã†ã‚„らreCAPTCHAã¯ã€a–zã®26æ–‡å—以外ã®ã‚¢ãƒ«ãƒ•ã‚¡ãƒ™ãƒƒãƒˆã‚‚出ã—ã¦ãるらã—ã„。é¢ç™½ãã†ã ã£ãŸã®ã§ã€æ›´æ–°ãƒœã‚¿ãƒ³ï¼ˆçŸ¢å°ãŒå·´å½¢ã«ãªã£ã¦ã„るボタン）を押ã—ã¾ãã£ã¦å¤‰ãªã‚‚ã®ãŒå‡ºã¦ã“ãªã„ã‹æŽ¢ã—ã¦ã¿ãŸã€‚ reCAPTCHAã®ç„¡èŒ¶æŒ¯ã‚Šãƒ»åˆç´šç¯‡ thouÅ¿and。上ã®ãƒ„イートã«ã‚‚出ã¦ã㟠ſ ã¯ã„ã‚ゆる長ã„sã§ã€ç¾ä»£é¢¨ã«è¡¨è¨˜ã™ã‚Œã° thousand。å¤ã„本
Railsã§Captchaèªè¨¼ã®ç”»åƒä½œæˆ: Rails開発日記
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E X P R E S S I C A » Simple Captcha
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ruby on railsã§CAPTCHA（画åƒèªè¨¼ï¼‰ã‚’実装ã™ã‚‹ã€‚ simple_captchaç·¨
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GitHub - achiurizo/rack-recaptcha: Rack Middleware for CAPTCHA verification via Recaptcha API
Introducing validates_captcha - m4n.inspect
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