sobel算子原理是怎样的
Sobel\u7b97\u5b50\u7684\u7531\u6765\u5bf9\u4e8e\u5df2\u7ecf\u5199\u5165\u6570\u5b57\u56fe\u50cf\u5904\u7406\u53ca\u673a\u5668\u89c6\u89c9\u6559\u79d1\u4e66\u591a\u5e74\u7684Sobel\u7b97\u5b50\uff0c\u8c01\u4e5f\u6ca1\u66fe\u8ffd\u95ee\u548c\u5173\u5fc3\u8fc7\u5b83\u7684\u53d1\u660e\u80cc\u666f\u548c\u5386\u53f2\u3002\u6700\u8fd1\uff0c\u7ed9\u5b66\u751f\u4e0a\u201c\u5149\u7535\u56fe\u50cf\u5904\u7406\u201d\u8bfe\uff0c\u60f3\u4ecb\u7ecd\u4e00\u4e0b\u8be5\u7b97\u5b50\u7684\u6765\u5386\uff0c\u67e5\u4e86\u5f88\u591a\u6587\u732e\uff0c\u5c31\u662f\u627e\u4e0d\u5230\u539f\u59cb\u6587\u732e\u3002Google\u5b66\u672f\u91cc\u641c\u7d22\uff0c\u4fe1\u606f\u5f88\u591a\uff0c\u5374\u4e0d\u4e00\u81f4\u3002\u6709\u6807\u6ce8\u4e3a\u671f\u520a\u8bba\u6587\u7684\uff0c\u4e5f\u6709\u6807\u6ce8\u51fa\u7248\u7269\u6790\u51fa\u7684\uff0c\u51fa\u7248\u65f6\u95f4\u4e5f\u4e0d\u4e00\u81f4\uff08\u5188\u8428\u96f7\u65af\u300aDigital Image Processing\u300b\u6559\u6750\u6807\u6ce8\u7684\u65f6\u95f4\u4e3a1970\u5e74\uff09\u3002\u8fd9\u4e2a\u770b\u4f3c\u7b80\u5355\uff0c\u4f46\u9886\u57df\u5185\u79d1\u7814\u3001\u5f00\u53d1\u4eba\u5458\u6cbf\u7528\u4e86\u51e0\u5341\u5e74\u7684\u8fb9\u7f18\u68c0\u6d4b\u7b97\u5b50\u7a76\u7adf\u5982\u4f55\u4ea7\u751f\u7684\uff1f\u5076\u7136\u53d1\u73b0\u4e86\u4e00\u4e2a\u5e16\u5b50\uff0c\u8be5\u7b97\u5b50\u7684\u63d0\u51fa\u8005Irwin Sobel\u5728\u7b97\u5b50\u4ea7\u751f\u591a\u5e74\u540e\u4e8e\u8be5\u5e16\u4e2d\u8be6\u7ec6\u8c08\u5230\u5b83\u7684\u7531\u6765\u548c\u5b9a\u4e49\u3002\u539f\u6765\uff0c\u8fd9\u4e2a\u8457\u540d\u7684Sobel\u8fb9\u7f18\u7b97\u5b50\uff0c\u5f53\u5e74\u4f5c\u8005\u5e76\u6ca1\u6709\u516c\u5f00\u53d1\u8868\u8fc7\u8bba\u6587\uff0c\u4ec5\u4ec5\u662f\u5728\u4e00\u6b21\u535a\u58eb\u751f\u8bfe\u9898\u8ba8\u8bba\u4f1a(1968)\u4e0a\u63d0\u51fa("A 3x3 Isotropic Gradient Operator for Image Processing")\uff0c\u540e\u57281973\u5e74\u51fa\u7248\u7684\u4e00\u672c\u4e13\u8457\uff08"Pattern Classification and Scene Analysis"\uff09\u7684\u811a\u6ce8\u91cc\u4f5c\u4e3a\u6ce8\u91ca\u51fa\u73b0\u548c\u516c\u5f00\u7684\u3002
\u6211\u89c9\u5f97\u4f60\u8fd9\u4e2a\u8bf4\u6cd5\u5c31\u6709\u95ee\u9898\uff0csobel\u8fb9\u7f18\u68c0\u6d4b\u8fd0\u7528sobel\u7b97\u5b50\uff0c\u5c31\u662f3\u00d73\u6216\u80055\u00d75\u7b49\u7b49\u4e4b\u7c7b\u7684\u77e9\u9635\uff0ccanny\u662f\u5728sobel\u7b97\u6cd5\u7684\u57fa\u7840\u4e0a\u52a0\u4ee5\u6539\u8fdb\uff0c\u5e76\u6ca1\u6709canny\u7b97\u5b50\uff0ccanny\u7b97\u6cd5\u7684\u8fb9\u7f18\u68c0\u6d4b\u90e8\u5206\u5c31\u662fsobel\u7b97\u6cd5\u3002
绛旓細甯歌鐨勮竟缂樻娴嬬畻瀛愭湁Roberts绠楀瓙銆丳rewitt绠楀瓙銆Sobel绠楀瓙銆丮arr-Hidreth杈圭紭妫娴嬩互鍙奵anny绠楀瓙绛夈備竴銆佸埄鐢ㄦ搴﹁繘琛岃竟缂樻娴1銆丷oberts绠楀瓙閲囩敤瀵硅绾挎柟鍚戠浉閭讳袱鍍忕礌涔嬪樊杩戜技鐨勬搴﹀箙鍊兼潵妫娴嬭竟缂樸傝绠楀瓙瀹氫綅杈冨噯纭紝浣嗗鍣０姣旇緝鏁忔劅锛屾娴嬫按骞冲拰绔栫洿杈圭紭鏁堟灉濂戒簬鏂滃悜杈圭紭銆2銆丼obel绠楀瓙鏍规嵁鍥惧儚鐨勫儚绱犵偣涓婁笅銆...
绛旓細鎴戣寰椾綘杩欎釜璇存硶灏辨湁闂锛宻obel杈圭紭妫娴嬭繍鐢sobel绠楀瓙锛屽氨鏄3脳3鎴栬5脳5绛夌瓑涔嬬被鐨勭煩闃碉紝canny鏄湪sobel绠楁硶鐨勫熀纭涓婂姞浠ユ敼杩涳紝骞舵病鏈塩anny绠楀瓙锛宑anny绠楁硶鐨勮竟缂樻娴嬮儴鍒嗗氨鏄痵obel绠楁硶銆
绛旓細4.2.1 Roberts绠楁硶鍘熺悊 Roberts绠楀瓙鏄涓绉嶆渶绠鍗曠殑绠楀瓙锛屾槸涓绉嶅埄鐢ㄥ眬閮ㄥ樊鍒嗙畻瀛愬鎵捐竟缂樼殑绠楀瓙锛屼粬閲囩敤瀵硅绾挎柟鍚戠浉閭讳袱璞＄礌涔嬪樊杩戜技姊害骞呭兼娴嬭竟缂樸傛娴嬪瀭鐩磋竟缂樼殑鏁堟灉濂戒簬鏂滃悜杈圭紭锛屽畾浣嶇簿搴﹂珮锛屽鍣０鏁忔劅,鏃犳硶鎶戝埗鍣０鐨勫奖鍝嶃4.2.2 绠楁硶娴佺▼ Roberts绠楀瓙鍦2脳2棰嗗煙涓婅绠楀瑙掑鏁 锛4-1锛夋垚...
绛旓細杈圭紭鎻愬彇鍏跺疄涔熸槸涓绉嶆护娉紝涓嶅悓鐨勭畻瀛愭湁涓嶅悓鐨勬彁鍙栨晥鏋溿傛瘮杈冨父鐢ㄧ殑鏂规硶鏈変笁绉嶏紝Sobel绠楀瓙锛孡aplacian绠楀瓙锛孋anny绠楀瓙銆係obel绠楀瓙妫娴嬫柟娉曞鐏板害娓愬彉鍜屽櫔澹拌緝澶氱殑鍥惧儚澶勭悊鏁堟灉杈冨ソ锛sobel绠楀瓙瀵硅竟缂樺畾浣嶄笉鏄緢鍑嗙‘锛屽浘鍍忕殑杈圭紭涓嶆涓涓儚绱狅紱褰撳绮惧害瑕佹眰涓嶆槸寰堥珮鏃讹紝鏄竴绉嶈緝涓哄父鐢ㄧ殑杈圭紭妫娴嬫柟娉曘侰anny鏂规硶...
绛旓細鐒跺悗纭畾杈圭紭鍍忕礌鐨勫瘑搴︼紝骞堕氳繃璁惧畾闃堝兼潵鎻愬彇鍑鸿竟缂樼偣闆嗐傜敱浜庡浘鍍忕殑杈圭紭鍜岃疆寤撻氬父鏂瑰悜鏄笉纭畾鐨勶紝閭ｅ氨蹇呴』鎵惧埌涓浜涚畻瀛愶紝杩欎簺绠楀瓙瀵逛换鎰忔柟鍚戞湁鐩稿悓鐨勮竟缂樺拰杞粨妫娴嬭兘鍔涖傞氬父鐨勮竟缂樻娴嬬畻瀛愬寘鎷琑obert绠楀瓙锛 Sobel绠楀瓙锛孭rewitt绠楀瓙锛孡OG绠楀瓙锛 Canny绠楀瓙锛岄浂浜ゅ弶绠楀瓙锛屼簩鍊煎浘鍍忚竟缂樻娴嬬瓑绛夈
绛旓細1. Sobel绠楀瓙 鍦ㄨ竟娌挎娴嬩腑锛屽父鐢ㄧ殑涓绉嶆ā鏉挎槸Sobel 绠楀瓙銆係obel 绠楀瓙鏈変袱涓紝涓涓槸妫娴嬫按骞宠竟娌跨殑 锛涘彟涓涓槸妫娴嬪瀭鐩村钩杈规部鐨 銆備笌 鍜 鐩告瘮锛孲obel绠楀瓙瀵逛簬璞＄礌鐨勪綅缃殑褰卞搷鍋氫簡鍔犳潈锛屽洜姝ゆ晥鏋滄洿濂姐係obel绠楀瓙鍙︿竴绉嶅舰寮忔槸鍚勫悜鍚屾obel(Isotropic Sobel)绠楀瓙锛屼篃鏈変袱涓紝涓涓槸妫娴嬫按骞...
绛旓細鏄傚鎵惧浘鍍忎腑鐨勮竟缂樻槸涓轰簡鎵惧埌鍙樺寲闈炲父寮虹儓鐨勭浉閭诲儚绱狅紝渚嬪浠0-255鎴栦粠255-0锛屽洜姝よ竟缂樻槸0銆傛暟鍊煎井鍒嗗彲浠ユ眰鍙樺寲鐜囷紝鍦ㄥ浘鍍忎笂绂绘暎鍊兼眰姊害锛屽浘鍍忓鐞嗕腑鏈夊绉嶈竟缂樻娴嬶紙姊害锛夌畻瀛愶紝甯哥敤鐨勫寘鎷櫘閫氫竴闃跺樊鍒嗭紝Robert绠楀瓙锛堜氦鍙夊樊鍒嗭級锛Sobel绠楀瓙锛屼簩闃舵媺鏅媺鏂畻瀛愮瓑绛夛紝鏄熀浜庡鎵炬搴﹀己搴︺
绛旓細鍦ㄥ疄闄呭浘鍍忓鐞嗕腑锛屼簩闃跺樊鍒嗗父鐢ㄤ簬閿愬寲鍥惧儚銆佽竟缂樻娴嬪拰鍥惧儚骞虫粦澶勭悊鐨勫弽鎿嶄綔銆傞氳繃璋冩暣鏉冮噸鍙傛暟锛屾垜浠彲浠ョ簿纭帶鍒惰竟缂樼殑寮哄害鍜岀粏鑺備繚鐣欙紝浠庤岃揪鍒扮悊鎯崇殑鏁堟灉銆備緥濡傦紝Sobel绠楀瓙鍜孡aplacian绠楀瓙灏辨槸鍩轰簬浜岄樁宸垎鍘熺悊鐨甯歌宸ュ叿銆傜粨璁 鍥惧儚鐨勪簩闃跺樊鍒嗭紝灏卞儚鍥惧儚澶勭悊涓殑璋冭壊甯堬紝鐢ㄥ叾鐙壒鐨勯瓟鍔涙弿缁樺嚭缁嗚吇鐨勮竟缂樺拰...
绛旓細Google瀛︽湳閲屾悳绱紝淇℃伅寰堝锛屽嵈涓嶄竴鑷淬傛湁鏍囨敞涓烘湡鍒婅鏂囩殑锛屼篃鏈夋爣娉ㄥ嚭鐗堢墿鏋愬嚭鐨勶紝鍑虹増鏃堕棿涔熶笉涓鑷达紙鍐堣惃闆锋柉銆奃igital Image Processing銆嬫暀鏉愭爣娉ㄧ殑鏃堕棿涓1970骞达級銆傝繖涓湅浼肩畝鍗曪紝浣嗛鍩熷唴绉戠爺銆佸紑鍙戜汉鍛樻部鐢ㄤ簡鍑犲崄骞寸殑杈圭紭妫娴嬬畻瀛愮┒绔濡備綍浜х敓鐨勶紵鍋剁劧鍙戠幇浜嗕竴涓笘瀛愶紝璇绠楀瓙鐨鎻愬嚭鑰匢rwin Sobel鍦...
绛旓細sobel绠楀瓙鐨闃堝兼寚鐨勬槸鍏跺悇鍍忕礌缁忚繃鍋忓璁＄畻鍚庡緱鍒扮殑grad=fx+fy锛屽grad杩涜闃堝煎垎鍓插緱鍒拌竟缂樼殑銆傜敱浜庡湪sobel绠楀瓙涓姞鍏ヤ簡鏉冨兼墍浠ユ墍寰楃殑缁撴灉浼氬鑷存墍寰楄竟缂樿緝瀹姐俧x=abs(Data[i+1][j-1]+2*Data[i+1][j]+Data[i+1][j+1]-Data[i-1][j-1]-2*Data[i-1][j]-Data[i-1][j+1]);...
