{"id":3149,"date":"2023-07-06T11:23:39","date_gmt":"2023-07-06T03:23:39","guid":{"rendered":"https:\/\/www.yatenglg.cn\/blog\/?p=3149"},"modified":"2023-07-06T11:26:51","modified_gmt":"2023-07-06T03:26:51","slug":"cv2-findcontours-opencv%e8%bd%ae%e5%bb%93%e6%8f%90%e5%8f%96","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=3149","title":{"rendered":"cv2.findContours opencv\u8f6e\u5ed3\u63d0\u53d6"},"content":{"rendered":"\n

\u539f\u6587\u5730\u5740\uff1ahttps:\/\/blog.csdn.net\/vclearner2\/article\/details\/120776685<\/a><\/p>\n\n\n\n

contours, hierarchy = cv2.findContours(img, mode, method)<\/strong>\n\nimg: \u5355\u901a\u9053\u4e8c\u503c\u56fe\u3002\uff08\u767d\u8272\u662f\u524d\u666f\uff0c\u9ed1\u8272\u662f\u80cc\u666f\uff09\nmode: \u8f6e\u5ed3\u8fd4\u56de\u6a21\u5f0f\u3002\n              \uff081\uff09RETR_EXTERNAL\uff0c \u53ea\u8fd4\u56de\u5916\u8f6e\u5ed3\n              \uff082\uff09RETR_LIST\uff0c \u8fd4\u56de\u6240\u6709\u8f6e\u5ed3\uff0c\u4e0d\u5efa\u7acb\u7b49\u7ea7\u5173\u7cfb\n              \uff083\uff09RETR_CCOMP\uff0c\u8fd4\u56de\u6240\u6709\u8f6e\u5ed3\uff0c\u5efa\u7acb\u4e24\u5c42\u7b49\u7ea7\u7ed3\u6784\n              \uff084\uff09RETR_TREE\uff0c\u8fd4\u56de\u6240\u6709\u8f6e\u5ed3\uff0c\u5efa\u7acb\u5b8c\u6574\u7684\u7b49\u7ea7\u7ed3\u6784\nmethod: \u8f6e\u5ed3\u5b58\u50a8\u65b9\u5f0f\u3002\n              \uff081\uff09CHAIN_APPROX_NONE\uff0c \u8fd4\u56de\u6240\u6709\u8f6e\u5ed3\u70b9\n              \uff082\uff09CHAIN_APPROX_SIMPLE\uff0c \u53ea\u4fdd\u5b58\u8f6e\u5ed3\u7684\u89d2\u70b9\n              \uff083\uff09CHAIN_APPROX_TC89_L1\n              \uff083\uff09CHAIN_APPROX_TC89_KCOS\n\ncontours: \u8f6e\u5ed3\u5217\u8868\u3002\nhierarchy: \u8f6e\u5ed3\u7b49\u7ea7\u3002<\/pre>\n\n\n\n
hierarchy<\/strong>\u4ee5[\u524d\uff0c\u540e\uff0c\u5b50\uff0c\u7236]\u7684\u987a\u5e8f\uff0c\u5b58\u50a8\u8f6e\u5ed3\u7d22\u5f15\u3002<\/pre>\n\n\n\n
\u4e00. \u793a\u4f8b<\/h1>\n\n\n\n
\"\"<\/figure>\n\n\n\n
1. \u53ea\u63d0\u53d6\u5916\u8f6e\u5ed3<\/h2>\n\n\n\n
contours, hierarchy = cv2.findContours(fgmask, cv2.RETR_EXTERNAL<\/strong>, cv2.CHAIN_APPROX_NONE)<\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
hierarchy\u8fd4\u56de\u503c\uff1a<\/p>\n\n\n\n
\u5e8f\u53f7<\/td>\u540e<\/strong><\/td>\u524d<\/strong><\/td>\u5b50<\/strong><\/td>\u7236<\/strong><\/td><\/tr>
0<\/td>1 <\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td><\/tr>
1<\/td>2  <\/strong><\/td>0 <\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td><\/tr>
2<\/td>-1 <\/strong><\/td>1<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
2. \u8fd4\u56de\u6240\u6709\u8f6e\u5ed3\uff0c\u4e0d\u5efa\u7acb\u7b49\u7ea7\u5173\u7cfb<\/h2>\n\n\n\n
contours, hierarchy = cv2.findContours(fgmask, cv2.RETR_LIST<\/strong>, cv2.CHAIN_APPROX_NONE)<\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
hierarchy\u8fd4\u56de\u503c\uff1a<\/p>\n\n\n\n
\u5e8f\u53f7<\/td>\u540e<\/strong><\/td>\u524d<\/strong><\/td>\u5b50<\/strong><\/td>\u7236<\/strong><\/td><\/tr>
0<\/td>1<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td><\/tr>
1<\/td>2<\/strong><\/td>0<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td><\/tr>
2<\/td>3<\/strong><\/td>1<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td><\/tr>
3<\/td>4<\/strong><\/td>2<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td><\/tr>
…<\/td><\/td><\/td><\/td><\/td><\/tr>
9<\/td>-1<\/strong><\/td>8<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
3. \u8fd4\u56de\u6240\u6709\u8f6e\u5ed3\uff0c\u5efa\u7acb\u4e8c\u5c42\u7b49\u7ea7\u5173\u7cfb<\/h2>\n\n\n\n
contours, hierarchy = cv2.findContours(fgmask, cv2.RETR_CCOMP, cv2.CHAIN_APPROX_NONE)<\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
hierarchy\u8fd4\u56de\u503c\uff1a<\/p>\n\n\n\n
\u5e8f\u53f7<\/td>\u540e<\/strong><\/td>\u524d<\/strong><\/td>\u5b50<\/strong><\/td>\u7236<\/strong><\/td><\/tr>
0<\/td>2<\/strong><\/td>-1<\/strong><\/td>1<\/td>-1<\/strong><\/td><\/tr>
1<\/td>-1<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td>0<\/strong><\/td><\/tr>
2<\/td>4<\/strong><\/td>0<\/strong><\/td>3<\/strong><\/td>-1<\/strong><\/td><\/tr>
3<\/td>-1<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td>2<\/strong><\/td><\/tr>
4<\/td>6<\/strong><\/td>2<\/strong><\/td>5<\/strong><\/td>-1<\/strong><\/td><\/tr>
5<\/td>-1<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td>4<\/strong><\/td><\/tr>
6<\/td>-1<\/strong><\/td>4<\/strong><\/td>7<\/strong><\/td>-1<\/strong><\/td><\/tr>
7<\/td>8<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td>6<\/strong><\/td><\/tr>
8<\/td>9<\/strong><\/td>7<\/strong><\/td>-1<\/strong><\/td>6<\/strong><\/td><\/tr>
9<\/td>-1<\/strong><\/td>8<\/strong><\/td>-1<\/strong><\/td>6<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n
4. \u8fd4\u56de\u6240\u6709\u8f6e\u5ed3\uff0c\u5efa\u7acb\u5b8c\u6574\u7b49\u7ea7\u5173\u7cfb<\/p>\n\n\n\n
contours, hierarchy = cv2.findContours(fgmask, cv2.RETR_TREE<\/strong>, cv2.CHAIN_APPROX_NONE)<\/pre>\n\n\n\n
\"\"<\/figure>\n\n\n\n
hierarchy\u8fd4\u56de\u503c\uff1a<\/p>\n\n\n\n
\u5e8f\u53f7<\/td>\u540e<\/strong><\/td>\u524d<\/strong><\/td>\u5b50<\/strong><\/td>\u7236<\/strong><\/td><\/tr>
0<\/td>4<\/strong><\/td>-1<\/strong><\/td>1<\/td>-1<\/strong><\/td><\/tr>
1<\/td>-1<\/strong><\/td>-1<\/strong><\/td>2<\/strong><\/td>0<\/strong><\/td><\/tr>
2<\/td>-1<\/strong><\/td>-1<\/strong><\/td>3<\/strong><\/td>1<\/strong><\/td><\/tr>
3<\/td>-1<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td>2<\/strong><\/td><\/tr>
4<\/td>6<\/strong><\/td>0<\/strong><\/td>5<\/strong><\/td>-1<\/strong><\/td><\/tr>
5<\/td>-1<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td>4<\/strong><\/td><\/tr>
6<\/td>-1<\/strong><\/td>4<\/strong><\/td>7<\/strong><\/td>-1<\/strong><\/td><\/tr>
7<\/td>8<\/strong><\/td>-1<\/strong><\/td>-1<\/strong><\/td>6<\/strong><\/td><\/tr>
8<\/td>9<\/strong><\/td>7<\/strong><\/td>-1<\/strong><\/td>6<\/strong><\/td><\/tr>
9<\/td>-1<\/strong><\/td>8<\/strong><\/td>-1<\/strong><\/td>6<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"
\u539f\u6587\u5730\u5740\uff1ahttps:\/\/blog.csdn.net\/vclearner2\/article\/details\/1…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":[],"categories":[29],"tags":[],"_links":{"self":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3149"}],"collection":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3149"}],"version-history":[{"count":8,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3149\/revisions"}],"predecessor-version":[{"id":3164,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3149\/revisions\/3164"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3149"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}