{"id":9077,"date":"2016-11-13T11:26:23","date_gmt":"2016-11-13T16:26:23","guid":{"rendered":"httpss:\/\/www.powenko.com\/wordpress\/?p=9077"},"modified":"2016-11-13T12:04:11","modified_gmt":"2016-11-13T17:04:11","slug":"01-%e6%89%be%e8%bc%aa%e5%bb%93","status":"publish","type":"post","link":"https:\/\/www.powenko.com\/wordpress\/?p=9077","title":{"rendered":"01 \u627e\u8f2a\u5ed3"},"content":{"rendered":"

\u8f2a\u5ed3(findContours\u3001drawContours)<\/p>\n

\u7576\u6211\u5011\u505a\u7269\u4ef6\u8fa8\u8b58\u6642\uff0c\u900f\u904e\u8f2a\u5ed3\u53ef\u5f97\u5230\u7279\u5b9a\u7269\u4ef6\u7684\u8cc7\u8a0a\uff0c\u5354\u52a9\u6211\u5011\u505a\u5224\u65b7\uff0cOpenCV\u7684findContours()\u51fd\u5f0f\u53ef\u627e\u5230\u5f71\u50cf\u7684\u8f2a\u5ed3\uff0c\u4f9d\u5be6\u969b\u9700\u6c42\u8abf\u6574\u53c3\u6578\u8f38\u5165\uff0c\u800c\u9019\u908a\u7684\u8f2a\u5ed3\u548cSobel\u9019\u4e9b\u627e\u908a\u7de3\u7684\u8655\u7406\u4e0d\u540c\uff0cSobel\u662f\u5c07\u7269\u4ef6\u5167\u90e8\u6d88\u9664\uff0c\u53ea\u4fdd\u7559\u7269\u4ef6\u908a\u7de3\uff0cfindContours\u662f\u5728\u7d93\u904eSobel\u8655\u7406\u4e4b\u5f8c\uff0c\u5c07\u9019\u500b\u53ea\u6709\u908a\u7de3\u7684\u5f71\u50cf\uff0c\u628a\u5404\u500b\u908a\u7de3\u9ede\u505a\u5206\u985e\uff0c\u9023\u7d50\u7684\u908a\u7de3\u9ede\u5132\u5b58\u5728\u540c\u500b\u5bb9\u5668\u5167\uff0c\u7576\u6211\u5011\u627e\u5230\u8f2a\u5ed3\u5f8c\uff0c\u53ef\u7528drawContours()\u5283\u51fa\u8f2a\u5ed3\u7dda\uff0c\u6aa2\u67e5\u662f\u5426\u53d6\u5f97\u6b63\u78ba\u6216\u9069\u5408\u7684\u8f2a\u5ed3\u3002<\/p>\n

\"screen-shot-2016-11-14-at-12-50-45-am\"<\/a><\/p>\n

\r\n#include <iostream>\r\n#include <opencv2\/core\/core.hpp> \r\n#include <opencv2\/highgui\/highgui.hpp>\r\n#include <opencv2\/opencv.hpp>\r\n\r\nusing namespace cv ;\r\nusing namespace std ;\r\n\r\nint main() {\r\n    cv::Mat src = cv::imread("\/Users\/powenko\/Desktop\/1.png");\r\n    if(src.data!=NULL){\r\n        \r\n        Mat src_gray = imread("\/Users\/powenko\/Desktop\/1.png", CV_LOAD_IMAGE_GRAYSCALE);\r\n        Mat contoursImg = src.clone();\r\n        Mat edge;\r\n        blur(src_gray, src_gray, Size(3,3));\r\n        Canny(src_gray, edge, 50, 150, 3);\r\n        \r\n        vector<vector<Point>> contours;\r\n        vector<Vec4i> hierarchy;\r\n        RNG rng(12345);\r\n        findContours(edge, contours, hierarchy, CV_RETR_TREE, CV_CHAIN_APPROX_NONE);\r\n        for(int i = 0; i<contours.size(); i++){\r\n            Scalar color = Scalar( rng.uniform(0, 255), rng.uniform(0, 255), 255);\r\n            drawContours(contoursImg, contours, i, color, 2, 8, hierarchy);\r\n        }\r\n        \r\n        cv::namedWindow("Image") ;\r\n        cv::imshow("Image", src) ;\r\n        cv::imshow("Powenko.com  result", contoursImg) ;\r\n        cv::waitKey() ;\r\n    }\r\n    return 0;\r\n}\r\n\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u8f2a\u5ed3(findContours\u3001drawContours) \u7576\u6211\u5011\u505a\u7269\u4ef6\u8fa8\u8b58\u6642\uff0c\u900f\u904e\u8f2a\u5ed3\u53ef\u5f97\u5230\u7279\u5b9a\u7269\u4ef6\u7684\u8cc7\u8a0a\uff0c […]<\/p>\n","protected":false},"author":1,"featured_media":9088,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[335],"tags":[],"class_list":["post-9077","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ch5-findcontoursdrawcontours"],"_links":{"self":[{"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9077"}],"collection":[{"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9077"}],"version-history":[{"count":4,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9077\/revisions"}],"predecessor-version":[{"id":9093,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/9077\/revisions\/9093"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/media\/9088"}],"wp:attachment":[{"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9077"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9077"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9077"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}