04 邊緣(Canny)

04 邊緣(Canny)

screen-shot-2016-11-14-at-12-58-39-am

找邊緣(Canny)

Canny邊緣檢測,在抗雜訊和精確定位間有不錯的效果,OpenCV提供Canny()函式,來進行Canny邊緣檢測,以下為流程,OpenCV已將步驟封裝好,使用時只要呼叫Canny()即可。

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#include <iostream>
#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/opencv.hpp>

using namespace cv ;
using namespace std ;

int main() {
cv::Mat src = cv::imread("/Users/powenko/Desktop/1.png");
if(src.data!=NULL){

GaussianBlur(src, src, Size(3,3), 0, 0);
Mat dst1, dst2;
Canny(src, dst1, 50, 150, 3);
threshold(dst1, dst2, 128, 255, THRESH_BINARY_INV); //反轉影像
cv::namedWindow("Image") ;
cv::imshow("Image", src) ;
cv::imshow("Powenko.com result 1", dst1) ;
cv::imshow("Powenko.com result 2", dst2) ;
cv::waitKey() ;
}
return 0;
}

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OpenCV
CH01 簡介CH02 OpenCV APICH03 繪圖CH04 應用範例CH06 haarcascadesCH06 surf和siftCH07 OCRCH09 FaceCH5 輪廓(findContours、drawContours)