find contour
寻找轮廓线是基于图像边缘提取的基础寻找对象轮廓的方法。所以边缘提取的阈值选定会影响最终轮廓寻找的结果。
相关参数:https://blog.youkuaiyun.com/dcrmg/article/details/51987348
相关API:
findContours; drawContours
步骤:
1、图像转灰度cvtColor
2、Canny边缘提取,得到二值图像
3、使用findConturs寻找轮廓
4、drawContours绘制轮廓、
#include<opencv2/opencv.hpp>
#include<iostream>
#include<string>
#include<vector>
using namespace cv;
using namespace std;
int threshold_value = 100;
int threshold_max = 255;
RNG rng;
void Demo_Contours(int, void*);
const String output_window = "Output window";
Mat src,dst;
int main(int argv, char**argc) {
src = imread("C:\\Users\\admin\\Desktop\\demo.jpg");
if (src.empty())
{
printf("Could not load the demo image...");
return false;
}
namedWindow("Source pic", CV_WINDOW_AUTOSIZE);
imshow("Source pic", src);
cvtColor(src, dst,