I am newbie in OpenCV, so I don't know can I ask this kind of question here or not?
I like to draw a sequence of points as a line on OpenCV3.3.0. I think I can collect this sequence by "vector<point>" although I don't know is this the best idea or not?
Lets consider I have these points vector:
vector<Point> vec = { Point(0,0),Point(10,10),Point(20,20), Point(30,30), Point(40,40), Point(50,50) };
And like to draw them in an empty Mat as an 50*50 pixel image. So it would be the images diameter. But I don't know how can I do this? I searched and found the "line" function, but it has only to "starting and end" points. should I use many line functions in sequence? there isn't better solution for this?
I tried to do it by this code but it thrown in an exception:
#include <opencv2/opencv.hpp>
#include <iostream>
using namespace std;
using namespace cv;
void MyLine(Mat img, Point start, Point end);
Mat im = Mat::zeros(100, 100, CV_8UC1);
Mat img = Mat::zeros(100, 100, CV_8UC1);
vector<Point> vec = { Point(0,0),Point(10,10),Point(20,20), Point(30,30), Point(40,40), Point(50,50) };
int main()
{
Point start= Point(0, 0);
Point end = Point(50, 50);
MyLine(img, start, end);
namedWindow("image", WINDOW_AUTOSIZE);
imshow("image", im);
waitKey(0);
return 0;
}
void MyLine(Mat img, Point start, Point end)
{
int thickness = 2;
int lineType = 8;
for (int i = 0; i < 7; i++)
{
line(img,
vec[i],
vec[i+1],
Scalar(255, 255, 255),
thickness,
lineType);
im += img;
}
}
