我编写了一个在单通道空白图像中绘制圆形、直线和矩形的代码。之后,我只需找出图像中的轮廓,就可以正确获取所有轮廓。但找到轮廓后,我的源图像变得扭曲。为什么会出现这种情况?任何人都可以帮我解决这个问题。我的代码如下所示。
using namespace cv;
using namespace std;
int main()
{
Mat dst = Mat::zeros(480, 480, CV_8UC1);
Mat draw= Mat::zeros(480, 480, CV_8UC1);
line(draw, Point(100,100), Point(150,150), Scalar(255,0,0),1,8,0);
rectangle(draw, Rect(200,300,10,15), Scalar(255,0,0),1, 8,0);
circle(draw, Point(80,80),20, Scalar(255,0,0),1,8,0);
vector<vector<Point> > contours;
vector<Vec4i> hierarchy;
findContours( draw, contours, hierarchy,CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE );
for( int i = 0; i< contours.size(); i++ )
{
Scalar color( 255,255,255);
drawContours( dst, contours, i, color, 1, 8, hierarchy );
}
imshow( "Components", dst );
imshow( "draw", draw );
waitKey(0);
}
源图片
Distorted source after finding contour