有没有办法使用
cv::Mat
对象初始化 opencv vector<float>
?
或者我是否需要循环遍历向量的每个条目并将其写入 cv::Mat
对象?
我写了下面的测试代码(包括@Miki的评论)给自己详细理解。
你测试一下就明白了。
#include <opencv2/highgui.hpp>
#include <iostream>
using namespace cv;
using namespace std;
int main(int argc, char* argv[])
{
vector<float> vec{0.1,0.9,0.2,0.8,0.3,0.7,0.4,0.6,0.5,1};
Mat m1( vec );
imshow("m1",m1);
waitKey();
Mat m2( 1,vec.size(), CV_32FC1,vec.data());
imshow("m2",m2);
waitKey();
Mat1f m3( vec.size(), 1, vec.data());
imshow("m3",m3);
waitKey();
Mat1f m4( 1, vec.size(), vec.data());
imshow("m4",m4);
waitKey();
cout << "as seen below all Mat and vector use same data" << endl;
cout << vec[0] << endl;
m1 *= 2;
cout << vec[0] << endl;
m2 *= 2;
cout << vec[0] << endl;
m3 *= 2;
cout << vec[0] << endl;
m4 *= 2;
cout << vec[0] << endl;
return 0;
}
OpenCv 支持 std::vector -> cv::Mat 映射有或没有副本。 它在文档中!
template<typename _Tp >
cv::Mat::Mat(const std::vector< _Tp > & vec, bool copyData = false);
示例:
vector<float> image(100); // vector with 100 floats (could be any supported types)
cv::Mat cv_image{image, false};
接下来,您可以根据给定的行数和通道数重塑结果图像:
int desired_rows = 10;
int desired_channels = 1;
cv_image = cv_image.reshape(desired_channels, desired_rows);