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我很难在C++中使用OpenCV将矩阵的子集复制到另一个更大的矩阵中。将矩阵复制到另一个矩阵的子集
我尝试下面的代码:
#include <opencv2/opencv.hpp>
void printMatrix(const cv::Mat &M, std::string matrix)
{
printf("Matrix \"%s\" is %i x %i\n", matrix.c_str(), M.rows, M.cols);
std::cout << M << std::endl;
}
int main(int argc, char ** argv)
{
cv::Mat P0(3, 4, CV_32F);
printMatrix(P0, "P0 Initial");
cv::Mat R0 = cv::Mat::eye(3,3,CV_32F);
printMatrix(R0, "R0 I");
R0.copyTo(P0.colRange(0,2));
printMatrix(P0, "P0 with R");
return 0;
}
将会产生以下的输出:
Matrix "P0 Initial" is 3 x 4
[-4.3160208e+008, -4.3160208e+008, -4.3160208e+008, -4.3160208e+008;
-4.3160208e+008, -4.3160208e+008, -4.3160208e+008, -4.3160208e+008;
-4.3160208e+008, -4.3160208e+008, -4.3160208e+008, -4.3160208e+008]
Matrix "R0 I" is 3 x 3
[1, 0, 0;
0, 1, 0;
0, 0, 1]
Matrix "P0 with R" is 3 x 4
[-4.3160208e+008, -4.3160208e+008, -4.3160208e+008, -4.3160208e+008;
-4.3160208e+008, -4.3160208e+008, -4.3160208e+008, -4.3160208e+008;
-4.3160208e+008, -4.3160208e+008, -4.3160208e+008, -4.3160208e+008]
虽然表明复制操作没有做任何事情。
我发现了一个类似的帖子here,但是根据该帖子中的建议将相关行更新为以下内容仍然会产生相同的输出。
//R0.copyTo(P0.colRange(0,2));
cv::Mat dest = P0.colRange(0,2);
printMatrix(P0, "P0 with R");
谢谢你,我明白我现在要去哪里错了! – Chris