opencv
opencv中Mat存在各种类型，其中mat有一个type（）的函数可以返回该Mat的类型。类型表示了矩阵中元素的类型以及矩阵的通道个数，它是一系列的预定义的常量，其命名规则为CV_(位数）+（数据类型）+（通道数）。具体的有以下值：
err:
OpenCV Error: Assertion failed (type == B.type()) in gemm, file /home/nvidia/build-opencv/opencv/modules/core/src/matmul.cpp, line
terminate called after throwing an instance of 'cv::Exception'
what(): /home/nvidia/build-opencv/opencv/modules/core/src/matmul.cpp:: error: (-) type == B.type() in function gemm Aborted (core dumped)
code:
cv::Mat rot_tmp;
rot.convertTo(rot_tmp, CV_32FC1);
cv::Mat P = (cv::Mat_<float>(,) <<
, lineL, , ,
, , -lineL, ,
, , , -lineL);
std::cout << "rot.type: " << rot.type()<< std::endl;
std::cout << "rot_tmp.type: " << rot_tmp.type()<< std::endl;
std::cout << "P.type: " << P.type()<< std::endl;
P = rot_tmp.rowRange(,)*P;
cankao
1.
https://blog.****.net/jeffdeen/article/details/52401526
2.
opencv-mat
https://docs.opencv.org/3.1.0/d3/d63/classcv_1_1Mat.html
wan