我正在尝试从.yaml文件加载矩阵,但opencv给出了以下错误:
OpenCV错误:解析错误(myFile.yaml(1):有效的xml应该以'开头) OpenCV错误:解析错误(myFile.yaml(1):标记应以'<'>未知函数开头)
这是我的写入存储文件,可以正常工作:
cv::FileStorage fs("myFile.yaml", cv::FileStorage::APPEND);
while(counter<_imgPtrVector.size()){
unsigned char* _pointer=(unsigned char*)_imgPtrVector.at(counter);
cv::Mat _matrixImage(cv::Size( width,height), CV_8UC1,_pointer , cv::Mat::AUTO_STEP);
fs <<"Matrix"<<_matrixImage;
counter++;
}
但是当我想从同一个文件加载数据时,我得到了这些错误;这是从存储文件中读取的代码:
cv::FileStorage f("myFile.yaml", cv::FileStorage::READ );
cv::Mat mat(cv::Size( width,height), CV_8UC1);
if(f.isOpened()){
cv::FileNode n = f["Matrix"];
if (n.type() != cv::FileNode::SEQ){
std::cout << "error!";
}
f["Matrix"] >> mat;
}
答案 0 :(得分:2)
问题可能是您始终追加到现有文件。因此,您可能需要将代码更改为:
FileStorage fs("test.yml", FileStorage::WRITE);
这将在每次程序运行时重新创建文件。
OpenCV文档在how to write上有一个示例,其中包含XML / YAML Persistence,非常清楚:
#include "opencv2/opencv.hpp"
#include <time.h>
using namespace cv;
int main(int, char** argv)
{
FileStorage fs("test.yml", FileStorage::WRITE);
fs << "frameCount" << 5;
time_t rawtime; time(&rawtime);
fs << "calibrationDate" << asctime(localtime(&rawtime));
Mat cameraMatrix = (Mat_<double>(3,3) << 1000, 0, 320, 0, 1000, 240, 0, 0, 1);
Mat distCoeffs = (Mat_<double>(5,1) << 0.1, 0.01, -0.001, 0, 0);
fs << "cameraMatrix" << cameraMatrix << "distCoeffs" << distCoeffs;
fs << "features" << "[";
for( int i = 0; i < 3; i++ )
{
int x = rand() % 640;
int y = rand() % 480;
uchar lbp = rand() % 256;
fs << "{:" << "x" << x << "y" << y << "lbp" << "[:";
for( int j = 0; j < 8; j++ )
fs << ((lbp >> j) & 1);
fs << "]" << "}";
}
fs << "]";
fs.release();
return 0;
}
还有另一个例子显示how to read。