标签：src opencv parser filename cpp 例子 i++ empty div
yaml写法的简单例子。将 $ ./ 1 2 3 4 5 命令的参数（代表图片地址）写入yaml中。
写yaml文件。
参考：[OpenCV] Samples 06: [ML] logistic regression 读xml文件。
{ /* * Jeff --> Load xml. * transform to Mat. * FileStorage. */ cout << "loading the dataset..."; // Step 1. FileStorage f; if(f.open(filename, FileStorage::READ)) { // Step 2. f["datamat"] >> data; f["labelsmat"] >> labels; f.release(); } else { cerr << "file can not be opened: " << filename << endl; return 1; } // Step 3. data.convertTo(data, CV_32F); labels.convertTo(labels, CV_32F); cout << "read " << data.rows << " rows of data" << endl; }
/*this creates a yaml or xml list of files from the command line args
*/
#include "opencv2/core/core.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/highgui/highgui.hpp"
#include <string>
#include <iostream>
using std::string;
using std::cout;
using std::endl;
using namespace cv;
static void help(char** av)
{
cout << "\nThis creates a yaml or xml list of files from the command line args\n"
"usage:\n./" << av[0] << " imagelist.yaml *.png\n"
<< "Try using different extensions.(e.g. yaml yml xml xml.gz etc...)\n"
<< "This will serialize this list of images or whatever with opencv‘s FileStorage framework" << endl;
}
int main(int ac, char** av)
{
cv::CommandLineParser parser(ac, av, "{help h||}{@output||}");
if (parser.has("help"))
{
help(av);
return 0;
}
string outputname = parser.get<string>("@output");
cout << "{yaml} outputname = " << outputname << endl;
if (outputname.empty())
{
help(av);
return 1;
}
Mat m = imread(outputname); //check if the output is an image - prevent overwrites!
if(!m.empty()){
std::cerr << "fail! Please specify an output file, don‘t want to overwrite you images!" << endl;
help(av);
return 1;
}
//Jeff --> write into outputname.
FileStorage fs(outputname, FileStorage::WRITE);
fs << "images" << "[";
for(int i = 2; i < ac; i++){
//Jeff --> write by "<<", redirection to file stream.
fs << string(av[i]);
}
fs << "]";
return 0;
}
[OpenCV] Samples 10: imagelist_creator
标签：src opencv parser filename cpp 例子 i++ empty div
原文地址：http://www.cnblogs.com/jesse123/p/6121448.html
