使用CSV文件去读图像和标签

//使用CSV文件去读图像和标签，主要使用stringstream和getline方法
staticvoid read_csv(const string& filename, vector<Mat>& images, vector<int>& labels, char separator =';') {
std::ifstream file(filename.c_str(), ifstream::in);
if (!file) {
string error_message ="No valid input file was given, please check the given filename.";
CV_Error(CV_StsBadArg, error_message);
}
string line, path, classlabel;
while (getline(file, line)) {
stringstream liness(line);
getline(liness, path, separator);
getline(liness, classlabel);
if(!path.empty()&&!classlabel.empty()) {
images.push_back(imread(path, 0));
labels.push_back(atoi(classlabel.c_str()));
}
}
}