对不起我的英语:) 试图改进我的应用程序我想将向量直接复制到没有字符串的 mysql 中,这甚至可能吗?
FileStorage fs( ".yml", FileStorage::WRITE + FileStorage::MEMORY );
Ptr < FaceRecognizer > model0 = createmyfisherRecognizer();
model0->train( images, labels );
model0->save( fs );
void myfisher::save( FileStorage & fs ) const {
static char * host = "localhost"; /* host serwera MySQL */
static char * user = "root"; /* nazwa loginu by polaczyc sie do serwera */
static char * password = ""; /* haslo */
static char * sql_db = "fisher"; /* nazwa bazy */
static unsigned int sql_port = NULL; /* port na jakim odbiera/wysyla serwer mysql */
static char * opt_socket = NULL; /* socket name */
static unsigned int sql_flags = 0;
static MYSQL * sock; /* Wskaznik do polaczenia do MySQL */
sock = mysql_init( NULL );
if( mysql_real_connect( sock, host, user, password, sql_db, sql_port, opt_socket, sql_flags ) )
cout << "Poprawnie polaczyles sie z baza danych" << endl;
else
cout << "Blad w polaczeniu z baza danych" << endl;
fs << "num_components" << _num_components;
fs << "mean" << _mean;
fs << "eigenvalues" << _eigenvalues;
writeFileNodeList( fs, "projections", _projections );
fs << "labels" << _labels;
string buf = fs.releaseAndGetString();
fs.release();
string zapytanie = "insert into baa values (\"" + buf + "\")";
if( !mysql_query( sock, zapytanie.c_str() ) )
cout << "Poprawnie dodano" << endl;
else
cout << "Blad przy zapisywaniu" << endl;
}
在这里,我发布了有问题的代码。目前它以这种方式工作:
- 一切都保存到 fs (FileStorage)
- fs 中的数据转换为字符串
- fs 发送到数据库 众所周知,如果不带字符串直接将程序复制到数据库,程序运行速度会快得多。