如何从OpenCV中的XML字符串中读取？

I know how to load/save a cv::Mat instance into a XML-file (See this question).

我知道如何将cv :: Mat实例加载/保存到XML文件中（请参阅此问题）。

But what I really need, is to parse a std::string (or char *) that contains the XML, and get the cv::Mat. Say I get the XML out of a database, and not from a file.

但我真正需要的是解析包含XML的std :: string（或char *），并获取cv :: Mat。假设我从数据库中获取XML，而不是从文件中获取XML。

Is that possible?

那可能吗？

1 个解决方案

#1

You can do it since OpenCV 2.4.1.

你可以从OpenCV 2.4.1开始。

Here is a code sample from release notes:

以下是发行说明中的代码示例：

//==== storing data ====
FileStorage fs(".xml", FileStorage::WRITE + FileStorage::MEMORY);
fs << "date" << date_string << "mymatrix" << mymatrix;
string buf = fs.releaseAndGetString();

//==== reading it back ====
FileStorage fs(buf, FileStorage::READ + FileStorage::MEMORY);
fs["date"] >> date_string;
fs["mymatrix"] >> mymatrix;

#1