From a1e04c98aa40915b5da23544f7f99824b15ed8ce Mon Sep 17 00:00:00 2001
From: TobyWanKenobi <asragoth@gmail.com>
Date: Tue, 2 Dec 2014 15:15:06 +0100
Subject: [PATCH] Add method in StatModel class, to load from String

Added a method "loadFromString" which is based on the "load" one. It
allow to directly pass the XML string which can be usefull and faster
when you have a huge file in a variable.
---
 modules/ml/include/opencv2/ml.hpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/modules/ml/include/opencv2/ml.hpp b/modules/ml/include/opencv2/ml.hpp
index 5e633c4d0a..63a29c80e5 100644
--- a/modules/ml/include/opencv2/ml.hpp
+++ b/modules/ml/include/opencv2/ml.hpp
@@ -827,6 +827,22 @@ public:
         return model->isTrained() ? model : Ptr<_Tp>();
     }
 
+    /** @brief Loads model from an XML String
+
+    This is static template method of StatModel. It's usage is following (in the case of SVM): :
+
+        Ptr<SVM> svm = StatModel::loadFromString<SVM>(myXMLStringModel);
+
+    @param strModel The string variable containing the model (in an XML format) you want to load.
+     */
+    template<typename _Tp> static Ptr<_Tp> loadFromString(const String& strModel)
+	{
+		FileStorage fs(strModel, FileStorage::READ + FileStorage::MEMORY + FileStorage::FORMAT_XML);
+		Ptr<_Tp> model = _Tp::create();
+		model->read(fs.getFirstTopLevelNode());
+		return model->isTrained() ? model : Ptr<_Tp>();
+	}
+    
     template<typename _Tp> static Ptr<_Tp> train(const Ptr<TrainData>& data, const typename _Tp::Params& p, int flags=0)
     {
         Ptr<_Tp> model = _Tp::create(p);
@@ -1511,6 +1527,7 @@ public:
     };
 
     /** @brief The class represents a decision tree node. It has public members:
+
     -   member double value
     Value at the node: a class label in case of classification or estimated function value in case
     of regression.