fixed documentation and warnings on Windows

modules/video/doc/motion_analysis_and_object_tracking.rst

@@ -673,21 +673,21 @@ BackgroundSubtractorMOG2::setShadowValue
 ---------------------------------------------
 Sets the shadow value
 
-.. ocv:function:: void BackgroundSubtractorMOG2::setShadowValue(int shadowValue)
+.. ocv:function:: void BackgroundSubtractorMOG2::setShadowValue(int value)
 
 BackgroundSubtractorMOG2::getShadowThreshold
 ---------------------------------------------
 Returns the shadow threshold
 
-.. ocv:function:: int BackgroundSubtractorMOG2::getShadowThreshold() const
+.. ocv:function:: double BackgroundSubtractorMOG2::getShadowThreshold() const
 
-A shadow is detected if the pixel is a darker version of the background. The shadow threshold (``Tau`` in the paper) is a threshold defining how much darker the shadow can be. ``Tau= 0.5`` means that if a pixel is more than twice darker then it is not shadow. See Prati, Mikic, Trivedi and Cucchiarra, *Detecting Moving Shadows...*, IEEE PAMI,2003.
+A shadow is detected if pixel is a darker version of the background. The shadow threshold (``Tau`` in the paper) is a threshold defining how much darker the shadow can be. ``Tau= 0.5`` means that if a pixel is more than twice darker then it is not shadow. See Prati, Mikic, Trivedi and Cucchiarra, *Detecting Moving Shadows...*, IEEE PAMI,2003.
 
 BackgroundSubtractorMOG2::setShadowThreshold
 ---------------------------------------------
 Sets the shadow threshold
 
-.. ocv:function:: void BackgroundSubtractorMOG2::setShadowThreshold(int shadowValue)
+.. ocv:function:: void BackgroundSubtractorMOG2::setShadowThreshold(double threshold)
 
 
 calcOpticalFlowSF

modules/video/include/opencv2/video/background_segm.hpp

@@ -108,13 +108,13 @@ class BackgroundSubtractorMOG2 : public BackgroundSubtractor
 {
 public:
     virtual int getHistory() const = 0;
-    virtual void setHistory(int nframes) = 0;
+    virtual void setHistory(int history) = 0;
 
     virtual int getNMixtures() const = 0;
-    virtual void setNMixtures(int nmix) = 0;
+    virtual void setNMixtures(int nmixtures) = 0;
 
     virtual double getBackgroundRatio() const = 0;
-    virtual void setBackgroundRatio(double backgroundRatio) = 0;
+    virtual void setBackgroundRatio(double ratio) = 0;
 
     virtual double getVarThreshold() const = 0;
     virtual void setVarThreshold(double varThreshold) = 0;
@@ -135,13 +135,13 @@ public:
     virtual void setComplexityReductionThreshold(double ct) = 0;
 
     virtual bool getDetectShadows() const = 0;
-    virtual void setDetectShadows(bool detectshadows) = 0;
+    virtual void setDetectShadows(bool detectShadows) = 0;
 
     virtual int getShadowValue() const = 0;
     virtual void setShadowValue(int value) = 0;
 
     virtual double getShadowThreshold() const = 0;
-    virtual void setShadowThreshold(double value) = 0;
+    virtual void setShadowThreshold(double threshold) = 0;
 };
 
 CV_EXPORTS Ptr<BackgroundSubtractorMOG2>

modules/video/src/bgfg_gaussmix2.cpp

@@ -245,7 +245,7 @@ public:
         << "varMax" << fVarMax
         << "complexityReductionThreshold" << fCT
         << "detectShadows" << (int)bShadowDetection
-        << "shadowValue" << nShadowDetection
+        << "shadowValue" << (int)nShadowDetection
         << "shadowThreshold" << fTau;
     }
 
@@ -262,7 +262,7 @@ public:
         fVarMax = (float)fn["varMax"];
         fCT = (float)fn["complexityReductionThreshold"];
         bShadowDetection = (int)fn["detectShadows"] != 0;
-        nShadowDetection = (int)fn["shadowValue"];
+        nShadowDetection = saturate_cast<uchar>((int)fn["shadowValue"]);
         fTau = (float)fn["shadowThreshold"];
     }