Fix spelling typos

backport commit 659ffaddb4

modules/video/src/bgfg_KNN.cpp

@@ -110,7 +110,7 @@ public:
     //set parameters
     // N - the number of samples stored in memory per model
     nN = defaultNsamples;
-    //kNN - k nearest neighbour - number on NN for detcting background - default K=[0.1*nN]
+    //kNN - k nearest neighbour - number on NN for detecting background - default K=[0.1*nN]
     nkNN=MAX(1,cvRound(0.1*nN*3+0.40));
 
     //Tb - Threshold Tb*kernelwidth
@@ -292,7 +292,7 @@ protected:
     //less important parameters - things you might change but be careful
     ////////////////////////
     int nN;//totlal number of samples
-    int nkNN;//number on NN for detcting background - default K=[0.1*nN]
+    int nkNN;//number on NN for detecting background - default K=[0.1*nN]
 
     //shadow detection parameters
     bool bShadowDetection;//default 1 - do shadow detection

modules/video/src/bgfg_gaussmix2.cpp

@@ -181,7 +181,7 @@ public:
     //! computes a background image which are the mean of all background gaussians
     virtual void getBackgroundImage(OutputArray backgroundImage) const CV_OVERRIDE;
 
-    //! re-initiaization method
+    //! re-initialization method
     void initialize(Size _frameSize, int _frameType)
     {
         frameSize = _frameSize;