Refactored videostab module and sample

modules/videostab/include/opencv2/videostab/deblurring.hpp

@@ -72,8 +72,6 @@ public:
     virtual void setBlurrinessRates(const std::vector<float> &val) { blurrinessRates_ = &val; }
     virtual const std::vector<float>& blurrinessRates() const { return *blurrinessRates_; }
 
-    virtual void update() {}
-
     virtual void deblur(int idx, Mat &frame) = 0;
 
 protected:

modules/videostab/include/opencv2/videostab/global_motion.hpp

@@ -72,6 +72,7 @@ struct CV_EXPORTS RansacParams
     float eps; // max outliers ratio
     float prob; // probability of success
 
+    RansacParams() : size(0), thresh(0), eps(0), prob(0) {}
     RansacParams(int size, float thresh, float eps, float prob)
         : size(size), thresh(thresh), eps(eps), prob(prob) {}
 

modules/videostab/include/opencv2/videostab/inpainting.hpp

@@ -78,8 +78,6 @@ public:
     virtual void setStabilizationMotions(const std::vector<Mat> &val) { stabilizationMotions_ = &val; }
     virtual const std::vector<Mat>& stabilizationMotions() const { return *stabilizationMotions_; }
 
-    virtual void update() {}
-
     virtual void inpaint(int idx, Mat &frame, Mat &mask) = 0;
 
 protected:
@@ -108,8 +106,6 @@ public:
     virtual void setStabilizedFrames(const std::vector<Mat> &val);
     virtual void setStabilizationMotions(const std::vector<Mat> &val);
 
-    virtual void update();
-
     virtual void inpaint(int idx, Mat &frame, Mat &mask);
 
 private:

modules/videostab/include/opencv2/videostab/motion_stabilizing.hpp

@@ -79,6 +79,12 @@ class CV_EXPORTS GaussianMotionFilter : public MotionFilterBase
 {
 public:
     GaussianMotionFilter() : stdev_(-1.f) {}
+    GaussianMotionFilter(int radius, float stdev = -1.f)
+    {
+        setRadius(radius);
+        setStdev(stdev);
+        update();
+    }
 
     void setStdev(float val) { stdev_ = val; }
     float stdev() const { return stdev_; }

modules/videostab/include/opencv2/videostab/stabilizer.hpp

@@ -160,7 +160,7 @@ public:
     void setEstimateTrimRatio(bool val) { mustEstTrimRatio_ = val; }
     bool mustEstimateTrimaRatio() const { return mustEstTrimRatio_; }
 
-    virtual void reset() { resetImpl(); }
+    virtual void reset();
     virtual Mat nextFrame();
 
     // available after pre-pass, before it's empty