added c++ interface for cvPyrMeanShiftFiltering; added sample on meanshift segmentation

samples/cpp/meanshift_segmentation.cpp

@@ -0,0 +1,66 @@
+#include <highgui.h>
+#include "opencv2/core/core.hpp"
+#include "opencv2/imgproc/imgproc.hpp"
+#include <iostream>
+
+using namespace cv;
+using namespace std;
+
+void floodFillPostprocess( Mat& img, const Scalar& colorDiff=Scalar::all(1) )
+{
+    CV_Assert( !img.empty() );
+    RNG rng = theRNG();
+    Mat mask( img.rows+2, img.cols+2, CV_8UC1, Scalar::all(0) );
+    for( int y = 0; y < img.rows; y++ )
+    {
+        for( int x = 0; x < img.cols; x++ )
+        {
+            if( mask.at<uchar>(y+1, x+1) == 0 )
+            {
+                Scalar newVal( rng(256), rng(256), rng(256) );
+                floodFill( img, mask, Point(x,y), newVal, 0, colorDiff, colorDiff );
+            }
+        }
+    }
+}
+
+string winName = "meanshift";
+int spatialRad, colorRad, maxPyrLevel;
+Mat img, res;
+
+void meanShiftSegmentation( int, void* )
+{
+    cout << "spatialRad=" << spatialRad << "; "
+         << "colorRad=" << colorRad << "; "
+         << "maxPyrLevel=" << maxPyrLevel << endl;
+    pyrMeanShiftFiltering( img, res, spatialRad, colorRad, maxPyrLevel );
+    floodFillPostprocess( res, Scalar::all(2) );
+    imshow( winName, res );
+}
+
+int main(int argc, char** argv)
+{
+    if( argc !=2 )
+    {
+        cout << "Format:" << endl << argv[0] << " image" << endl;
+        return -1;
+    }
+
+    img = imread( argv[1] );
+    if( img.empty() )
+        return -1;
+
+    spatialRad = 10;
+    colorRad = 10;
+    maxPyrLevel = 1;
+
+    namedWindow( winName, CV_WINDOW_AUTOSIZE );
+
+    createTrackbar( "spatialRad", winName, &spatialRad, 80, meanShiftSegmentation );
+    createTrackbar( "colorRad", winName, &colorRad, 60, meanShiftSegmentation );
+    createTrackbar( "maxPyrLevel", winName, &maxPyrLevel, 5, meanShiftSegmentation );
+
+    meanShiftSegmentation(0, 0);
+    waitKey();
+    return 0;
+}