#include "opencv2/imgproc/imgproc.hpp"

 #include "opencv2/highgui/highgui.hpp"

 using namespace std;

 using namespace cv;

 /// 全局变量

 int DELAY_CAPTION = ;

 int DELAY_BLUR = ;

 int MAX_KERNEL_LENGTH = ;

 Mat src; Mat dst;

 char window_name[] = "Filter Demo 1";

 /// 函数申明

 int display_caption( char* caption );

 int display_dst( int delay );

 /**

  *  main 函数

  */

  int main( int argc, char** argv )

  {

    namedWindow( window_name, CV_WINDOW_AUTOSIZE );

    /// 载入原图像

    src = imread( "../images/lena.jpg",  );

    if( display_caption( "Original Image" ) !=  ) { return ; }

    dst = src.clone();

    if( display_dst( DELAY_CAPTION ) !=  ) { return ; }

    /// 使用 均值平滑

    if( display_caption( "Homogeneous Blur" ) !=  ) { return ; }

    for ( int i = ; i < MAX_KERNEL_LENGTH; i = i +  )

        { blur( src, dst, Size( i, i ), Point(-,-) );

          if( display_dst( DELAY_BLUR ) !=  ) { return ; } }

     /// 使用高斯平滑

     if( display_caption( "Gaussian Blur" ) !=  ) { return ; }

     for ( int i = ; i < MAX_KERNEL_LENGTH; i = i +  )

         { GaussianBlur( src, dst, Size( i, i ), ,  );

           if( display_dst( DELAY_BLUR ) !=  ) { return ; } }

      /// 使用中值平滑

      if( display_caption( "Median Blur" ) !=  ) { return ; }

      for ( int i = ; i < MAX_KERNEL_LENGTH; i = i +  )

          { medianBlur ( src, dst, i );

            if( display_dst( DELAY_BLUR ) !=  ) { return ; } }

      /// 使用双边平滑

      if( display_caption( "Bilateral Blur" ) !=  ) { return ; }

      for ( int i = ; i < MAX_KERNEL_LENGTH; i = i +  )

          { bilateralFilter ( src, dst, i, i*, i/ );

            if( display_dst( DELAY_BLUR ) !=  ) { return ; } }

      /// 等待用户输入

      display_caption( "End: Press a key!" );

      waitKey();

      return ;

  }

  int display_caption( char* caption )

  {

    dst = Mat::zeros( src.size(), src.type() );

    putText( dst, caption,

             Point( src.cols/, src.rows/),

             CV_FONT_HERSHEY_COMPLEX, , Scalar(, , ) );

    imshow( window_name, dst );

    int c = waitKey( DELAY_CAPTION );

    if( c >=  ) { return -; }

    return ;

   }

   int display_dst( int delay )

   {

     imshow( window_name, dst );

     int c = waitKey ( delay );

     if( c >=  ) { return -; }

     return ;

   }