samples/cpp/tutorial_code/ImgProc/Smoothing/Smoothing.cpp


Sample code for simple filters

Smoothing_Tutorial_Result_Median_Filter.jpg
Sample screenshot

Check the corresponding tutorial 了解更多细节

#include <iostream>
using namespace std ;
using namespace cv ;
int DELAY_CAPTION = 1500;
int DELAY_BLUR = 100;
int MAX_KERNEL_LENGTH = 31;
Mat src; Mat dst;
char window_name[] = "Smoothing Demo" ;
int display_caption( const char * caption );
int display_dst( int delay );
int main( int argc, char ** argv )
{
const char * filename = argc >=2 ? argv[1] : "lena.jpg" ;
if (src. empty ())
{
printf( " Error opening image\n" );
printf( " Usage:\n %s [image_name-- default lena.jpg] \n" , argv[0]);
return EXIT_FAILURE;
}
if ( display_caption( "Original Image" ) != 0 )
{
return 0;
}
dst = src. clone ();
if ( display_dst( DELAY_CAPTION ) != 0 )
{
return 0;
}
if ( display_caption( "Homogeneous Blur" ) != 0 )
{
return 0;
}
for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )
{
blur ( src, dst, Size ( i, i ), Point (-1,-1) );
if ( display_dst( DELAY_BLUR ) != 0 )
{
return 0;
}
}
if ( display_caption( "Gaussian Blur" ) != 0 )
{
return 0;
}
for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )
{
GaussianBlur ( src, dst, Size ( i, i ), 0, 0 );
if ( display_dst( DELAY_BLUR ) != 0 )
{
return 0;
}
}
if ( display_caption( "Median Blur" ) != 0 )
{
return 0;
}
for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )
{
medianBlur ( src, dst, i );
if ( display_dst( DELAY_BLUR ) != 0 )
{
return 0;
}
}
if ( display_caption( "Bilateral Blur" ) != 0 )
{
return 0;
}
for ( int i = 1; i < MAX_KERNEL_LENGTH; i = i + 2 )
{
bilateralFilter ( src, dst, i, i*2, i/2 );
if ( display_dst( DELAY_BLUR ) != 0 )
{
return 0;
}
}
display_caption( "Done!" );
return 0;
}
int display_caption( const char * caption )
{
dst = Mat::zeros( src. size (), src. type () );
putText ( dst, caption,
Point ( src. cols /4, src. rows /2),
FONT_HERSHEY_COMPLEX , 1, Scalar (255, 255, 255) );
return display_dst(DELAY_CAPTION);
}
int display_dst( int delay )
{
imshow ( window_name, dst );
int c = waitKey ( delay );
if ( c >= 0 ) { return -1; }
return 0;
}