A Simple Transformation

// If the resource is not from bitmap file but from avi file, then each frame of the output
// will up-side down, I still not find out what reason.

// Example 2-4. Loading and then smoothing an image before it is displayed on the screen

#include "cv.h"
#include "highgui.h"

void example2_4( IplImage *);

int main(int argc,char **argv)
{
　IplImage *image = cvLoadImage( argv[1] );
　example2_4( image );
　cvReleaseImage( &image );
　return 0;
}

void example2_4( IplImage *image )
{
　// Create some windows to show the input
　// and output image in.
　//
　cvNamedWindow( "Example4-in" );
　cvNamedWindow( "Example4-out" );

　// Create a window to show our input image
　//
　cvShowImage( "Example4-in" , image );

　// Create an image to hold the smoothed output
　//
　IplImage *out = cvCreateImage( cvGetSize(image) , IPL_DEPTH_8U , 3 );

　// Do the smoothing
　//
　cvSmooth( image , out , CV_GAUSSIAN , 31 , 31);

　// Show the smoothed image in the output window
　//
　cvShowImage( "Example4-out" , out );

　//Be tidy
　//
　cvReleaseImage( &out );

　// Wait for the user to hit a key, then clean up the windows
　//
　cvWaitKey( 0 );
　cvDestroyWindow( "Example4-in" );
　cvDestroyWindow( "Example4-out" );
}