//均值滤波
int g_nBlurValue;
void on_ChangeBlurValue(int,void*)
{
if(g_nBlurValue>0)
{
blur(g_srcImage_Contrast,g_dstImage_Contrast,Size(g_nBlurValue,g_nBlurValue));
imshow("均值滤波",g_dstImage_Contrast);
}
}
void Test_Blur()
{
namedWindow("均值滤波");
namedWindow("原图");
g_srcImage_Contrast=imread("D:\\OpenCV Projects\\OpenCV_Test_Image\\16.jpg");
createTrackbar("blurtrackbar","均值滤波",&g_nBlurValue,10,on_ChangeBlurValue);
on_ChangeBlurValue(g_nBlurValue,0);
imshow("原图",g_srcImage_Contrast);
}

原文:http://www.cnblogs.com/foggia2004/p/6596784.html