[置顶]opencv图像处理3--opencv下使用滑动条

#include "cv.h"
#include "highgui.h"
#include <stdio.h>
#include <ctype.h>


void on_trackbar(int position){


if( position == 0 ) {
printf("the position is%d", position);
} else {
printf("the position is %d", position);
  }
}


int main(){


IplImage* pImg; //声明IplImage指针

    //载入图像
    if( (pImg = cvLoadImage("1.bmp")) != 0 )
    {
int value = 100;
int count = 200;
        cvNamedWindow( "Image", 0);//创建窗口

cvCreateTrackbar("hello", "Image",&value,count,on_trackbar);
int my_position = cvGetTrackbarPos("hello","Image");
//cvWaitKey(0); //等待按键



on_trackbar(my_position);

         cvShowImage( "Image", pImg );//显示图像

        cvWaitKey(0); //等待按键

 

        cvDestroyWindow( "Image" );//销毁窗口
        cvReleaseImage( &pImg ); //释放图像
      
    }

    return 0;


}