// ************************* 程序 8-5 ****************************
/*** 程序功能：
    對圖像進行膨脹、腐蝕、開和閉運算

// ***************************************************************/


//
/*



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


IplImage *src = 0;
IplImage *image = 0;
IplImage *dest = 0;

IplConvKernel *element = 0;
const int element_shape = CV_SHAPE_RECT;

//全局變量，調整圖像膨脹腐蝕參數
int global_pos = 0;

//開運算 
void Opening ( int pos )
{
    element = cvCreateStructuringElementEx ( pos * 2 + 1, pos * 2 + 1, pos, pos, element_shape, 0 );
    cvErode ( src, image, element, 1 );
    cvDilate ( image, dest, element, 1 );
    cvReleaseStructuringElement ( &element );
    cvShowImage ( "Opening&Closing window", dest );
}   

//閉運算
void Closing ( int pos )
{
    element = cvCreateStructuringElementEx ( pos * 2 + 1, pos * 2 + 1, pos, pos, element_shape, 0 );
    cvDilate ( src, image, element, 1 );
    cvErode ( image, dest, element, 1 );
    cvReleaseStructuringElement ( &element );
    cvShowImage ( "Opening&Closing window", dest );
}

//腐蝕
void Erosion ( int pos )
{
    element = cvCreateStructuringElementEx ( pos * 2 + 1, pos * 2 + 1, pos, pos, element_shape, 0 );
    cvErode ( src, dest, element, 1 );
    cvReleaseStructuringElement ( &element );
    cvShowImage ( "Erosion&Dilation window", dest );
}

//膨脹
void Dilation ( int pos )
{
    element = cvCreateStructuringElementEx ( pos * 2 + 1, pos * 2 + 1, pos, pos, element_shape, 0 );
    cvDilate ( src, dest, element, 1 );
    cvReleaseStructuringElement ( &element );
    cvShowImage ( "Erosion&Dilation window", dest );
}


int main ( int argc, char **argv )
{
    char *filename = argc == 2 ? argv[1] : ( char * ) "test.jpg";
    if ( ( src = cvLoadImage ( filename, 1 ) ) == 0 )
    {
        return -1;
    }

    image = cvCloneImage ( src );
    dest = cvCloneImage ( src );

    //創建窗口
    cvNamedWindow ( "Opening&Closing window", 1 );
    cvNamedWindow ( "Erosion&Dilation window", 1 );

    cvShowImage ( "Opening&Closing window", src );
    cvShowImage ( "Erosion&Dilation window", src );

    //以函數名作為參數，trackbar調用函數，在函數中進行圖像處理，global_pos引用傳值當前滑塊位置到pos。
    cvCreateTrackbar ( "Open", "Opening&Closing window", &global_pos, 10, Opening );
    cvCreateTrackbar ( "Close", "Opening&Closing window", &global_pos, 10, Closing );
    cvCreateTrackbar ( "Dilate", "Erosion&Dilation window", &global_pos, 10, Dilation );
    cvCreateTrackbar ( "Erode", "Erosion&Dilation window", &global_pos, 10, Erosion );

    cvWaitKey ( 0 );
    //釋放圖像數據 
    cvReleaseImage ( &src );
    cvReleaseImage ( &image );
    cvReleaseImage ( &dest );
    //釋放窗口
    cvDestroyWindow ( "Opening&Closing window" ); 
    cvDestroyWindow ( "Erosion&Dilation window" ); 

    return 0;
}


  //*/