Source code to Closing Holes Leaf Image

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Please help me. First, this is original/source picture. (Picture 1)

with canny and morphology, I processing picture from that original picture like this (Picture 2) :

And now, I want to process the image so that it looks like this (Picture 3) :

But I don't know how to make them into images like that (Picture 3). Plese help me. Can you give me the source code to make it like Picture 3 ?

This is my source code (Convert Picture 1 to Picture 2) :

//Area_Daun.cpp : main project file.

#include "stdafx.h"
#include "cxcore.h"
#include "highgui.h"
#include "cv.h"
#include "stdio.h"

using namespace System;

int main()
{
    IplImage* img = NULL;
    IplImage* OpenImg = NULL;

    // load original image
    img = cvLoadImage("kubis2.jpg");

    IplImage* newImg = cvCreateImage (cvGetSize(img), IPL_DEPTH_8U,1);
    IplImage* newImg1 = cvCreateImage (cvGetSize(img), IPL_DEPTH_8U,1);
    IplImage* newImg2 = cvCreateImage (cvGetSize(img), IPL_DEPTH_8U,1);
    CvMat *mat= cvCreateMat(newImg->height, newImg->width, CV_64FC1);
    CvMat *mat1= cvCreateMat(newImg->height, newImg->width, CV_64FC1);
    CvMat *mat2= cvCreateMat(newImg->height, newImg->width, CV_64FC1);

    cvCvtColor(img,newImg,CV_RGB2GRAY);
    cvThreshold(newImg, newImg, 200,255,CV_THRESH_BINARY_INV);
    cvConvert(newImg, mat);

    cvCanny(newImg,newImg1,1,1,3);
    cvConvert(newImg1, mat1);

    cvMorphologyEx( newImg, newImg2, 0, 0, CV_MOP_OPEN, 3);
    cvConvert(newImg2, mat2);

    float putih1 = 0;

    for(int x=0; x<newImg->height; x++){
        for(int y=0; y<newImg->width; y++)
        {
            if (cvmGet (mat,x,y)==255){
                putih1++;
            }
        }
    }

    printf("Luas Daerah Citra / Area Yang Rusak: %.0f\n",putih1);

    cvShowImage( "original", img );
    cvShowImage( "src", newImg );
    cvShowImage( "canny", newImg1 );
    //cvShowImage( "opening", newImg2 );

    cvWaitKey(0);
    return 0;
}