Cant display largest blob in new image.

[legolas]

Hi. I am new to the group. I have a binary image and i want to display the largest only in the new image. However i fail. Below is my code:

                        //load image

IplImage * inputImage = cvLoadImage("fill.jpg");

CBlobResult blobs;

blobs = CBlobResult( inputImage, NULL, 0 ); 

// number of blobs

int n = blobs.GetNumBlobs();

cout<<"number of blobs: "<<n<<endl;

CBlob *currentBlob;

CBlob *maxBlob;

double max=0.0,currentBlobArea=0.0;

IplImage * imgBlob=cvCreateImage(cvGetSize(inputImage),IPL_DEPTH_8U,1);

for (int i=0; i<n; i++ )

{

currentBlob = blobs.GetBlob(i);

//if currentBlob area is largest, fill the imgBlob;

currentBlobArea = currentBlob->Area();

//cout<<"area: "<<currentBlobArea<<endl;

if(currentBlobArea>max){

maxBlob = currentBlobArea;

}

}

                        //cout<<"largest area is: "<<max<<endl;

maxBlob->FillBlob(imgBlob, CV_RGB(255,255,255));

cvShowImage("blob",imgBlob);

cvSaveImage("blob.jpg",imgBlob);

cvWaitKey(0);

cvReleaseImage(&imgBlob);

Is the way i create new image wrong?

Please help me. Thank you.