Eye Detection Using Opencv

Question

I am working on object detection (eyes) using OpenCV. Following is the code as it is not able to identify an eye object (exactly or near by). Can anyone help me solve this problem?

if(imageView.image) {
  cvSetErrMode(CV_ErrModeParent);

  IplImage *image = [self CreateIplImageFromUIImage:imageView.image];

  // Scaling down
  IplImage *small_image = cvCreateImage(cvSize(image->width/2,image->height/2), IPL_DEPTH_8U, 3);
  cvPyrDown(image, small_image, CV_GAUSSIAN_5x5);
  int scale = 2;

  // Load XML
  NSString *path1=[[NSBundle mainBundle] pathForResource:@"haarcascade_eye" ofType:@"xml"];
  NSString *path = [[NSBundle mainBundle] pathForResource:@"haarcascade_frontalface_default" ofType:@"xml"];
  CvHaarClassifierCascade* cascade = (CvHaarClassifierCascade*)cvLoad([path cStringUsingEncoding:NSASCIIStringEncoding], NULL, NULL, NULL);
  CvHaarClassifierCascade* cascade1= (CvHaarClassifierCascade*)cvLoad([path1 cStringUsingEncoding:NSASCIIStringEncoding], NULL, NULL,NULL);
  CvMemStorage* storage = cvCreateMemStorage(0);

  // Detect faces and draw rectangle on them
  CvSeq* faces = cvHaarDetectObjects(small_image, cascade, storage, 1.2f, 2, CV_HAAR_DO_CANNY_PRUNING, cvSize(20, 20));
  cvReleaseImage(&small_image);

  // Create canvas to show the results
  CGImageRef imageRef = imageView.image.CGImage;
  CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
  CGContextRef contextRef = CGBitmapContextCreate(NULL, imageView.image.size.width, imageView.image.size.height,
              8, imageView.image.size.width * 4,
              colorSpace, kCGImageAlphaPremultipliedLast|kCGBitmapByteOrderDefault);
  CGContextDrawImage(contextRef, CGRectMake(0, 0, imageView.image.size.width, imageView.image.size.height), imageRef);

  CGContextSetLineWidth(contextRef, 4);
  CGContextSetRGBStrokeColor(contextRef, 0.0, 0.0, 1.0, 0.5);

  CvRect cvrect;

  // Draw results on the iamge
  for(int i = 0; i < faces->total; i++)
  {
   NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

   // Calc the rect of faces
   cvrect = *(CvRect*)cvGetSeqElem(faces, i);
   CGRect face_rect = CGContextConvertRectToDeviceSpace(contextRef, CGRectMake(cvrect.x * scale, cvrect.y * scale, cvrect.width * scale, cvrect.height * scale));

   if(overlayImage) 
   {
    CGContextDrawImage(contextRef, face_rect, overlayImage.CGImage);
   }
   else
   {
    CGContextStrokeRect(contextRef, face_rect);
   }
   [pool release];
  }

  cvClearMemStorage(storage);

   // cvSetImageROI(image,cvRect((cvrect.x * scale),(cvrect.y * (scale +((cvrect.height * scale)/5.5))), (cvrect.width * scale), (cvrect.height * scale)/3.0));
  cvSetImageROI(image, cvRect(80,100,300,300));
  CvSeq* eyes=cvHaarDetectObjects(image, cascade1, storage, 1.15, 3, 0, cvSize(25, 15));
  for(int i=0;i<eyes->total;i++)
  {
   NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
   CvRect  cvrect= *(CvRect*)cvGetSeqElem(eyes, i);
       // cvRectangle(img,cvPoint(cvrect.x * scale, cvrect.y * scale),cvPoint(cvrect.x * scale + cvrect.width * scale, cvrect.y * scale+cvrect.height * scale);
   CGRect eyes_rect = CGContextConvertRectToDeviceSpace(contextRef, CGRectMake(cvrect.x * scale, cvrect.y * scale, cvrect.width * scale, cvrect.height * scale));    
   if(overlayImage) {
   CGContextDrawImage(contextRef, eyes_rect, overlayImage.CGImage);
   }
   else
   {
   CGContextStrokeRect(contextRef, eyes_rect);
   }
   [pool release];
  }
      cvResetImageROI(image);




  imageView.image = [UIImage imageWithCGImage:CGBitmapContextCreateImage(contextRef)];
  CGContextRelease(contextRef);
  CGColorSpaceRelease(colorSpace);


  cvReleaseMemStorage(&storage);
  cvReleaseHaarClassifierCascade(&cascade);
  //int i;

  [self hideProgressIndicator];
 }

}