ios – 如何在面上的两个点集之间添加度量,以将其用于数字图像中的对象检测以进行面部识别

我可以使用以下方法识别如下图所示的脸部特征：

-(void)markFaces:(UIImageView *)facePicture
 {
     // draw a CI image with the prevIoUsly loaded face detection picture
     CIImage* image = [CIImage imageWithCGImage:facePicture.image.CGImage];

     // create a face detector - since speed is not an issue we'll use a high accuracy
     // detector
     CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace
                                          context:nil options:     [NSDictionary DictionaryWithObject:CIDetectOraccuracyHigh forKey:CIDetectOraccuracy]];

     // create an array containing all the detected faces from the detector
     NSArray* features = [detector featuresInImage:image];

     // we'll iterate through every detected face.  CIFaceFeature provides us
     // with the width for the entire face,and the coordinates of each eye
     // and the mouth if Detected.  Also provided are BOOL's for the eye's and
     // mouth so we can @R_607_10943@k if they already exist.
     for(CIFaceFeature* faceFeature in features)
     {
         // get the width of the face
         CGFloat faceWidth = faceFeature.bounds.size.width;

         // create a UIView using the bounds of the face
         UIView* faceView = [[UIView alloc] initWithFrame:faceFeature.bounds];

         // add a border around the newly created UIView
         faceView.layer.borderWidth = 1;
         faceView.layer.borderColor = [[UIColor redColor] CGColor];

         // add the new view to create a Box around the face
    [self.view addSubview:faceView];

         if(faceFeature.hasLeftEyePosition)
         {
             // create a UIView with a size based on the width of the face
             UIView* leftEyeView = [[UIView alloc] initWithFrame:CGRectMake(faceFeature.leftEyePosition.x-faceWidth*0.15,faceFeature.leftEyePosition.y-faceWidth*0.15,faceWidth*0.3,faceWidth*0.3)];
             // change the BACkground color of the eye view
             [leftEyeView setBACkgroundColor:[[UIColor blueColor] colorWithAlphaComponent:0.3]];
             // set the position of the leftEyeView based on the face
             [leftEyeView setCenter:faceFeature.leftEyePosition];

           // round the corners
             leftEyeView.layer.cornerRadius = faceWidth*0.15;
             // add the view to the window
             [self.view addSubview:leftEyeView];
         }

         if(faceFeature.hasRightEyePosition)
         {
             // create a UIView with a size based on the width of the face
             UIView* leftEye = [[UIView alloc] initWithFrame:CGRectMake(faceFeature.rightEyePosition.x-faceWidth*0.15,faceFeature.rightEyePosition.y-faceWidth*0.15,faceWidth*0.3)];
             // change the BACkground color of the eye view
             [leftEye setBACkgroundColor:[[UIColor blueColor] colorWithAlphaComponent:0.3]];
             // set the position of the rightEyeView based on the face
             [leftEye setCenter:faceFeature.rightEyePosition];
             // round the corners
             leftEye.layer.cornerRadius = faceWidth*0.15;
             // add the new view to the window
             [self.view addSubview:leftEye];
         }     

         if(faceFeature.hasMouthPosition)
         {
             // create a UIView with a size based on the width of the face
             UIView* mouth = [[UIView alloc] initWithFrame:CGRectMake(faceFeature.mouthPosition.x-faceWidth*0.2,faceFeature.mouthPosition.y-faceWidth*0.2,faceWidth*0.4,faceWidth*0.4)];
             // change the BACkground color for the mouth to green
             [mouth setBACkgroundColor:[[UIColor greenColor] colorWithAlphaComponent:0.3]];

             // set the position of the mouthView based on the face
             [mouth setCenter:faceFeature.mouthPosition];

              // round the corners
             mouth.layer.cornerRadius = faceWidth*0.2;

             // add the new view to the window
             [self.view addSubview:mouth];
              }
          }
      }

      -(void)faceDetector
      {
          // Load the picture for face detection
          //UIImageView* image = [[UIImageView alloc] initWithImage:[UIImage imagenamed:@"facedetectionpic.jpg"]];
          UIImageView* image = [[UIImageView alloc] initWithImage:[UIImage imagenamed:@"timthumb.png"]];
          // Draw the face detection image
          [self.view addSubview:image];

          // Execute the method used to markFaces in BACkground
          [self performSELEctorInBACkground:@SELEctor(markFaces:) withObject:image];

          // flip image on y-axis to match coordinate system used by core image
          [image setTransform:CGAffineTransformMakeScale(1,-1)];

          // flip the entire window to make everything right side up
          [self.view setTransform:CGAffineTransformMakeScale(1,-1)];


      }

现在我想在上传到数据库之前添加点来定位眼睛,鼻子等的参考.稍后,可以将这些图像与基于这些度量点位置的现有图像进行比较,如下所示

我已经提到This Link但是无法实现这个..如果有人知道这个请建议我

谢谢