UIImage* image = [UIImage imageNamed:@"face.jpg"];

UIImageView *testImage = [[UIImageView alloc] initWithImage: image];

[testImage setTransform:CGAffineTransformMakeScale(1, -1)];

[[[UIApplication sharedApplication] delegate].window setTransform:

     CGAffineTransformMakeScale(1, -1)];

 [testImage setFrame:CGRectMake(, , testImage.image.size.width,

                                   testImage.image.size.height)];

[self.view addSubview:testImage];

CIImage* ciimage = [CIImage imageWithCGImage:image.CGImage];

NSDictionary* opts = [NSDictionary dictionaryWithObject:

                          CIDetectorAccuracyHigh forKey:CIDetectorAccuracy];

CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace

                                              context:nil options:opts];

NSArray* features = [detector featuresInImage:ciimage];

for (CIFaceFeature *faceFeature in features){

}

CGFloat faceWidth = faceFeature.bounds.size.width;

UIView* faceView = [[UIView alloc] initWithFrame:faceFeature.bounds];

faceView.layer.borderWidth = 1;

faceView.layer.borderColor = [[UIColor redColor] CGColor];

[self.view addSubview:faceView];

if(faceFeature.hasLeftEyePosition) {

      UIView* leftEyeView = [[UIView alloc] initWithFrame:

                                   CGRectMake(faceFeature.leftEyePosition.x-faceWidth*0.15,
                                              faceFeature.leftEyePosition.y-faceWidth*0.15, faceWidth*0.3, faceWidth*0.3)];

     [leftEyeView setBackgroundColor:[[UIColor blueColor] colorWithAlphaComponent:0.3]];

     [leftEyeView setCenter:faceFeature.leftEyePosition];

     leftEyeView.layer.cornerRadius = faceWidth*0.15;

     [self.view  addSubview:leftEyeView];

}

if(faceFeature.hasRightEyePosition) {

       UIView* leftEye = [[UIView alloc] initWithFrame:

                               CGRectMake(faceFeature.rightEyePosition.x-faceWidth*0.15,

                                          faceFeature.rightEyePosition.y-faceWidth*0.15, faceWidth*0.3, faceWidth*0.3)];

       [leftEye setBackgroundColor:[[UIColor blueColor] colorWithAlphaComponent:0.3]];

       [leftEye setCenter:faceFeature.rightEyePosition];

       leftEye.layer.cornerRadius = faceWidth*0.15;

       [self.view  addSubview:leftEye];

}

if(faceFeature.hasMouthPosition) {

    UIView* mouth = [[UIView alloc] initWithFrame:

                             CGRectMake(faceFeature.mouthPosition.x-faceWidth*0.2,
                                        faceFeature.mouthPosition.y-faceWidth*0.2, faceWidth*0.4, faceWidth*0.4)];

     [mouth setBackgroundColor:[[UIColor greenColor] colorWithAlphaComponent:0.3]];

      [mouth setCenter:faceFeature.mouthPosition];

      mouth.layer.cornerRadius = faceWidth*0.2;

      [self.view  addSubview:mouth]; 

}