Detect blinks and smiles in Image

UIImage *image = [UIImage imageNamed:@"myImage"];
CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeFace
                                          context:nil
                                          options:@{CIDetectorAccuracy: CIDetectorAccuracyHigh}];

NSDictionary *options = @{ CIDetectorSmile: @YES, CIDetectorEyeBlink: @YES };

NSArray *features = [detector featuresInImage:image.CIImage options:options];

for (CIFaceFeature *feature in features) {
    NSLog(@"Bounds: %@", NSStringFromCGRect(feature.bounds));

    if (feature.hasSmile) {
    NSLog(@"Nice smile!");
    } else {
    NSLog(@"Why so serious?");
    }
    if (feature.leftEyeClosed || feature.rightEyeClosed) {
    NSLog(@"Open your eyes!");
    }
}