牙齿美白iOS

Question

我想从图像中检测牙齿，并希望用滑块将它们变白。

我找到了以下口腔检测代码。但是我应该如何检测确切的牙齿位置，以便我可以美白它们。这个有第三方吗？

// draw a CI image with the previously loaded face detection picture
    CIImage* image = [CIImage imageWithCGImage:imageView.image.CGImage];

    // create a face detector - since speed is not an issue now 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];

    CGAffineTransform transform = CGAffineTransformMakeScale(1, -1);
    transform = CGAffineTransformTranslate(transform, 0, -imageView.bounds.size.height);


    for(CIFaceFeature* faceFeature in features)
    {
        // Get the face rect: Translate CoreImage coordinates to UIKit coordinates
        const CGRect faceRect = CGRectApplyAffineTransform(faceFeature.bounds, transform);

        // create a UIView using the bounds of the face
        UIView* faceView = [[UIView alloc] initWithFrame:faceRect];
        faceView.layer.borderWidth = 1;
        faceView.layer.borderColor = [[UIColor redColor] CGColor];

        // get the width of the face
        CGFloat faceWidth = faceFeature.bounds.size.width;

        // add the new view to create a box around the face
        [imageView addSubview:faceView];

        if(faceFeature.hasMouthPosition)
        {
            // Get the mouth position translated to imageView UIKit coordinates
            const CGPoint mouthPos = CGPointApplyAffineTransform(faceFeature.mouthPosition, transform);

            // Create an UIView to represent the mouth, its size depend on the width of the face.

            UIView* mouth = [[UIView alloc] initWithFrame:CGRectMake(mouthPos.x - faceWidth*MOUTH_SIZE_RATE*0.5,
                                                                     mouthPos.y - faceWidth*MOUTH_SIZE_RATE*0.5,
                                                                     faceWidth*MOUTH_SIZE_RATE,
                                                                     faceWidth*MOUTH_SIZE_RATE)];

            // make the mouth look nice and add it to the view
            mouth.backgroundColor = [[UIColor greenColor] colorWithAlphaComponent:0.3];
            //mouth.layer.cornerRadius = faceWidth*MOUTH_SIZE_RATE*0.5;
            [imageView addSubview:mouth];

             NSLog(@"Mouth %g %g", faceFeature.mouthPosition.x, faceFeature.mouthPosition.y);
        }
    }