hsiaoer

class ViewController: UIViewController {
  let background = UIImage(named: "clouds.png")
  var animationDuration = 12.0

  override func viewDidLoad() {
    ///...
    backgroundView = initialBackground()
    backgroundViewDelayed = initialBackground()

    view.addSubview(backgroundView)

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/// Remove background of input image based on an alpha mask.
///
/// - Parameters:
///   - image: Image to mask
///   - mask: Input mask.  Reduces pixel opacity by mask alpha value. For instance
///       an alpha value of 255 will be completely opaque, 0 will be completely transparent
///       and a value of 125 will be partially transparent.
/// - Returns: Image mask with background removed.
func createMask(of image: UIImage, fromMask mask: UIImage, withBackground background: UIImage? = nil) -> UIImage? {
  guard let imageCG = image.cgImage, let maskCG = mask.cgImage else { return nil }

hsiaoer

private lazy var visionModel = FritzVisionSkySegmentationModel()

/// ...

func createSticker(_ image: UIImage) {
  /// Use the result to build a mask
  guard let result = try? visionModel.predict(fritzImage),
    let mask = result.buildSingleClassMask(
      forClass: FritzVisionSkyClass.none,
      clippingScoresAbove: clippingScoresAbove,

hsiaoer

class ViewController: UIViewController {

  @IBOutlet var imageView: UIImageView!
  var backgroundView: UIImageView!
  var backgroundViewDelayed: UIImageView!

  let context = CIContext()

  // ------------------
  // Step 1

hsiaoer

class ViewController: UIViewController {

  @IBOutlet var imageView: UIImageView!
  var backgroundView: UIImageView!
  var backgroundViewDelayed: UIImageView!

  let context = CIContext()

  // ------------------
  // Step 1

hsiaoer

Lucky Dollar Store Coding Challenge

The “Lucky Dollar Store” wants to test out a new loyalty program so that with each new purchase, a customer is automatically entered in a weekly raffle (one ticket per purchase). At the end of the week, several users can be chosen from a drawing to win giveaway prizes (depending how generous the manager feels).

They’ve hired you to implement this raffle and generously gave you these two functions they will be calling:

def record_customer_purchase(customer):
 # Fill this in

hsiaoer

// Start the animation
mImageView.post(new Runnable() {
    @Override
    public void run() {
        mScaleFactor = (float) mImageView.getHeight() / (float) mImageView.getDrawable().getIntrinsicHeight();
        mMatrix.postScale(mScaleFactor, mScaleFactor);
        mImageView.setImageMatrix(mMatrix);
        animate();
    }
});

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// Scale the bitmap to fit the view port
float scaleWidth = ((float) cameraSize.getWidth()) / notSkyBitmap.getWidth();
float scaleHeight = ((float) cameraSize.getWidth()) / notSkyBitmap.getHeight();
final Matrix matrix = new Matrix();
float scale = Math.min(scaleWidth, scaleHeight);
matrix.postScale(scale, scale);

// Create a scaled bitmap
Bitmap scaledNonSkyBitmap = Bitmap.createBitmap(notSkyBitmap, 0, 0,
    notSkyBitmap.getWidth(), notSkyBitmap.getHeight(), matrix, false);

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FritzVisionSegmentResult segmentResult = skyPredictor.predict(visionImage);

hsiaoer

SkySegmentationOnDeviceModel onDeviceModel = new SkySegmentationOnDeviceModel();
predictor = FritzVision.ImageSegmentation.getPredictorTFL(onDeviceModel, options);