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  • Use model deployment and security with Core ML

    Discover how to deploy Core ML models outside of your app binary, giving you greater flexibility and control when bringing machine learning features to your app. And learn how Core ML Model Deployment enables you to deliver revised models to your app without requiring an app update. We'll also walk you through how you can protect custom machine learning models through encryption, and preview your model performance in Xcode.

    For more information on working with Core ML, including bringing over models trained in environments like TensorFlow and PyTorch, we also recommend watching "Get your models on device using Core ML Converters.”

    Recursos

    • Core ML
      • Vídeo HD
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    Vídeos relacionados

    WWDC20

    • Build trust through better privacy
    • Get models on device using Core ML Converters
  • Buscar neste vídeo...
    • 4:34 - Flower Classifier using Core ML Model Deployment

      private func classifyFlower(in image: CGImage) {
              // Check for a loaded model
              if let model = flowerClassifier {
                  classify(image, using: model)
                  return
              }
            
              MLModelCollection.beginAccessing(identifier: "FlowerModels") { [self] result in
                  var modelURL: URL?
                  switch result {
                  case .success(let collection):
                      modelURL = collection.entries["FlowerClassifier"]?.modelURL
                  case .failure(let error):
                      handleModelCollectionFailure(for: error)
                  }
                                                                     
                  let result = loadFlowerClassifier(from: modelURL)
                                                                     
                  switch result {
                  case .success(let model):
                      classify(image, using: model)
                  case .failure(let error):
                      handleModelLoadFailure(for: error)
                  }
              }
          }
      
          func loadFlowerClassifier(from modelURL: URL?) -> Result<FlowerClassifier, Error> {
              if let modelURL = modelURL {
                  return Result { try FlowerClassifier(contentsOf: modelURL) }
              } else {
                  return Result { try FlowerClassifier(configuration: .init()) }
              }
          }
    • 20:03 - Compiler flag for encrypting a model

      --encrypt "$SRCROOT/HelloFlowers/Models/FlowerStylizer.mlmodelkey"
      
      [Production note] or if we're tight for horizontal space we can use this:
      
      --encrypt "$SRCROOT/.../FlowerStylizer.mlmodelkey"
    • 20:50 - Working with an encrypted model

      func stylizeImage() {
          // If we already loaded the model, apply the effect
          if let model = flowerStylizer {
              applyStyledEffect(using: model)
              return
          }
              
          // Otherwise load and apply
          FlowerStylizer.load { [self] result in
                  
              switch result {
      
              case .success(let model):
                  flowerStylizer = model
                  DispatchQueue.main.async {
                      applyStyledEffect(using: model)
                  }
                      
              case .failure(let error):
                  handleFailure(for: error)
                      
              }
          }
      }
      
      func handleFailure(for error: Error) {
          switch error {
          case MLModelError.modelKeyFetch:
              handleNetworkFailure()
                  
          default:
              handleModelLoadError(error)
          }
      }

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