AIS412 Lecture 9: Image Classifiers
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Questions and Answers

What is the primary disadvantage of the Nearest Neighbor classifier?

  • Fast training and fast prediction
  • Slow training and slow prediction
  • Fast training but slow prediction
  • Slow training but fast prediction (correct)

In K-Nearest Neighbors, what is the purpose of taking a majority vote from the K closest points?

  • To select a random point
  • To calculate the average distance
  • To find the furthest neighbor
  • To classify the test image (correct)

What are hyperparameters in machine learning?

  • Test data used for validation
  • Choices about the data that are set rather than learned (correct)
  • Results of cross-validation
  • Parameters automatically learned by the model

What is the major drawback of always choosing K = 1 when setting hyperparameters?

<p>Overfitting to the training data (D)</p> Signup and view all the answers

What is the purpose of cross-validation in machine learning?

<p>To evaluate prediction performance (B)</p> Signup and view all the answers

What is the main challenge in developing an image classifier compared to sorting a list of numbers?

<p>Recognizing different classes like cats requires a more complex algorithm (D)</p> Signup and view all the answers

What is the first step in using machine learning to train an image classifier?

<p>Collect a dataset of images and labels (D)</p> Signup and view all the answers

What is the role of the 'Nearest Neighbor' method in image classification?

<p>Memorize all data and labels then predict the label of the most similar training image (C)</p> Signup and view all the answers

In the CIFAR10 dataset, how many testing images are included for evaluation?

<p>10,000 (B)</p> Signup and view all the answers

Why is the training process for image classifiers considered time-consuming?

<p>The dataset used for training is usually very large (D)</p> Signup and view all the answers

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