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What is Image Augmentation?

Image augmentation is a transformative technique used in computer vision to enhance the diversity of training datasets. It is particularly beneficial in machine learning applications, where obtaining a large, labeled dataset can be challenging.

Purpose of Image Augmentation

In machine learning, models require extensive exposure to varying conditions to generalize effectively. Image augmentation artificially increases the size of the dataset by applying various transformations to the original images.

Common Techniques

  • Rotation: Rotating images by random angles to teach the model about different perspectives.
  • Flipping: Horizontally or vertically flipping images enhances symmetry learning.
  • Scaling: Resizing images to create a variety of dimensions.
  • Color Jitter: Varying brightness, contrast, saturation, and hue to simulate different lighting conditions.
  • Cropping: Randomly cropping sections of images keeps the model focused on different parts.

Benefits

Image augmentation helps mitigate overfitting by providing a more varied training set. This leads to improved model robustness and performance, particularly in instances where labeled data is scarce. By simulating a wider range of scenarios, models can better learn to recognize patterns and features in images.

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