Data augmentation in deep learning refers to the process of artificially increasing the size of a training dataset by applying various transformations to the original data. This is commonly used in computer vision to create more diverse examples without the need for additional data collection. For instance, when training an image classification model, you might rotate, flip, or crop the images, change their brightness, or add noise. These transformations help the model generalize better, reducing overfitting and improving performance on unseen data. For example, in a model designed to recognize cats and dogs, applying augmentation techniques could involve rotating the images of the animals, altering their color balance, or zooming in on certain areas, which ensures the model doesn't simply memorize specific characteristics of the original images. Data augmentation is particularly useful when working with limited datasets, as it increases the diversity of the training examples, allowing the model to learn more robust features. Ultimately, the goal of data augmentation is to improve the generalization ability of deep learning models and enhance their ability to make accurate predictions on new, unseen data.
What is data augmentation in deep learning?

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