Breaking the Limits of Reliable Prediction via Generated Data

In open-world recognition of safety-critical applications, providing reliable prediction for deep neural networks has become a critical requirement. Many methods have been proposed for reliable prediction related tasks such as confidence calibration, misclassification detection, and out-of-distribution detection. Recently, pre-training has been shown to be one of the most effective methods for improving reliable prediction, particularly for modern networks like ViT, which require a large amount of training data. However, collecting data manually is time-consuming. In this paper, taking advantage of the breakthrough of generative models, we investigate whether and how expanding the training set using generated data can improve reliable prediction. Our experiments reveal that training with a large quantity of generated data can eliminate overfitting in reliable prediction, leading to significantly improved performance. Surprisingly, classical networks like ResNet-18, when trained on a notably extensive volume of generated data, can sometimes exhibit performance competitive to pre-training ViT with a substantial real dataset.