Initializing Models with Larger Ones

Published: 16 Jan 2024, Last Modified: 21 Apr 2024ICLR 2024 spotlightEveryoneRevisionsBibTeX
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Keywords: Deep Learning, Neural Networks, Weight Initialization, Small Models, Computer Vision
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TL;DR: Selecting weights from a pretrained large model to initialize a small model improves accuracy and reduces training time
Abstract: Weight initialization plays an important role in neural network training. Widely used initialization methods are proposed and evaluated for networks that are trained from scratch. However, the growing number of pretrained models now offers new opportunities for tackling this classical problem of weight initialization. In this work, we introduce weight selection, a method for initializing smaller models by selecting a subset of weights from a pretrained larger model. This enables the transfer of knowledge from pretrained weights to smaller models. Our experiments demonstrate that weight selection can significantly enhance the performance of small models and reduce their training time. Notably, it can also be used together with knowledge distillation. Weight selection offers a new approach to leverage the power of pretrained models in resource-constrained settings, and we hope it can be a useful tool for training small models in the large-model era.
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Primary Area: unsupervised, self-supervised, semi-supervised, and supervised representation learning
Submission Number: 762
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