Target noise: A pre-training based neural network initialization for efficient high resolution learning
This work addresses the optimization efficiency challenge for researchers and practitioners in deep learning, offering an incremental improvement over existing initialization methods like Xavier and Kaiming.
The paper tackles the problem of inefficient neural network initialization by proposing a self-supervised pre-training method using random noise as a target, which improves convergence speed without extra data or architectural changes, particularly benefiting implicit neural representations and Deep Image Prior networks by enabling earlier capture of high-frequency components.
Weight initialization plays a crucial role in the optimization behavior and convergence efficiency of neural networks. Most existing initialization methods, such as Xavier and Kaiming initializations, rely on random sampling and do not exploit information from the optimization process itself. We propose a simple, yet effective, initialization strategy based on self-supervised pre-training using random noise as the target. Instead of directly training the network from random weights, we first pre-train it to fit random noise, which leads to a structured and non-random parameter configuration. We show that this noise-driven pre-training significantly improves convergence speed in subsequent tasks, without requiring additional data or changes to the network architecture. The proposed method is particularly effective for implicit neural representations (INRs) and Deep Image Prior (DIP)-style networks, which are known to exhibit a strong low-frequency bias during optimization. After noise-based pre-training, the network is able to capture high-frequency components much earlier in training, leading to faster and more stable convergence. Although random noise contains no semantic information, it serves as an effective self-supervised signal (considering its white spectrum nature) for shaping the initialization of neural networks. Overall, this work demonstrates that noise-based pre-training offers a lightweight and general alternative to traditional random initialization, enabling more efficient optimization of deep neural networks.