On the Compression of Neural Networks Using $\ell_0$-Norm Regularization and Weight Pruning
This addresses the need for efficient neural network deployment in edge and embedded applications, though it is incremental as it builds on existing compression techniques.
The paper tackles the problem of neural network compression for real-world deployment by developing a novel scheme using ℓ0-norm regularization to induce sparsity during training, followed by pruning and fine-tuning, resulting in smaller networks with maintained accuracy.
Despite the growing availability of high-capacity computational platforms, implementation complexity still has been a great concern for the real-world deployment of neural networks. This concern is not exclusively due to the huge costs of state-of-the-art network architectures, but also due to the recent push towards edge intelligence and the use of neural networks in embedded applications. In this context, network compression techniques have been gaining interest due to their ability for reducing deployment costs while keeping inference accuracy at satisfactory levels. The present paper is dedicated to the development of a novel compression scheme for neural networks. To this end, a new form of $\ell_0$-norm-based regularization is firstly developed, which is capable of inducing strong sparseness in the network during training. Then, targeting the smaller weights of the trained network with pruning techniques, smaller yet highly effective networks can be obtained. The proposed compression scheme also involves the use of $\ell_2$-norm regularization to avoid overfitting as well as fine tuning to improve the performance of the pruned network. Experimental results are presented aiming to show the effectiveness of the proposed scheme as well as to make comparisons with competing approaches.