The impact of integrating shallow and deep information on knowledge distillation

Knowledge distillation is a key technique for compressing neural networks, leveraging insights from a large teacher model to enhance the generalization capability of a smaller student model. The ResNet family, recognized for its residual connections, is commonly employed for various visual tasks. It effectively addresses issues such as gradient vanishing and degradation in deep neural networks, making the training process more manageable. As a deep network architecture, ResNet is proficient in feature extraction and is frequently used as a backbone for knowledge refinement. However, our experimental findings reveal that the ResNet model falls short in extracting shallow information from images, which in turn affects the performance of the corresponding student model. To address these issues, we propose a shallow feature extraction module (SFEM) that enriches the receptive field of images through dilated convolutions and captures information at different scales, while reducing parameter counts and optimizing computational resources. Additionally, to enhance the model's sensitivity to both horizontal and vertical directions, we introduce a full-dimensional perceptual (FDP) attention mechanism. Experimental results demonstrate that on the CIFAR-100 dataset, compared to the baseline model, our model improves the performance of the student model under the same architectural guidance by 1.73%, 1.41%, 1.16%, and 0.72%, respectively. Under different architectural guidance, the performance of the student model on the CIFAR-100 dataset improves by 2.27% and 1.51%, respectively.Compared to state-of-the-art knowledge distillation methods (e.g., RKD and VID), the performance of our student model improves by 1.03% and 1.56%, respectively.