A Survey of Convolutional Neural Networks: Analysis, Applications, and Prospects
Zewen LiFan LiuWenjie YangShou-Heng PengJun Zhou
Synthesizes structural advancements across one-dimensional, two-dimensional, and multi-dimensional convolutional neural networks, offering experimentally grounded rules of thumb for model design and highlighting critical directions for future research.
Convolutional neural networks have driven major advances in deep learning for computer vision, speech, and related tasks, yet prior surveys have focused narrowly on applications or older architectures and have overlooked many recent innovations in one-dimensional and multi-dimensional convolutions. This survey addresses the need for a unified, up-to-date treatment by tracing the evolution of CNNs from early perceptrons through modern lightweight and generative models, while also examining practical design choices and emerging challenges.
The authors set out to deliver a general overview of CNN building blocks, representative models, activation and loss functions, optimizers, applications across dimensions, and forward-looking research directions. They achieve this through a structured literature synthesis of models from LeNet-5 to GhostNet, targeted experiments on benchmark datasets, and analysis of open problems.
Experiments compared seven activation functions on LeNet-5 and pre-trained VGG-16 across MNIST, Fashion-MNIST, CIFAR-10, and CIFAR-100; ten optimizers on CIFAR-10; and reviewed loss functions for regression and classification. Key results show that ReLU and Leaky ReLU deliver the best balance of accuracy, stability, and training speed for hidden layers, while sigmoid and tanh frequently slow convergence or fail to train deeper models. Cross-entropy remains the default for classification, yet center loss and triplet loss improve intra-class compactness when needed. Deeper and wider networks consistently raise accuracy, residual connections prevent degradation beyond roughly 50 layers, and depth-wise separable convolutions cut parameters dramatically for mobile use. One-dimensional CNNs excel at fixed-length signal tasks such as ECG analysis and traffic prediction, two-dimensional networks dominate image classification and detection, and three-dimensional networks capture spatio-temporal patterns in video and volumetric data.
These findings indicate that practitioners can safely adopt ReLU-family activations and mini-batch gradient methods with modest learning-rate tuning, while model compression and neural architecture search offer practical routes to deployment on resource-limited hardware. At the same time, the survey underscores vulnerabilities to adversarial and backdoor attacks, the loss of spatial relationships inherent in pooling, and the continuing difficulty of selecting architectures without exhaustive search.
The authors therefore recommend systematic use of the reported rules of thumb for function selection, wider adoption of model-compression techniques, and exploration of capsule networks and agentless architecture search to address current limitations. Experiments were conducted on only four image-classification datasets and two base architectures, so results may not generalize to every domain or scale; the field continues to evolve rapidly, and some cited models will soon be superseded. Overall, the synthesis and experimental comparisons provide a reliable foundation for design decisions while clearly delineating the next technical hurdles.
- Paper: ImageNet Classification with Deep Convolutional Neural Networks, Alex Krizhevsky et al. (2012). This seminal 2012 AlexNet paper established the modern deep convolutional neural network paradigm that the survey paper comprehensively reviews and analyzes.
- Paper: Deep Residual Learning for Image Recognition, Kaiming He et al. (2016). Understanding residual learning and ResNets is essential before reading the survey, as they represent the dominant deep architecture evaluated in the paper.
- Paper: Gradient-based learning applied to document recognition, Yann LeCun et al. (1998). Reading LeCun's classic foundational work provides the historical and architectural baseline for convolutional neural networks examined in the survey.
- Paper: Recent advances in convolutional neural networks, Jiuxiang Gu et al. (2015). This earlier survey on CNN advances provides crucial context and foundational taxonomy that the 2020 survey subsequently updates and broadens.
- Paper: Deep learning in neural networks: An overview, Juergen Schmidhuber (2014). This historical overview of deep learning offers vital background on the credit assignment problem and early network architectures referenced in the survey's historical introduction.
- Paper: A Survey on Vision Transformer, Kai Han et al. (2020). This survey naturally extends the source by tracking the subsequent paradigm shift from convolutional neural networks to transformer-based vision architectures.
- Paper: On the Relationship between Self-Attention and Convolutional Layers, Jean-Baptiste Cordonnier et al. (2020). This study builds directly upon standard CNN foundations by theoretically and empirically comparing convolutional layers with emerging self-attention mechanisms.
