Deep Residual Learning for Image Recognition: The ResNet Framework

ArticleKaiming He, Xiangyu Zhang, Shaoqing Ren, Jian SunResearch

Kaiming He and colleagues introduce a residual learning framework designed to simplify the training of substantially deeper neural networks by reformulating layers to learn residual functions referencing layer inputs.

Key points

  1. Layers are reformulated to learn residual functions with reference to layer inputs rather than unreferenced mappings, facilitating optimization.
  2. Networks evaluated on ImageNet reached up to 152 layers—eight times deeper than VGG nets while maintaining lower complexity.
  3. An ensemble of residual nets achieved a 3.57% error rate on the ImageNet test set, winning first place in the ILSVRC 2015 classification challenge.
  4. The authors also evaluated networks with 100 and 1,000 layers on the CIFAR-10 dataset.
  5. Representations achieved a 28% relative improvement on the COCO object detection benchmark, securing wins across ImageNet and COCO detection, localization, and segmentation tasks.

Why it matters

The paper tackles the degradation and optimization difficulties inherent in training very deep networks. Residual connections allow networks to scale up significantly in depth, forming a cornerstone for modern computer vision architectures.

Analysis

By reformulating the objective of individual network layers to learn residual functions relative to their inputs, the authors bypassed the barrier that previously hindered the optimization of extremely deep models. ResNet demonstrated that depth directly improves representation quality across various vision tasks, achieving state-of-the-art results across major benchmarks without incurring proportional computational costs.

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Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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