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license: apache-2.0
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# Visual Anomaly Detection under Complex View-Illumination Interplay: A Large-Scale Benchmark
🌐 [Hugging Face Dataset](https://huggingface.co/datasets/ChengYuQi99/M2AD)
> 📚 [**Paper**](https://arxiv.org/abs/2505.10996) • 🏠 [**Homepage**](https://hustcyq.github.io/M2AD/)
> by [Yunkang Cao*](https://caoyunkang.github.io/), [Yuqi Cheng*](https://hustcyq.github.io/), [Xiaohao Xu](), [Yiheng Zhang](), [Yihan Sun](), [Yuxiang Tan](), [Yuxin Zhang](), [Weiming Shen](https://scholar.google.com/citations?user=FuSHsx4AAAAJ&hl=en),
## 🚀 Updates
We're committed to open science! Here's our progress:
* **2025/05/19**: 📄 Paper released on [ArXiv](https://arxiv.org/abs/2505.10996).
* **2025/05/16**: 🌐 Dataset homepage launched.
* **2025/05/24**: 🧪 Code release for benchmark evaluation! [code](https://github.com/hustCYQ/M2AD)
## 📊 Introduction
Visual Anomaly Detection (VAD) systems often fail in the real world due to sensitivity to **viewpoint-illumination interplay**—complex interactions that distort defect visibility. Existing benchmarks overlook this challenge.
Introducing **M2AD** (Multi-View Multi-Illumination Anomaly Detection), a large-scale benchmark designed to rigorously test VAD robustness under these conditions:
- **119,880 high-resolution images** across 10 categories, 999 specimens, 12 views, and 10 illuminations (120 configurations).
- **Two evaluation protocols**:
- 🔄 **M2AD-Synergy**: Tests multi-configuration information fusion.
- 🧪 **M2AD-Invariant**: Measures single-image robustness to view-illumination variations.
- Key finding: SOTA VAD methods struggle significantly on M2AD, highlighting the critical need for robust solutions.
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