用特殊表面让图像变伪装，光学隐藏信息骗过人眼。
Lying mirror using structured surfaces
- 用优化的衍射结构表面实现光的被动变换，不需计算。
- 可隐藏多种图像，在噪声、旋转、缩放下仍有效。
- 适合安防、军事、娱乐中的光学隐写场景。
我们提出一种全光学系统——“谎言镜”，通过将输入信息转换为误导性、看似普通的图案，实现对原始图像数据的视觉伪装，从而欺骗观察者。该伪装效果通过入射光与优化设计的结构化衍射表面之间的被动光-物质相互作用实现，可在无需任何数字计算的情况下完成任意形式秘密数据的光学隐藏。实验验证表明，该方法能有效伪装多种图像数据，并对随机噪声以及未知的旋转、平移和缩放等对抗性扰动具有鲁棒性。基于多波长照明（480、550 和 600 nm，覆盖蓝、绿、红通道）的微镜阵列实现了概念验证。此外，我们还构建了可在连续光谱范围内工作的宽带谎言镜，提升其在不同光照条件下的适应能力。该框架展示了结构化衍射表面在视觉信息处理中的潜力，或可用于国防、安全与娱乐等领域。
原文摘要 · Abstract (English)
We introduce an all-optical system, termed the "lying mirror", to hide input information by transforming it into misleading, ordinary-looking patterns that effectively camouflage the underlying image data and deceive the observers. This misleading transformation is achieved through passive light-matter interactions of the incident light with an optimized structured diffractive surface, enabling the optical concealment of any form of secret input data without any digital computing. These lying mirror designs were shown to camouflage different types of input image data, exhibiting robustness against a range of adversarial manipulations, including random image noise as well as unknown, random rotations, shifts, and scaling of the object features. The feasibility of the lying mirror concept was also validated experimentally using a structured micro-mirror array along with multi-wavelength illumination at 480, 550 and 600 nm, covering the blue, green and red image channels. Furthermore, we created a broadband lying mirror that operates across a continuous spectral range, enhancing its adaptability under diverse illumination conditions. This framework showcases the power of structured diffractive surfaces for visual information processing and might find various applications in defense, security and entertainment.
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