聚焦测距的纹理二阶理论
A second-order theory of texture for depth from focus
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中文总结 AI 辅助
该研究提出基于波动光学的纹理二阶理论，发现传统视为无纹理的表面因主观散斑也会产生纹理，通过窄带光谱滤波器提升二阶纹理对比度，大幅改善看似无纹理场景的被动深度重建效果。
中文摘要 AI 辅助
我们提出一种基于波动光学的光学粗糙表面纹理外观理论，强调纹理在被动聚焦测距中的作用。该理论表明，即使传统计算机视觉视为无纹理的表面，也会因表面微几何产生的主观散斑而呈现纹理外观。我们分析了这种二阶纹理的特性，证明通过使用窄带光谱滤波器，可在自然环境光下显著提升其对比度。我们通过大量理论分析、模拟及真实实验表明，此举能大幅改善看似无纹理场景的被动深度重建效果。
英文摘要
We present a theory of textured appearance of optically rough surfaces based on wave optics, emphasizing the role of texture for passive depth from focus. Our theory shows that even surfaces that traditional computer vision would consider textureless can produce textured appearance, due to subjective speckle from surface microgeometry. We analyze the properties of this second-order texture, and show that we can enhance its contrast under natural ambient lighting by simply using a narrowband spectral filter. Doing so results in dramatic improvements in passive depth reconstruction of seemingly textureless scenes, as we demonstrate through extensive theory, simulations, and real-world experiments.
