arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2303.11554eess.IV
收藏

使用优化径向掩模的扩展景深无透镜成像

Extended Depth-of-Field Lensless Imaging using an Optimized Radial Mask

Jose Reinaldo Cunha Santos A V Silva Neto, Tomoya Nakamura, Yasushi Makihara, Yasushi Yagi

AI总结:

本文提出一种形状保持的径向掩模优化方案,在保留径向特性以扩展景深的同时改善频率响应,模拟和原型实验验证了其优于朴素径向及非径向掩模的性能。

摘要:

基于掩模的无透镜相机所使用的编码掩模的设计自由度是这些系统相较于基于透镜的系统的一个优势。我们利用这一设计自由度,提出了一种针对径向型振幅编码掩模的形状保持优化方案。由于径向掩模的点扩散函数具有深度无关性,它们可用于扩展无透镜成像系统的有效景深(DOF)。在本文中,我们优化了一种编码掩模以改善频率响应,同时保留其径向特性,从而保持扩展景深的能力。我们表明,与径向掩模的朴素实现相比,我们优化的径向掩模实现了更好的整体频率响应。我们还通过模拟,将其与不同的非径向编码掩模进行比较,定量和定性地证明了我们优化的径向掩模所实现的扩展景深成像。最后,我们构建了一个原型相机,以在真实场景中验证我们编码掩模的扩展景深能力。

英文摘要:

The freedom of design of coded masks used by mask-based lensless cameras is an advantage these systems have when compared to lens-based ones. We leverage this freedom of design to propose a shape-preserving optimization scheme for a radial-type amplitude coded mask. Due to the depth-independency of the radial mask's point spread function, they can be used for extending the effective depth of field (DOF) of a lensless imaging system. In this paper we optimized a coded mask for improved frequency response, while retaining its radial characteristics and therefore extended-DOF capabilities. We show that our optimized radial mask achieved better overall frequency response when compared to naive implementations of a radial mask. We also quantitatively and qualitatively demonstrated the extended DOF imaging achieved by our optimized radial mask in simulations by comparing it to different non-radial coded masks. Finally, we built a prototype camera to validate the extended DOF capabilities of our coded mask in real scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑