衍射光学的衍射消色差全谱计算成像

IF 0.7 4区 计算机科学 Q4 COMPUTER SCIENCE, CYBERNETICS
Yifan Peng, Q. Fu, Felix Heide, W. Heidrich
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引用次数: 51

摘要

衍射光学元件(DOEs)在计算成像中很有前途,因为与折射率元件相比,它们可以大大减少成像器件的尺寸和重量。然而,固有的强色散限制了它们在全光谱成像中的使用,导致不可接受的色彩保真度损失。特别是,同分距引入了一个数据依赖的图像模糊,这在计算成像方法一直被忽视。我们介绍了一种基于计算优化的衍射消色差,以及相应的残差校正的跨尺度算法。对衍射透镜的高度分布进行了优化,以平衡不同波长的聚焦贡献。几乎相同的谱点扩展函数(psf)产生近似谱不变的模糊核。这种特性保证了良好的颜色保存,并有助于在我们的快速两步反卷积中校正残余像差,而无需额外的颜色先验。我们展示了在0.5mm超薄衬底上的衍射消色差,在全可见光谱下产生高色彩保真度和更好的图像质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The diffractive achromat full spectrum computational imaging with diffractive optics
Diffractive optical elements (DOEs) are promising in computational imaging because they can drastically reduce the size and weight of imaging devices compared to their refractive counterparts. However, the inherent strong dispersion limits their use in full spectrum imaging, causing unacceptable loss of color fidelity. In particular, metamerism introduces a data dependency in the image blur, which has been neglected in computational imaging methods. We introduce both a diffractive achromat based on computational optimization, as well as a corresponding cross-scale algorithm for correction of residual aberrations. The height profile of a diffractive lens is optimized to balance the focusing contributions of different wavelengths. The nearly identical spectral point spread functions (PSFs) create approximately spectrally invariant blur kernels. This property guarantees good color preservation and facilitates correction of residual aberrations in our fast two-step deconvolution without additional color priors. We demonstrate a diffractive achromat on a 0.5mm ultrathin substrate, with producing high color fidelity and better image quality in full visible spectrum.
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来源期刊
CiteScore
2.20
自引率
0.00%
发文量
8
审稿时长
>12 weeks
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