Single-shot lensless imaging with fresnel zone aperture and incoherent illumination
Name
s41377-020-0289-9.pdf
Description
Published version
Size
4.6 MB
Format
Adobe PDF
Checksum (MD5)
d27a7f91507ebc8073bfa8ed56d8ec6b
Author(s)
Wu, Jiachen
Zhang, Hua
Zhang, Wenhui
Jin, Guofan
Cao, Liangcai
Barbastathis, George
Date Issued
April 2020
Journal
Light: Science and Applications
Publisher
Springer Science and Business Media LLC
Citation
Wu, Jiachen et al., "Single-shot lensless imaging with fresnel zone aperture and incoherent illumination." Light: Science and Applications 9 (April 2020): no. 53 doi. 10.1038/s41377-020-0289-9 ©2020 Author(s)
Version
Final published version
Abstract
Lensless imaging eliminates the need for geometric isomorphism between a scene and an image while allowing the construction of compact, lightweight imaging systems. However, a challenging inverse problem remains due to the low reconstructed signal-to-noise ratio. Current implementations require multiple masks or multiple shots to denoise the reconstruction. We propose single-shot lensless imaging with a Fresnel zone aperture and incoherent illumination. By using the Fresnel zone aperture to encode the incoherent rays in wavefront-like form, the captured pattern has the same form as the inline hologram. Since conventional backpropagation reconstruction is troubled by the twin-image problem, we show that the compressive sensing algorithm is effective in removing this twin-image artifact due to the sparsity in natural scenes. The reconstruction with a significantly improved signal-to-noise ratio from a single-shot image promotes a camera architecture that is flat and reliable in its structure and free of the need for strict calibration. ©2020, The Author(s).
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/s41377-020-0289-9
