Publications

@article{Monakhova:20b,

title = {Spectral DiffuserCam: lensless snapshot hyperspectral imaging with a spectral filter array},

author = {Kristina Monakhova and Kyrollos Yanny and Neerja Aggarwal and Laura Waller},

url = {http://www.osapublishing.org/optica/abstract.cfm?URI=optica-7-10-1298},

doi = {10.1364/OPTICA.397214},

year  = {2020},

date = {2020-10-01},

journal = {Optica},

volume = {7},

number = {10},

pages = {1298--1307},

publisher = {OSA},

abstract = {Hyperspectral imaging is useful for applications ranging from medical diagnostics to agricultural crop monitoring; however, traditional scanning hyperspectral imagers are prohibitively slow and expensive for widespread adoption. Snapshot techniques exist but are often confined to bulky benchtop setups or have low spatio-spectral resolution. In this paper, we propose a novel, compact, and inexpensive computational camera for snapshot hyperspectral imaging. Our system consists of a tiled spectral filter array placed directly on the image sensor and a diffuser placed close to the sensor. Each point in the world maps to a unique pseudorandom pattern on the spectral filter array, which encodes multiplexed spatio-spectral information. By solving a sparsity-constrained inverse problem, we recover the hyperspectral volume with sub-super-pixel resolution. Our hyperspectral imaging framework is flexible and can be designed with contiguous or non-contiguous spectral filters that can be chosen for a given application. We provide theory for system design, demonstrate a prototype device, and present experimental results with high spatio-spectral resolution.},

keywords = {algorithm, compressed sensing, diffuser, Hyperspectral imaging; Imaging systems; Optical components; Optical design; Spectral imaging; Systems design, Image reconstruction, Image sensors, Inverse problems, Sensors},

pubstate = {published},

tppubtype = {article}

}

@article{antipa2018diffusercam,

title = {DiffuserCam: Lensless single-exposure 3D imaging},

author = { Nick Antipa and Grace Kuo and Reinhard Heckel and Ben Mildenhall and Emrah Bostan and Ren Ng and Laura Waller},

url = {https://doi.org/10.1364/OPTICA.5.000001},

doi = {10.1364/OPTICA.5.000001},

year  = {2018},

date = {2018-01-20},

journal = {Optica},

volume = {5},

number = {1},

pages = {1--9},

publisher = {Optical Society of America},

keywords = {compressed sensing, diffuser, lensless imaging},

pubstate = {published},

tppubtype = {article}

}