TY - GEN
T1 - Sub-Diffraction Imaging Using Fourier Ptychography and Structured Sparsity
AU - Jagatap, Gauri
AU - Chen, Zhengyu
AU - Hegde, Chinmay
AU - Vaswani, Namrata
N1 - Funding Information:
This work is supported in parts by the National Science Foundation under the grants CCF-1566281, CCF-1526870 and IIP-1632116.
Publisher Copyright:
© 2018 IEEE.
PY - 2018/9/10
Y1 - 2018/9/10
N2 - We consider the problem of super-resolution for sub-diffraction imaging. We adapt conventional Fourier ptychographic approaches, for the case where the images to be acquired have an underlying structured sparsity. We propose some sub-sampling strategies which can be easily adapted to existing ptychographic setups. We then use a novel technique called CoPRAM with some modifications, to recover sparse (and block sparse) images from sub-sampled pty-chographic measurements. We demonstrate experimentally that this algorithm performs better than existing phase retrieval techniques, in terms of quality of reconstruction, using fewer number of samples.
AB - We consider the problem of super-resolution for sub-diffraction imaging. We adapt conventional Fourier ptychographic approaches, for the case where the images to be acquired have an underlying structured sparsity. We propose some sub-sampling strategies which can be easily adapted to existing ptychographic setups. We then use a novel technique called CoPRAM with some modifications, to recover sparse (and block sparse) images from sub-sampled pty-chographic measurements. We demonstrate experimentally that this algorithm performs better than existing phase retrieval techniques, in terms of quality of reconstruction, using fewer number of samples.
KW - Nonconvex algorithms
KW - Phase retrieval
KW - Ptychography
KW - Sparsity
UR - http://www.scopus.com/inward/record.url?scp=85053660521&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85053660521&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2018.8461302
DO - 10.1109/ICASSP.2018.8461302
M3 - Conference contribution
AN - SCOPUS:85053660521
SN - 9781538646588
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 6493
EP - 6497
BT - 2018 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2018 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2018 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2018
Y2 - 15 April 2018 through 20 April 2018
ER -