TVFP

Total variation regularization-based Fourier ptychography (TVFP)<br>_{Matlab implementation of the TVFP / eTVFP}

Jiachen Wu, Feng Yang, and Liangcai Cao, "Resolution enhancement of long-range imaging with sparse apertures," Optics and Lasers in Engineering 155, 107068 (2022).

<p align="center"> <img src="https://github.com/THUHoloLab/TVFP/blob/master/figures/fig1.png" width="500"> </p>

Resolution enhancement of long-range imaging with sparse apertures<br> Jiachen Wu, Feng Yang, Liangcai Cao*<br>

• Paper link for TVFP / eTVFP <a href="https://www.sciencedirect.com/science/article/abs/pii/S0143816622001208"></a>.
• Paper download for TVFP / eTVFP <a href="https://github.com/THUHoloLab/TVFP/raw/master/figures/OLEN-jiachen.pdf"></a>.
• Contact: wjc18@tsinghua.org.cn
• Contact: clc@tsinghua.edu.cn

Release notes

• demo_TVFP_resChart.m - demonstrate the TVFP algorithm to reconstruct amplitude-only objects (resolution chart)
• demo_TVFP_complex.m - demonstrate the TVFP algorithm to reconstruct complex objects
• demo_eTVFP.m - demonstrate the eTVFP algorithm which could estimate pupil function
• demo_realData.m - demonstrate the reconstruction for real data

Performance evaluation

Reconstructions for different overlapping ratio. (a) Reconstructed images under different overlapping ratio with Gaussian noise using different algorithms (Gauss-Newton, TPWFP, FPSR, and TVFP). (b) PSNR for reconstructed images from measurements without noise. (c) PSNR for reconstructed images from measurements with 20 dB SNR Gaussian noise.

<p align="center"> <img src="https://github.com/THUHoloLab/TVFP/blob/master/figures/fig2.png" width="700"> </p>