title: Content adaptive illumination for Fourier ptychography.
abstract: Fourier ptychography (FP) is a recently reported technique, for large field-of-view and high-resolution imaging. Specifically, FP captures a set of low-resolution images, under angularly varying illuminations, and stitches them together in the Fourier domain. One of FP's main disadvantages is its long capturing process, due to the requisite large number of incident illumination angles. In this Letter, utilizing the sparsity of natural images in the Fourier domain, we propose a highly efficient method, termed adaptive Fourier ptychography (AFP), which applies content adaptive illumination for FP, to capture the most informative parts of the scene's spatial spectrum. We validate the effectiveness and efficiency of the reported framework, with both simulated and real experiments. Results show that the proposed AFP could shorten the acquisition time of conventional FP, by around 30%-60%.
authors.forename: Liheng
authors.initials: L
authors.lastname: Bian
authors.forename: Jinli
authors.initials: J
authors.lastname: Suo
authors.forename: Guohai
authors.initials: G
authors.lastname: Situ
authors.forename: Guoan
authors.initials: G
authors.lastname: Zheng
authors.forename: Feng
authors.initials: F
authors.lastname: Chen
authors.forename: Qionghai
authors.initials: Q
authors.lastname: Dai
mesh_terms: D000818:Animals; D001921:Brain / Q000166:cytology; D005583:Fourier Analysis; D007091:Image Processing, Computer-Assisted; D051379:Mice; D061848:Optical Imaging / Q000379:methods*