Utilization of image phase information to achieve super-sampling

摘要

For image phase-based super-sampling, an image sequence consisting of slightly displaced frames is up-sampled, aligned, and averaged into a single larger image that possesses image resolution exceeding the limitations of the imaging system. This process obtains a significant portion of high-resolution phase information and models the missing magnitude using deconvolution or reconstruction algorithms. Three simulations are presented in which a 32-frame sequence with the size 256 by 256 pixels is processed to create a single 4096 by 4096 pixel image with pixel level resolution. An empirical test was also conducted showing resolution beyond the digital sampling resolution limit of the camera. (C) 2020 Optical Society of America.