Adding a single on-axis defocused image to a standard Fourier ptychographic microscopy dataset and using transport-of-intensity reconstruction as the initial guess recovers missing low-frequency phase information.
Fourier ptychography: current applications and future promises,
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Fourier ptychographic microscopy aided with transport of intensity equation for robust full phase spectrum reconstruction
Adding a single on-axis defocused image to a standard Fourier ptychographic microscopy dataset and using transport-of-intensity reconstruction as the initial guess recovers missing low-frequency phase information.