pyDHM: A Python library for applications in digital holographic microscopy
Fig 7
Example of the angular spectrum approach to numerically focus a hologram using a circular spatial filter tool.
Panel (a) is the sample code. Panels (b)-(d) show the hologram (b) and its spectrum without (c) and with (d) a circular mask. Panels (e)-(g) are the reconstructed intensity images for three propagation distances (z).