Figure 4
Lens-free imaging using multi-height phase retrieval and wavelength-scanning pixel super-resolution. Five heights are used in each case shown in a–c. (a, b) are lens-free reconstructions using lateral shift-based pixel super-resolution and multi-height phase retrieval. a uses five and b uses nine sub-pixel-shifted raw measurements at each height. (c) Lens-free reconstruction using wavelength-scanning pixel super-resolution and multi-height phase retrieval; five wavelengths are used with a scanning range of 498–510 nm and a scan step size of 3 nm.
