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(a) Single-shot off-axis hologram recorded on the CCD camera. Fine fringes are seen across the entire image. (b) 2D-FFT of the image in (a). The cross-correlation terms containing the electric field information are clearly visible and shifted away from DC because of the off-axis geometry, allowing direct filtering of the area shown in red. (c) Resulting quantitative phase map of a neuron after filtering, inverse 2D-FFT and 2D phase unwrapping.
