Interface Tracking in Digitally Recorded Glaciological Data

How fast can one numerically reconstruct digitally recorded holograms?

Results of comparative study of the computational complexity of different algorithms for numerical reconstruction of electronically recorded holograms are presented and discussed. The following algorithms were compared: different types of Fourier and convolutional algorithms and a new universal DCT-based algorithm, in terms of the number of operations. Based on the comparison results, the feasi...

Tracking neurons recorded from tetrodes across time.

Tetrodes allow isolation of multiple neurons at a single recording site by clustering spikes. Due to electrode drift and perhaps due to time-varying neuronal properties, positions and shapes of clusters change in time. As data is typically collected in sequential files, to track neurons across files one has to decide which clusters from different files belong to the same neuron. We report on a ...

Comment on “Single-shot speckle reduction in numerical reconstruction of digitally recorded holograms”

We comment on a recent Letter by Hincapie et al. [Opt. Lett. 40, 1623 (2015)] [1] in which the authors proposed a method to reduce the speckle noise in digital holograms. This method was previously published by us in Maycock [2] and Maycock and Hennelly [3]. We also wish to highlight an important limitation of the method resulting from the superposition of different perspectives of the object/s...

Single-shot speckle reduction in numerical reconstruction of digitally recorded holograms.

A single-shot method to reduce the speckle noise in the numerical reconstructions of electronically recorded holograms is presented. A recorded hologram with the dimensions N×M is split into S=T×T sub-holograms. The uncorrelated superposition of the individually reconstructed sub-holograms leads to an image with the speckle noise reduced proportionally to the 1/S law. The experimental results a...

Discrete transforms, fast algorithms, and point spread functions of numerical reconstruction of digitally recorded holograms