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Roxana Alexandru

6 accepted papers

2022

Convolutional ISTA Network with Temporal Consistency Constraints for Video Reconstruction from Event Cameras

ICASSP 2022accepted

Event cameras produce streams of events with high temporal resolution which do not suffer from motion blur. Current deep networks achieve high-quality video reconstruction from events, but most of them are large and difficult to interpret. In this work, we present a solution to this problem by syste…

Cited by 0SourceScholar
2022

Perfect Reconstruction of Classes of Non-Bandlimited Signals from Projections with Unknown Angles

ICASSP 2022accepted

In this paper, we consider the 2D tomography problem for a finite number of point sources, where the line integral projections are taken at unknown angles. We address the problem of recovering the point sources and estimating the projection angles. Using the property of the Radon transform of a poin…

Cited by 0SourceScholar
2021

Guaranteed Reconstruction from Integrate-and-Fire Neurons with Alpha Synaptic Activation

ICASSP 2021accepted

Time encoding of continuous time signals is an alternative to classical sampling paradigms. The signal is encoded in the timing of output samples rather than their amplitudes. Of particular interest are integrate-and-fire time encoding machines (IF-TEM) for sampling signals with finite rate of innov…

Cited by 0SourceScholar
2020

Sampling Classes of Non-Bandlimited Signals Using Integrate-and-Fire Devices: Average Case Analysis

ICASSP 2020accepted

We investigate the use of integrate-and-fire systems to efficiently sample classes of non-bandlimited signals such as bursts of spikes. The sampling in this case is based on storing some timing information about the signal, and no information about its amplitude. We demonstrate that perfect reconstr…

Cited by 0SourceScholar