Computational Imaging for VLBI Image Reconstruction

12/04/2015
by   Katherine L. Bouman, et al.
0

Very long baseline interferometry (VLBI) is a technique for imaging celestial radio emissions by simultaneously observing a source from telescopes distributed across Earth. The challenges in reconstructing images from fine angular resolution VLBI data are immense. The data is extremely sparse and noisy, thus requiring statistical image models such as those designed in the computer vision community. In this paper we present a novel Bayesian approach for VLBI image reconstruction. While other methods often require careful tuning and parameter selection for different types of data, our method (CHIRP) produces good results under different settings such as low SNR or extended emission. The success of our method is demonstrated on realistic synthetic experiments as well as publicly available real data. We present this problem in a way that is accessible to members of the community, and provide a dataset website (vlbiimaging.csail.mit.edu) that facilitates controlled comparisons across algorithms.

READ FULL TEXT

page 1

page 4

page 6

page 7

page 8

research
01/18/2022

Generalized sparse Bayesian learning and application to image reconstruction

Image reconstruction based on indirect, noisy, or incomplete data remain...
research
01/22/2021

AS-Net: Fast Photoacoustic Reconstruction with Multi-feature Fusion from Sparse Data

Photoacoustic (PA) imaging is a biomedical imaging modality capable of a...
research
11/03/2017

Reconstructing Video from Interferometric Measurements of Time-Varying Sources

Very long baseline interferometry (VLBI) makes it possible to recover im...
research
07/02/2015

Distributed image reconstruction for very large arrays in radio astronomy

Current and future radio interferometric arrays such as LOFAR and SKA ar...
research
08/25/2022

Image Reconstruction by Splitting Expectation Propagation Techniques from Iterative Inversion

Reconstructing images from downsampled and noisy measurements, such as M...
research
10/24/2011

New Zealand involvement in Radio Astronomical VLBI Image Processing

With the establishment of the AUT University 12m radio telescope at Wark...
research
06/17/2022

OADAT: Experimental and Synthetic Clinical Optoacoustic Data for Standardized Image Processing

Optoacoustic (OA) imaging is based on excitation of biological tissues w...

Please sign up or login with your details

Forgot password? Click here to reset