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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

Published on: February 12, 2014

Terahertz imaging with compressed sensing and phase retrieval.

Wai Lam Chan¹, Matthew L Moravec, Richard G Baraniuk

¹Department of Electrical and Computer Engineering, Rice University, 6100 Main Street, Houston, Texas 77005, USA. wailam@rice.edu

|May 3, 2008

Summary

This study introduces a high-speed terahertz (THz) imaging system using compressed sensing (CS). The novel approach reconstructs images using significantly fewer data points, improving efficiency and quality.

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Area of Science:

Physics
Electrical Engineering
Computer Science

Background:

Terahertz (THz) imaging offers unique capabilities for non-destructive analysis.
Traditional Fourier imaging requires extensive data acquisition, limiting speed and efficiency.
Compressed sensing (CS) is an emerging signal processing technique for efficient data acquisition.

Purpose of the Study:

To develop and demonstrate a high-speed pulsed terahertz (THz) Fourier imaging system.
To leverage compressed sensing (CS) for reduced data requirements in THz imaging.
To evaluate the impact of phase correction on image reconstruction quality.

Main Methods:

Implementation of a novel, high-speed pulsed THz Fourier imaging system.
Application of compressed sensing (CS) theory for image reconstruction from a subset of Fourier plane pixels.
Utilizing phase correction algorithms to enhance image reconstruction quality.

Main Results:

Successful reconstruction of a 64 x 64 object image with 1.4 mm pixel size.
Demonstrated image reconstruction using only approximately 12% of the required Fourier plane pixels.
Observed significant improvement in reconstruction quality with the application of phase correction.

Conclusions:

The developed CS-based THz imaging system enables high-speed image acquisition and reconstruction.
The system effectively reduces the number of required measurements for THz imaging.
This technology shows potential for advanced THz imaging applications, including with continuous-wave (cw) sources.