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Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform

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Published on: February 12, 2014

Coherent diffraction imaging by moving a lens.

Cheng Shen, Jiubin Tan, Ce Wei

|July 28, 2016

Summary

This summary is machine-generated.

This study introduces a simple, accurate method using the extended fractional Fourier transform for reconstructing object amplitude and phase. It offers a faster, less computationally intensive alternative to traditional imaging techniques.

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Area of Science:

Optics and Photonics
Digital Image Processing
Computational Imaging

Background:

Accurate reconstruction of complex amplitude (amplitude and phase) is crucial for various imaging applications.
Traditional methods like inline holography can be complex and computationally intensive.
Single-lens imaging systems often face challenges in retrieving both amplitude and phase information accurately.

Purpose of the Study:

To develop a simple and accurate method for determining the amplitude and phase of an object using a single moveable lens.
To introduce and implement a fast algorithm for the extended fractional Fourier transform (EFT) for single-lens imaging.
To reconstruct the complex amplitude of an object with improved accuracy and reduced computational load compared to existing methods.

Main Methods:

Utilized a moveable lens setup for data acquisition.
Introduced the extended fractional Fourier transform (EFT) to handle single-lens imaging.
Developed a fast convolution-based algorithm for computing the EFT.
Combined EFT with a parallel iterative phase retrieval algorithm for object reconstruction.

Main Results:

Successfully reconstructed the complex amplitude of objects using the proposed method.
Demonstrated a simpler and easier implementation compared to inline holography.
Achieved reduced computational load by avoiding oversampling operations.
Showcased superior accuracy over direct focusing measurement, especially for small objects.

Conclusions:

The proposed single-lens imaging method based on EFT provides a simple, accurate, and computationally efficient approach for complex amplitude reconstruction.
This technique offers significant advantages over traditional methods like inline holography and direct focusing measurements, particularly for high-resolution imaging of small objects.