Broad dual-band temporal compressive imaging with optical calibration

Area of Science:

• Optics and Imaging
• Remote Sensing
• Bio-imaging

Background:

• Multispectral imaging offers richer data than single-band for applications like remote sensing and bio-imaging.
• Acquiring high-speed images of moving objects with multispectral systems is challenging.
• Existing systems struggle with capturing dynamic scenes across multiple spectral bands simultaneously.

Purpose of the Study:

• To develop a Digital Micromirror Device (DMD)-based temporal compressive imaging (TCI) system.
• To achieve simultaneous high-speed imaging of moving objects in both visible and near-infrared (NIR) spectral bands.
• To investigate and implement nonuniform calibration strategies to improve image reconstruction quality.

Main Methods:

• Utilized a DMD-based temporal compressive imaging (TCI) system.
• Acquired dual-band images (visible and NIR) of high-speed moving objects.
• Studied and applied four nonuniform calibration strategies to correct optical degradations.
• Reconstructed images of objects obscured by paint or diffusers.

Main Results:

• Successfully obtained high-speed, dual-band images of moving objects.
• Demonstrated superior image reconstruction performance using the calibrated TCI system.
• Validated the effectiveness of the nonuniform calibration strategies for improving image quality.
• Showcased the system's capability in challenging scenarios, including obscured objects.

Conclusions:

• The DMD-based dual-band TCI system enables high-speed imaging across visible and NIR bands.
• Nonuniform calibration strategies significantly enhance the reconstruction quality of compressive imaging systems.
• This calibrated system offers superior performance for capturing dynamic scenes in multispectral applications.