High-speed spectral imaging via multispectral pulse illumination and temporal-spectral decoupling

Area of Science:

• Optics and Photonics
• Computer Vision
• Image Processing

Background:

• Spectral imaging (SI) systems face limitations in spatial, temporal, and spectral resolution due to bandwidth constraints.
• Existing high-speed SI solutions often involve high complexity, cost, or reduced spatial resolution.

Purpose of the Study:

• To develop a low-cost, high-speed spectral imaging scheme.
• To achieve microsecond-resolved multispectral video acquisition.

Main Methods:

• Developed an active temporal-spectral coupling (TSC) and decoupling (TSD) strategy.
• Utilized a snapshot SI camera and a multispectral LED array for sequential illumination.
• Employed a transformer-based network for information decoupling and reconstruction.

Main Results:

• Achieved high-speed SI up to 240 frames per second (fps).
• Demonstrated microsecond-resolved multispectral video recording.
• Successfully decoupled textural and spectral information for enhanced reconstruction.

Conclusions:

• The proposed framework offers a viable solution for high-speed, high-resolution spectral imaging.
• The active TSC and TSD strategy effectively overcomes traditional SI bandwidth limitations.
• This advancement enables new possibilities in dynamic multispectral video analysis.