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Shaban B Sulejman¹, Niken Priscilla², Lukas Wesemann²

¹ARC Centre of Excellence for Transformative Meta-Optical Systems, School of Physics, The University of Melbourne, Melbourne, VIC, 3010, Australia. sulejmans@unimelb.edu.au.

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Summary

This study introduces a novel all-optical image processing method using spatial frequency filtering to create real-time pseudo-3D images of biological samples, like cancer cells, for label-free imaging.

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Area of Science:

Optics and Photonics
Biomedical Imaging
Image Processing

Background:

Spatial frequency content is crucial for many image processing tasks.
Traditional methods often require complex setups or labels for biological samples.

Purpose of the Study:

To demonstrate an all-optical spatial frequency filtering technique for image processing.
To generate real-time pseudo-3D images of transparent samples.
To explore applications in label-free biological cell imaging.

Main Methods:

Utilizing the angular sensitivity of a commercial spectral bandstop filter.
Implementing object-plane spatial frequency filtering.
Applying the technique to transparent biological samples, including human cervical cancer cells.

Main Results:

Successful generation of real-time pseudo-3D images.
Demonstration of label-free imaging capabilities.
Validation of the method on biological samples.

Conclusions:

The developed all-optical spatial frequency filtering offers a promising approach for real-time image processing.
This non-local, non-interferometric method has significant potential for label-free biological cell imaging and dynamical monitoring.