Demosaiced pixel super-resolution for multiplexed holographic color imaging

Area of Science:

• Optics and Photonics
• Digital Imaging
• Microscopy

Background:

• Holographic color image synthesis typically involves sequential capture of holograms at different wavelengths (red, green, blue).
• Simultaneous multi-wavelength illumination with a Bayer color sensor offers a 3-fold speed increase but introduces color artifacts due to non-co-located pixels.
• Conventional demosaicing techniques struggle to correct these artifacts in holographic imaging.

Purpose of the Study:

• To develop a novel method for suppressing color artifacts in wavelength-multiplexed holographic color imaging.
• To improve the speed and image quality of holographic color imaging without sacrificing resolution.

Main Methods:

• Integration of pixel super-resolution with color de-multiplexing process.
• Development of the Demosaiced Pixel Super-Resolution (D-PSR) algorithm.
• Validation of D-PSR for holographic microscopy applications.

Main Results:

• Demosaiced Pixel Super-Resolution (D-PSR) significantly suppresses color artifacts in simultaneous multi-wavelength holographic imaging.
• D-PSR achieves performance comparable to sequential illumination methods.
• The D-PSR approach enables a 3-fold increase in the speed of holographic color imaging.

Conclusions:

• Demosaiced Pixel Super-Resolution (D-PSR) effectively overcomes limitations of conventional demosaicing in holographic imaging.
• This method enhances the speed of holographic color imaging by a factor of three.
• D-PSR is broadly applicable to holographic microscopy requiring high-resolution, multi-wavelength imaging.