Interferometry based multispectral photon-limited 2D and 3D integral image encryption employing the Hartley transform

Area of Science:

• Optics and Photonics
• Image Processing
• Information Security

Background:

• Multispectral 3D photon-counted integral imaging (PCII) offers rich data but requires secure methods.
• Traditional encryption techniques can be complex or suffer from phase sensitivity.
• Existing methods may not fully leverage the unique properties of photon counting detection.

Purpose of the Study:

• To develop and validate a secure encryption method for multispectral 3D PCII.
• To address limitations of existing encryption techniques, such as complexity and phase sensitivity.
• To utilize the advantages of photon counting detection for enhanced 3D scene authentication.

Main Methods:

• Employing classical Hartley Transform (HT) based encryption within an optical interferometry framework.
• Utilizing photon counting detection for sparse sensing and nonlinear transformation capabilities.
• Validating the method through simulations for 2D and 3D cases and experimental data processing.

Main Results:

• The proposed method simplifies complexity by eliminating holography recording.
• It effectively addresses the phase sensitivity issues common with digital cameras.
• Demonstrated feasibility for securing multispectral 3D PCII with improved authentication at various depth cues.

Conclusions:

• The Hartley Transform-based encryption offers a feasible and secure solution for multispectral 3D PCII.
• The technique is compatible with both spatially and temporally incoherent illumination.
• This approach enhances the security and authentication of 3D reconstructed scenes from PCII data.