Acceleration of fully computed hologram stereogram using lookup table and wavefront recording plane methods

Area of Science:

• Optics and Photonics
• Computer Graphics
• Computational Imaging

Background:

• Hologram stereograms (HSs) offer realistic 3D image reconstruction.
• High computational cost and storage requirements hinder widespread HS application.
• Existing methods often rely on approximations, limiting accuracy or hogel size.

Purpose of the Study:

• To develop computationally efficient methods for generating fully computed hologram stereograms (HSs).
• To maintain accuracy and avoid limitations on hologram element (hogel) size.
• To reduce the computational load and storage space for HS generation.

Main Methods:

• Lookup Table (LUT) method: Precalculating spherical wave phases for rapid segment cropping and hogel calculation.
• Wavefront Recording Plane (WRP) method: Placing a WRP near the 3D scene to further accelerate computation and reduce storage.
• Utilizing LUT referencing to replace complex calculations, ensuring accuracy.

Main Results:

• Simulations and optical experiments demonstrated the effectiveness of both LUT and WRP methods.
• The proposed methods significantly reduced computational load compared to traditional approaches.
• Accurate reconstruction of quality 3D images was achieved without hogel size limitations.

Conclusions:

• LUT and WRP methods provide an accurate and efficient solution for computing hologram stereograms.
• These techniques overcome the computational and storage limitations of previous HS generation methods.
• The proposed approach enables high-quality 3D image reconstruction with reduced resources.