Fresnel Reconstruction Algorithm and Angular Spectrum Algorithm for Digital Holography
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Fresnel reconstruction algorithm and angular spectrum algorithm are widely applied in digital holography image processing. These algorithms enable high-quality reconstruction of digital holographic images through techniques such as spectral filtering. The implementation typically involves Fourier transforms and phase calculations using functions like fft2() and ifft2() in MATLAB. By propagating the wavefront through diffraction calculations, these methods can achieve realistic and detail-rich image reproduction. The angular spectrum approach uses plane wave decomposition while Fresnel method applies parabolic approximation for numerical propagation. Research and application of digital holography have created new development opportunities across various fields including microscopy, metrology, and 3D display technologies.
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