A Fast Phase Distortion Compensation Method Based on Downsampled Phase Distortion Principal Component Analysis
A technology of principal component analysis and phase distortion, which is applied to the analysis of materials, material analysis through optical means, and the use of optical devices, etc., can solve the problems of large amount of calculation and increased calculation time, so as to ensure the accuracy of phase distortion compensation and improve Effects of phase distortion compensation speed and calculation time reduction
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[0019] combine figure 1 , the present invention is based on a fast phase distortion compensation method based on down-sampling phase distortion principal component analysis, and first obtains a hologram by using a digital holographic microscope system. Then the frequency spectrum of the hologram is obtained by Fourier transform. Then extract the +1 spectrum, remove the remaining spectrum, and translate the +1 spectrum to the center of the spectrum. Then the phase distortion principal component spectrum is extracted from the +1 order spectrum. And use the inverse Fourier transform to extract the phase map of the downsampled object. Then use singular value decomposition to extract the first principal component of the phase map. Then use the least squares method to fit the parabolic equation in the x and y directions. Next, after excluding the error points, fit again to obtain an accurate parabolic equation in the x and y directions. Then sub-pixel interpolation is performed...
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