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关键字：fourier

  • Fiber-optic Fourier-domain common-path OCT We experimentally and theoretically investigated the performance of a fiber-optic based Fourier-domain common-path optical coherence tomography (OCT). The fiber-optic common-path OCT operated at the 840-nm center wavelength. The resolution of the system ...
  • Spatial Fourier-decomposition optical fluorescence tomography-th... ... imaging scheme is proposed with structured illumination and spatial Fourier-domain decomposition methods for the first time. In this spatial Fourier-decomposition optical fluorescence tomography (SF-OFT), the intensity of focused excitation light from an ...
  • Characterizationof matrix fourier multipliers for A-dilation Par... Characterizationof matrix fourier multipliers for A-dilation Parseval multiwavelet frames
  • Color pattern recognition based on the joint fractional Fourier ... A new system of multi-channel single-output joint fractional Fourier transform correlator (JFRTC) for color pattern recognition is proposed based on the conventional system of multi-channel single-output joint transform correlator (JTC). The theoretical ...
  • Analysis of eccentric photorefraction by Fourier optics ... , the crescent formation and the light-intensity distribution in the pupil image of a myopic eye are analyzed by Fourier optics with the assumption of an isotropic scattering retina. In the case of little circular light source and rectangular slit, the ...
  • Fractional Fourier transform of apertured paraboloid refracting ... ... condition of paraboloid refracting system in performing fractional Fourier transform acts like an aperture, which makes the ... , a more practical approximate analytical solution of fractional Fourier transform of Gaussian beam in an apertured paraboloid ...
  • Automatic Fourier transform and self-Fourier beams due to a para... Automatic Fourier transform and self-Fourier beams due to a parabolic potential
  • Four-quadrant spatial phase-shifting Fourier transform digital h... A new one-step four-quadrant spatial phase-shifting Fourier transform digital holography is presented for recording of ... coefficients, because cosine transform is a real-even symmetric Fourier transform. This approach implements four quadrant spatial phase ...
  • The optimum scheme of a static Fourier-transform spectrometer ba... An optimum design of static Fourier-transform spectrometer based on Savert prisms is presented in this paper. A new method of increasing path difference and resolution of spectrometer is given. When the angle between the crystal optical axis of the first ...
  • 快速高精度Fourier-Mellin变换图像配准方法 提出一种快速高精度Fourier-Mellin变换图像配准方法，可提高高光谱成像过程中光谱复原的速度与精度。该方法运用两次局部上采样相位相关法，一次在对数极坐标域中估计旋转和缩放参数，另一次在笛卡尔坐标系中估计平移参数。引入梯度预处理过程，使算法更加稳健。介绍了Fourier-Mellin变换的原理，该变换可实现旋转和缩放参数的解耦合。在传统相位相关法的基础上介绍了局部上采样相位相关法。证明了梯度预处理过程的必要性。仿真结果表明，所提方法可以实现高精度的图像配准。