A theoretical method based on Fourier spectrum analysis for the ... ... is concluded that the X-ray focusing system can be regarded as a kind of Fraunhofer diffraction system. Therefore, a method based on Fourier spectrum analysis is presented to predict the intensity distribution in the focusing plane for the X-ray lenses. A
A watermark strategy for quantum images based on quantum fourier... ... for quantum images. The watermark image is embedded into the fourier coefficients of the quantum carrier image, which will not ... the security of the watermark image. The properties of fourier transform ensure that the watermark embedded in the carrier ...
Adaptive fractional fourier transform-based detection algorithm ... ... clutter. On the basis of detection model of moving target with fluctuant amplitudes, a novel adaptive algorithm in fractional Fourier transform (FRFT) domain is proposed, which combines statistic-based and FRFT-based detection method. FRFT has good energy ...
The Study of Photo-Elastic Modulator-Based Fourier Transform Spe...In order to enhance the spectrum resolution of current photo-elastic modulator-based Fourier transform spectrometer, a multi-reflected photo-elastic modulator-based interferometer structure was proposed in the present paper. Through coating reflecting ...
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