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- Fourier transform of image 图象傅里叶变换
- Along with the rapid development of computer software and hardware technology, the discrete fourier transform (DFT) has become one kind of important means of image processing. 随着计算机软件、硬件技术的迅速发展 ,离散傅里叶变换已经成为图像处理的一种重要手段。
- An algorithm of image region shifting encode is proposed.Combing it and fractional Fourier transform, multi-channel image encryption encode is implemented. 摘要提出了图像区域移位编码算法,并结合分数傅立叶变换,实现了对图像的多重加密编码。
- Fractional Fourier transform of apertured paraboloid refracting system[J]. 引用该论文 陈建农;闫金良;王德法;于永江.
- The characters of the fast Fourier transform of the free space impulse response are different at different distance, so the quality of the reconstructed image by the convolution isn't perfect. 自由空间脉冲响应的快速傅里叶变换在不同的记录距离性质不同,由瑞利-索末菲衍射积分利用卷积方法得到的再现像质不理想;
- The information that sensor-fuzed munitions received comes down to Fast Fourier Transform (FFT) about the analysis of power chart in the research of image disposal and signal processing of sensor-fuzed munitions. 本文在对末敏弹的图像和数据信号处理的研究中发现,当对末敏弹接收的信息进行功率谱分析的时候要涉及到快速傅立叶变换。
- Fractional Fourier transform of hard-edge apertured and misaligned Lohmann's optical system[J]. 引用该论文 于永江;陈建农;王德法;郝金光.
- According to the line theory, Fourier transformation of strength distribution function for annular grating image has been obtained. 根据线性系统理论得到环形光栅像强度分布函数的付里叶变换。
- Fourier transform of any grade can be realized in the free space of Fres-nel diffraction on spherical wave illuminating objects. 通过球面波照明物体的自由空间菲涅耳衍射,实现任意级次分数傅里叶交换,指出了菲涅耳衍射与分数傅里叶变换的一致性。
- This suggests using a resolvent whose roots may be variously described as a discrete Fourier transform or a Hadamard matrix transform of the roots. 就像其它 多项式,有时可能对一个四次方程分解出因式;但更多的时候这样的工作是极困难的,尤其是当根是无理数或复数时。
- We have showed that the Radon transform of the cross Wigner distribution function is a separable multiplication of fractional Fourier transform of these functions. 分析了交叉魏格纳分布函数中的拉冬变换是这些函数中分数傅里叶变换的可分乘法。
- In this paper, without any approximation, we calculate the strict Fourier transform of Voigt function, and testify the Fourier transform of Voigt function can be finished. 本文在没有采用任何近似的条件下,对佛克脱函数的傅立叶变换进行了精确的理论计算,证明其傅立叶变换是可以严格求解的。
- To solve the aberrance problem of electromagnetic signals caused by Fourier transform of limited time and discrete sampling, the function and the influence of windows with different scales were discussed. 摘要针对电磁法物探观测信号离散傅立叶变换中信号畸变问题,研究了不同尺度窗口对信号分析的作用和影响。
- Then Fourier transform of circular, cylindrical or spherical array, which are composed of transform bases basedon Bessel function or spherical function respectively, are also studied theoretically and experimentally. 接着,对分别以贝塞尔函数或球函数为基的圆、圆柱或球阵的傅立叶波束形成进行了理论研究和仿真实验。
- In this paper, the Fourier transform of Lorentzian function is calculated, and then based on which, we analysis the principle of the upper atmospheric wind field detection based on Lorentzian profile. 本文对洛伦兹函数的傅立叶变换进行了计算。在此基础上,对洛伦兹光谱线型高层大气风场探测的原理进行了分析。
- The exact Fourier transform of the object can be obtained when it is placed at the front focal plane of the hololens.At the end of this paper, the optical experimental results are given. 当物体位于偏离主轴的前焦面时,能够得到物体准确的傅里叶变换。
- Bicubic interpolation is a classical algorithm used in spacial transformation of image such as image rotation and zooming. 摘要 双三次插值是图像空域变换的经典算法,可用于图像旋转和放缩等灰度插值。
- As a Fourier transformation of time correlation function the Wigner distribution is always called "time-frequency energy distribution". 摘要维格纳分布被表述为时间相关函数的傅立叶变换,称为信号“时-频能量分布”。
- An ounce of image is worth a pound of performance. 一盎司的形象胜过一磅重的表现。
- Using discrete Fourier transform for interpolation of 3-D MT data. 用傅氏变换实现三维MT数据的插值