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- It includes topics such as spatial frequency filtering, holography. 它包括空间频率滤光、全息摄影。
- The sampling clock frequency error can cause ICI. 采样时钟频率偏差将导致ICI。
- Luminance masking and spatial frequency masking were considered in our scheme. 此方法考虑了人的视觉所具有的亮度屏蔽和空间频率屏蔽特性。
- The results revealed mild lowering contrast sensitivity at high spatial frequency for our glaucoma patients. 然而特定轴度之闪光眩耀测试结果并未见明显差别。
- The Collins formula and tensor ABCD law in spatial frequency domain provide the relation between the input spatial Fourier spectrum and the output spectrum directly. 空间频率域中的柯林斯公式和张量ABCD定律直接给出了像散光束的空间傅里叶频谱的传输规律。
- Analyzed is the dependence of the defocusing quantity on the hologram size and the spatial frequency bandwidth of the object. 分析了全息图尺寸及其记录的空间频带宽度与离焦量的关系;
- A robust CAB algorithm is proposed in this paper which overcomes the sensitivity to the Cycle Frequency Error (CFE). 针对这一不足,本文提出了对循环频率误差稳健的循环自适应波束形成算法。
- The diffraction of surface acoustic waves in Raman-Nath regime on acoustic grating with linearly chirped spatial frequency is investigated. 本文将声表面波声栅上的Raman-Nath衍射现象研究发展到其周期的空间频率为线性变化的声栅情形。
- Differing from frequency error track, it avoid spurious modulation and complexity caused by phase-locked loops. 与频率误差跟踪不同，它避免了锁相环引入的寄生调制和复杂性。
- The effects of radial position and the axial length of the electrode on the temporal frequency bandwidth are similar to the spatial frequency domain. 在时间频域内测量系统相当于带通滤波器,电极的轴向长度和颗粒径向位置对频带宽度的影响与空域频率特性相似;
- Method Modulation transfer function (MTF) was used to analyze the spatial frequency transfer characteristics of CT and MRI. 调制传输函数可对线性影像系统的频率传输特性进行描述。
- Our results of the SAWF ares insertion loss about 8 dB, centre frequency error less than 60 kHz and Q value more than 590. 实验结果;主要技术性能指标达到插入损耗约8 dB;中心频率偏差小于60kHz;Q值则超过590.
- A new spatial frequency analysis method based on wavelet was applied to homomorphic filtering to enhance the contrast of ICT image. 针对ICT图像对比度低、边缘模糊、细节不清晰等问题,提出采用基于小波的同态滤波算法来对图像进行增强。
- A method of super-resolution imaging is described, which utilizes cosine fringes to acquire more spatial frequency spectrum of the object. 研究了一种高分辨率成像的方法，该方法利用余弦条纹照射目标以获取目标更宽的频谱。
- Lastly, The jamming effectiveness is emphatically analyzed in the presence of bit error, bit width error and carrier frequency error. 最后分析了干扰信号在存在误码、元宽度误差以及载频误差情况下的干扰效果。
- Under Tie-Line Bias Control (TBC) pattern, the area frequency modulation performance is affected directly by the value of frequency error factor k in area control error (ACE). 在TBC控制模式下,区域控制偏差(ACE)中频率偏差系数k的取值直接影响区域调频性能。
- Nyquist frequency defined as the highest spatial frequency where the sensor can still faithfully record image detail. Beyond the Nyquist frequency aliasing occurs. 奈奎斯特频率的定义是：感光器能够忠实纪录影像细节的最高空间频率。在此频率以上就会发生混肴现象。
- A more accurate way to look at the sensitivity of an imaging system is to evaluate the Detective Quantum Efficiency (DQE) as a function of spatial frequency. 研究成像系统灵敏度的一个更精确的办法是精确一个考虑成像系统是将量子检测效率(DQE)当作空间频率的函数来计算。
- The main part of controlling system is a Monolithic Processor 89C51, digital filtering, phase measuring and frequency error calculating were accomplished by software. 选用89C51单片计算机作为控制系统核心，由软件完成数字滤波、相位检测及频率偏移量计算；
- Methods The fractures of the ribs of 512 patients were suspected in clinic, and those CR images were processed with gradation and spatial frequency technology. 方法对临床怀疑肋骨骨折512例患者的肋骨CR影像应用谐调处理与空间频率处理的方法进行技术处理。
