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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。
- Using a method of the spatial frequency filtering by combining the directional filtering with the very low frequency filtering, the desirable optical signals cau be taken out of a considerably complex image. 采用方向性滤波与极低频滤波相结合的方法;可以从较复杂的图象中提取所需用的信号.
- optical spatial frequency filter 光学空间频率滤色器
- It includes topics such as spatial frequency filtering, holography 它包括空间频率滤光、全息摄影。
- spatial frequency filtering 空间频率的滤波
- 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。
- 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;
- Method of insertion loss measurement for radio frequency filters. 射频滤波器插入损耗的测量方法。
- 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。
- 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;
- The invention discloses a high frequency filter for filtering a frequency component from a high frequency signal includes a capacitor and a branch line. 本发明公开了一种高通滤波器，用于从高频信号中对频率分量进行滤波，该高通滤波器包括电容器和支路。
- 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。
- 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。
- Delivering breathtaking scope for creativity, consummate clarity and a world first in terms of its Effect Frequency Filter, the ingenious new DJM-700 is dramatically different. 发表惊人的创意空间,完善和清晰的世界第一来说,其效果频滤波器,巧妙新粉喷桩-700是大大不同。
- 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。
- The PZT matching layer redistributes the frequency spectrum of an original broadband ultrasonic probe, and acts as a frequency filter without reducing the wave amplitude. 此层锆钛酸铅匹配层可将原本超音波探头之宽频率分布过滤成某些特定频率之峰值，且没有降低该频率峰值相对于原始探头强度之强度。
- 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。
