In this paper, the DOA estimation is implemented by spatial frequency spectrum analysis.
本文从空间频谱分析的角度来实现这一估计。
The spatial frequency ratio which could reflect regional similarity among images was defined.
②定义了能够反映图像之间区域相似程度的空间频率比概念。
A new multi-focus image fusion method using spatial frequency (SF) and morphological operators is proposed.
本文提出了一种新型的基于空间频率和数学形态学算子的多聚焦图像融合算法。
In this paper, we introduce a new optical processing system utilizing reflecting spatial frequency filtering.
本文作者经过一系列的实验，研究出一种新的反射式滤波的光学处理系统。
These spatial frequency band errors degrade optical performances significantly and are difficult to be controlled.
这些空间频带误差的存在严重影响了系统的光学性能，且难以得到控制。
The filtering in spatial domain, spatial frequency domain and a system of optical formatting imagines are also analyzed.
同时也分析了空域滤波、空频域滤波、光学成像系统。
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。
In processing of array signal, Direction of Arrival (DOA) of target can be obtained by extracting spatial frequency of echo.
在阵列信号处理中，提取回波信号中的空间频率，可以得到目标的方位信息。
High spatial frequency terms of the turbulent spectrum are sampled and low spatial frequency terms are revised using this treatment.
该算法既可对湍流的高频谱抽样，亦可对湍流的低频谱进行修正。
The relationships between the spatial frequency response features and toad's behaviors, and the biological significance were discussed.
并对空间频率特性与蟾蜍行为之间的关系和生物学的意义做了初步探讨。
Contrast, spatial frequency, presentation time, moving velocity and phase reversal frequency of each grating are controlled independently.
每组光栅的对比度、空间频率、显示时间，移动速度和反相频率能单独控制。
Objective To investigate the influence of word frequency, spatial frequency, character strokes and myopia status in identifying Chinese characters.
目的探讨字频、空间频率、笔画数和近视程度对汉字图片辨认正确率的影响。
Based on uniform circular array and its elements output signal delay, a novel method for estimation of spatial frequency, azimuth and elevation is presented.
本文基于圆阵列及其输出时延提出了一种空间信号频率、方位角和仰角的联合参数估计新方法。
Standard four periodical rectangular patterns with typical spatial frequency and radiometric temperature were generated according to signal transfer equation.
该方法从红外成像系统信号传递方程出发，模拟生成不同空间频率、辐射温度的标准四周期矩形样条；
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。
Different scenes are analyzed in the power spectrum spatial frequency domain, it can be shown that the power spectrum of most natural scenes is of invariability.
用功率谱的方法对任意景物在空间频域进行分析表明，功率谱对于自然景物具有一定的不变性。
This paper introduces the image block segmentation into the multi-focus image fusion, and USES wavelet spatial frequency as the multi-focus image clarity indicator.
本文将图像块分割引入多聚焦图像融合中，以小波空间频率作为多聚焦图像的清晰度指标。
The cut-off spatial frequency is got higher at the cost of the loss of mid-spatial frequency, and the information got by the system are different in all directions.
合成孔径成像系统在获得高截止频率的同时，降低了系统的中频性能，并且合成孔径成像系统的信息获取在方向上具有可选择性。
The angular distribution of the bistatic scattering cross-section from fractal sea surface for different fractal dimension and different spatial frequency is analyzed.
分析了不同分维下分形海面双站散射截面的角分布情况。
The disinhibitory IF of subcortical neurons contributes to transmission of low spatial frequency information of visual images and tO the maintenance of color constancy.
皮层下神经元的去抑制整合野参与传递视觉图像中的低空间频率信息，并与色觉恒定性机制有关。
Using optical imaging based on intrinsic signals, we studied spatial frequency tuning characteristics of cat primary visual cortex at different visual topological locations.
采用基于内源信号的脑光学成像方法，在大范围视皮层研究了不同空间拓扑位置对应的皮层区的对光栅刺激空间频率反应特性。
The optimal spatial frequency, optimal temporal frequency and integration time of the cortical neurons driven by two eyes of strabismic amblyopes were quantitatively measured.
定量比较斜视性弱视猫两眼驱动皮层细胞的最优空间频率、时间频率及其整合时间。
They use entropy and spatial frequency to evaluate the fusion result of their method and perform a comparison with the Laplacian based and the wavelet based image fusion methods.
最后利用熵和空间频率对该方法的融合性能进行了评估分析，并与基于拉普拉斯变换和小波变换的图像融合方法进行了比较。
Synthetic aperture radiometer applies the interferometric principle to sample in the spatial frequency domain and retrieves the image by Fourier or other numerical transformation.
综合孔径辐射计利用孔径综合原理在空间频率域中采样，通过傅立叶变换或其他数学变换获取反演亮温图像。
A method using the frequency divtion multiplexing technique of the laser speckle's spatial frequency to record multiple displacement information on a single specklegram is presented.
利用激光散斑空间频率的频分多路传输技术，能够在一张散斑图上记录物体多次变形的全场位移信息。
Taking into account the boundary conditions, two results were gotten: 1) The nonlinear medium provides gain to small ripples which is beyond the Bespalov-talanov cutoff spatial frequency;
而考虑边界条件以后，出现了这样两个特征：在B-T理论截止频率以外的一些小纹波依然有一定的增益；
Modulation of spatial frequency by means of multidimensional holographic modulating board can bring about transformation from object via frequency to image and implement pseudo-color coding.
通过多维全息调制板对空间频率进行调制，完成物-频-像的变换过程，可实现空间假彩色编码。
The result indicates that the ratio of the detectivities is approximately equal to the modulation transfer function of SPRITE detectors in the region of low spatial frequency, which is near 1.
在低空间频率范围内，后者和前者的探测率比近似等于SPRITE探测器的调制传递函数，接近于1。
When intensity of the atmospheric turbulence becomes stronger, or the cut off spatial frequency of the adaptive optics system becomes higher, the influence of transverse wind becomes stronger.
大气湍流的强度越大，自适应光学系统的截止频率越高，横向风的影响也越大。
When intensity of the atmospheric turbulence becomes stronger, or the cut off spatial frequency of the adaptive optics system becomes higher, the influence of transverse wind becomes stronger.
大气湍流的强度越大，自适应光学系统的截止频率越高，横向风的影响也越大。
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