spatial domain

A hologram of the watermark image is first generated by using the proposed conjugate symmetric extension and Fourier approach. The hologram is embedded into the cover image in the spatial domain.

论文将计算全息和数字水印技术相结合，在共轭对称延拓Fourier计算全息算法基础上提出了一种基于频谱分离的水印全息图空域嵌入的全息水印方法。

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Altimeter data were corrected with tidal model and was interpolated in spatial domain to obtain time series data. 3D energy-frequency-time spectrum and sea surface anomaly ( SSA) were obtained by HHT from time series data.

对南海卫星高度计资料进行潮汐校正和空间插值得到时间序列数据，对这些时间序列数据进行HHT，得到了南海海平面高度变化的三维能量-频率-时间谱和海平面高度距平（SSA）。

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Then discrete complex images method ( DCIM) is applied to obtain spatial domain Green ′ s functions, which enhance computing efficiency.

提出了二级离散复镜像法（DCIM）与表面波处理相结合的方法对空域格林函数进行计算。

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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。

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During the procedure, from PN code domain, spatial domain, temporal domain and frequency domain, the method can simultaneously suppressed the MAI, ISI and Doppler frequency interference in the channel, which greatly improved the interference suppression ability of smart antennas.

在算法处理过程中，可同时从码域、空域、时域和频域对信道中的多址干扰、符号间干扰和多普勒频率干扰进行抑制，大大提高了智能天线抗干扰性能。

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Chapter 4 analyzes the different characteristics in spatial, temporal and frequency domain of HF interference.

第四章定性地分析了天波超视距雷达HF段干扰空、时、频域的不同特点，分别采用各种不同的处理方法进行有效的抑制。

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Spatial domain models have biological plausibility; but they suffer from high computational complexity.

空间域的模型具有生物学合理性，但其计算复杂度高。

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The changes in temperature air current connection atmospheric structure field is produces the wide range layered cloud in the spatial domain ydo is the precipitation physical mechanism.

在空间域中冷暖气流交汇的大气结构场是产生大范围层状云系降水的物理机理。

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Three main spatial processes indicate multi-scale oscillations in temporal and frequency domain, in which the variations of bar movements are mainly quasi-seasonal while the berm and backshore erosions exhibit the quasi-two month period.

其中，水下砂坝运动以准季节性变化为主，滩肩和后滨地形蚀积则显示出准2个月变化周期性。

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On the basis of existing space-time block code, frequency diversity is studied and a new space-time-frequency code is further designed and applied in the OFDM system, which encodes information in spatial, temporal and frequency domain.

在现有的空时分组码的基础上，研究频率分集进一步发展设计了新的在空间、时间、频率域上三维编码的空时频码，并将其应用于OFDM系统中。

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Although the high order schemes have almost the same stability as the FDTD, the fourth order scheme with a fourth order approximation in spatial domain has a superior numerical dispersion& isotropic property of the scheme.

四阶辛算法结合四阶精度的空间差分格式较FDTD法具有更为优越的数值色散性&各向同性。

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Web-based ontology learning methods typically include terminology extraction, semantic interpretation, and create domain ontology, as well as Web-based spatial ontology learning includes those three aspects.

基于Web的本体学习方法通常包括术语抽取，语义解释，和创建领域本体。对于基于Web的空间本体学习也包括这三个方面。

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As a base operation tool disposing spatial information, GIS ( Geographic Information System) is widely used in domain of mapping, city layout, military affairs, goods circulating and so on.

地理信息系统GIS（Geographic Information system）是处理空间信息的基础平台，一直广泛应用于测绘、城市规划、军事、物流等多个领域。

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We first find the best matching unit in the spatial domain, and then select the best matching unit in temporal domain using a different matching method.

算法先在空间域通过块匹配选择最佳匹配单元，之后在时间域根据不同的匹配准则进行再次匹配，从而选取时间域的最佳匹配单元。

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A visual perception based semi-fragile watermarking scheme in image spatial domain.

提出一种基于视觉感知的图像空域半脆弱水印算法。

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A method using more than one circular harmonic components of the target pattern and encoding these components in the spatial domain is presented.

提出了一种多圆谐函数识别方法，这种方法采用了目标中的多个圆谐成分，并把这些圆谐成分在空间进行编码，产生一种多圆谐滤波器。

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Algorithm of Spatial Domain Image Watermark Based on Scrambling Transformation of Image

一种基于图像置乱变换的空域图像水印算法

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Based on this, every image frame is mapped from spatial domain to statistical domain.

然后结合图像的帧间信息将图像从空间域映射到统计域。

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With the discrete complex images method ( DCIM) and RWG basis functions, we can give a full-wave analysis of equivalence problems in the spatial domain without the Sommerfeld integrals.

首先利用等效原理将原问题转化为不同区域的等效问题，然后采用RWG基函数结合离散复镜像法在空域对等效问题进行全波分析。

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To avoid calculating the time-consuming Sommerfeld ′ s integrals, the discrete complex image method ( DCIM) is employed to obtain spatial domain closed-form Green's function for planar-layered media.

使用离散复镜像方法（DCIM）快速得到平面分层介质的空间域的闭式格林函数，避免了费时的索末菲尔德积分。

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Discrete fourier transform ( DFT) was introduced into the spatial domain signal processing to analyse and process the uniformly spaced linear array signals, and a method to extract the DOA of signal was presented.

将离散傅里叶变换（DFT）引入到空域信号处理中，对等距线阵接收的信号进行了分析和处理，提出了一种提取信号来波方向的方法。

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Based on the Stokes formula and the spatial domain truncation approximation method, the analytic relationship was deduced between free-air gravity anomalies grid on geoid used in the inner area, global geopotential model in the outer area and precision of regional gravimetric geoid.

根据Stokes积分和空域截断逼近模式，推导了内区格网空间重力异常（大地水准面上）、外区全球重力场模型与大地水准面计算精度的解析关系。

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In the spatial domain, the second-order statistics of a gray level co-occurrence matrix are used as the features. In the frequency domain, Gabor filters are used for image filtering, and then textural features are extracted.

空域上，采用了灰度共生矩阵的二阶统计量作为特征：频域上，采用了Gabor滤波器对图像进行滤波，进而提取特征。

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