通过图像块与相似块在DCT变换域少数低频系数的比较，来确定匹配的相似块。
This method compares the few low frequency DCT transform coefficients of the range blocks and domain blocks to find out the matched domain block.
该算法结合图像的四叉树分解原理，利用图像小波域低频系数的特征来构造零水印。
The algorithm combines the quadtree decomposition of image, with making use of the characteristic of the lowest frequency coefficients in DWT domain to construct non-watermark.
根据局部梯度信息对源图像的小波低频系数进行选择，获取融合图像的对应低频系数。
According to local gradient information, wavelet low frequency coefficient obtained from source image is selected to compose respective low frequency coefficient of the fused image.
同时算法与视频压缩算法相结合，在DCT域的次低频系数中嵌入信息，提高其鲁棒性。
At the same time, the algorithm is combined with the video compressing standards, and embeds the information in the coefficient of the sub-low frequency in DCT domain, which improves the robustness.
根据音频段的分类效果，不同强度的水印分量被嵌入到不同音频段中的部分DCT低频系数中。
Components of watermarking with different strength are embedded into the parts of low frequency DCT parameters in different audio segment according to the...
根据音频段的分类效果，不同强度的水印分量被嵌入到不同音频段中的部分DCT低频系数中。
Components of watermarking with different strength are embedded into the parts of low frequency DCT parameters in different audio segment according to the classification results. T...
文中提出一种基于听觉掩蔽效应的音频数字水印算法，根据掩蔽阈值在DCT低频系数中嵌入水印。
Watermarking embedding algorithm based on auditory masking is proposed in this paper, which embeds watermarking based on masking threshold in low-band coefficients of DCT transformation.
颜色特征采用整数小波低频系数矩阵中环形区域的F -范数，纹理特征则采用高频部分的能量比值。
The circular region F-norms in low frequency band of wavelet transform is used as color feature of the image and the energy ratio of high frequency band is used to form texture descriptor.
同步信号嵌入时域，以提高搜索效率，水印隐藏在离散小波变换域的低频系数中，以达到较好的鲁棒性。
Search efficiency is improved by embedding synchronous signals into time domain. Better robustness is achieved by hiding the watermarking into the low frequency coefficient of DWT domain.
首先将原始图像进行分块，逐一对每块子图进行整数小波分解，然后将置乱后的二值图像嵌入到低频系数。
First of all, original image is divided into blocks, each subgraph for integer wavelet decomposition, and then the binary image after scrambling embedding.
该融合策略首先在区域能量的基础上引入区域梯度，然后根据匹配度的类型和测量值进行小波低频系数的选取。
It is performed by introducing the local gradient into local energy and then selecting the low frequency coefficients according to the type and the vale of match measures.
提出了一种基于小波分解和倒谱技术的音频数字水印算法，该算法通过对原始音频进行小波多级分解，从中选取低频系数进行倒谱变换。
Based on wavelet decomposition and cepstrum technology, an audio watermarking algorithm was proposed in which the low-frequency wavelet coefficients were chosen for cepstrum transforming.
结果表明材料的平均吸声系数和降噪系数分别达0。58和0。60，且材料的中低频吸声性能优良。
The result shows that average absorption coefficient and noise reduction coefficient separately equal to0.58and0.60 and fine property of sound absorption at middle-low frequency.
采用全面最小二乘法识别扬声器系统的时域函数的全套系数，从而测出扬声器系统的低频特性参数。
It adopts the total least square method (TLS) to identify the complete coefficient set of the loudspeaker in time domain, thus measures low frequency characteristic of loudspeaker.
低频重要系数采用无失真编码压缩。
The low frequency important coefficients were coded by undistorted compression.
最后，应用复系数转矩分析法研究了可控串联补偿实现抑制低频振荡的机理。
At last, the reason of why the TCSC can restrain the LFO is given by use of the plural coefficient torque method.
随着孔隙率、孔径的减小，多孔铝的共振吸声系数有所下降，吸声频谱曲线向低频方向移动，且频带宽度展宽。
When the porosity and pore diameter reduced, the sound absorption curve moved to the low frequency zone and the frequency bandwidth increased at the same time.
矿井提升绞车在计算低频制动电压时，通常采用低频最大力矩是平均力矩1.25倍的折算系数。
We usually take the coefficient 1.25 times the average torque as the low frequency maximum torque to calculate the low frequency braking voltage.
饱和砂岩中扎隙液体的粘滞系数对饱和砂岩的衰减、模量和速度色散的影响在较低频段是明显的。
The viscosity coefficient of pore fluid in saturated sandstone has an obvious effect on the attenuation, modulus, and velocity dispersion in low frequency range.
纵波的衰减系数在地震频带内基本上呈线性变化，而横波的衰减系数在地震频带内除低频外基本保持稳定。
The attenuation factor of longitudinal wave was changing linearly, whereas the attenuation factor of the slow shear wave kept nearly constant with a low frequency on the exploration seismic band.
经测试表明，依照该方法可以设计实现噪声系数极小的超低频放大器，且性能稳定可靠，符合设计指标要求。
The experiment shows that using this method we can realize a SLF low noise amplifier with stable performances and meeting design requirements.
对两幅图像低频波段的逼近系数取均值，对高频段选取绝对值大的小波包系数，得到融合系数矩阵。
Approximate coefficients in low frequency band of two images and the average over absolute wavelet packet coefficients of high frequency brand form a fused coefficients matrix.
利用PVC、NBR、无机物等制成了一种吸声材料，该吸声材料具有低频吸声系数高、成型加工简单、成本低等优点。
The new sound-absorbing material made from PVC, NBR and other inorganic compounds was studied. This material has good sound-absorbing properties in the low frequency.
最后，对低频和高频系数，分别提出了相应的差错检测和掩盖算法。
Finally, error detection and concealment algorithms for low and high frequency coefficients are presented respectively.
饱和砂岩中扎隙液体的粘滞系数对饱和砂岩的衰减、模量和速度色散的影响在较低频段是明显的。
The viscosity coefficient of pore fluid in saturated sandstone has an obvious effect on theattenuation, modulus, and velocity dispersion in low frequency range.
仿真结果表明：带有空腔的尖劈吸声器相对普通尖劈吸声器，除保持高频段较好吸收性能外，在低频段吸声系数有显著提高；
The results showed that the absorption performance of this kind of absorber is better than normal wedge absorbers in low frequency and it keeps good absorbing performance in high frequency.
仿真结果表明：带有空腔的尖劈吸声器相对普通尖劈吸声器，除保持高频段较好吸收性能外，在低频段吸声系数有显著提高；
The results showed that the absorption performance of this kind of absorber is better than normal wedge absorbers in low frequency and it keeps good absorbing performance in high frequency.
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