查询词典 filter

Fifth, Applying the main idea of the improved center weighted median filter to the design of the optimal stack filter based on omnidirectional structural elements constrains, the dissertation raises a kind of improved filter algorithm for de-noising of pulse noise. The theory analysis and the simulation experiment of the image processing shows that this kind of filter can not only remove noise effectively but also keep detail of the image sufficiently.

根据最优全方位结构元约束层叠滤波器中常规中值滤波带来的图像高频细节信息的丧失，引入改进的中心加权中值滤波器，从而提出改进的最优全方位结构元约束层叠滤波新方案，实验和理论证明，它相对于最优全方位结构元约束层叠滤波方案，在滤除噪声的同时更有效保持了图像的高频细节信息。

Sixth, Using the ability of the better keeping the image's detail of the morphological filter with omnidirectional multiple structuring elements and the ability of the strong removing noise of the improved center weighted median filter, this dissertation suggests a new kind of designing project of the hybrid filter for de-noising of pulse noise, which applied the idea of the stack filter based on omnidirectional structural elements constrains to the project.

利用全方位形态滤波的图像细节保持性能，中心加权中值滤波的噪声抑止能力和全方位结构元层叠滤波方案的并行处理思想，设计了一种新的脉冲噪声混合滤波新方案，它在滤除噪声的同时较好地保持了图像的细节部分，特别是其高频微小细节部分。

The new filter not only has the advantages of the incoordinate interval filter, which can solve the local filter\'s problem that the different navigation device measurements have different periods in real system ,but also has the advantages of preventing distortion of filter which caused by the imperfect arithmetic method or the incorrect statistical characteristic of noises.

对MINS/北斗/GPS多传感器信息融合算法进行了研究，提出了一种改进的非等间隔联邦滤波器，这种滤波算法除了具有非等间隔联邦滤波器的优点即可以解决各局部滤波器的量测信息的周期不同外，还具有抑制因计算方法不完善或系统噪声统计特性不确切而引起的滤波发散的功能。

Power filter is the ideal low-pass filter, but the actual power filter is usually band stop filter.

理想的电源滤波器是低通滤波器，但实际的电源滤波器通常是带阻滤波器。

Low-up-middle filter, LUM filter for short, is a kind of nonlinear filter developed on the basis of middle filter.

低-高-中滤波器(Lower-upper-middle filter，简称LUM滤波器)是中值滤波基础上发展起来的一种非线性滤波器。

The non-reference-signal's adaptive digital filter algorithm of multi-sensor data fusion in the course of adaptive filter can be done without reference signals. It can adjust convergence constant automatically, it can also be recurred with real gradient value. Thus the field to apply the adaptive filter is widened, the convergence speed of the adaptive filter is sped up, the weighted disadjustmend is decreased, so that the last error of mean square approaches its minimum value more.

这章研究的基于多传感器数据融合无参考信号的自适应数字滤波算法其在自适应滤波过程中具有不用参考信号与自动调整收敛因子及使用实际梯度值进行递推的特点，这样不仅可扩大自适应滤波的使用范围，而且还使自适应滤波的收敛速度加快有效地减小权失调，从而使最后的均方误差更接近于其最小值。

Combining vector median filter and mean value filter, vector median-mean filter, which can filter Gaussian noise and impulse noise and preserve fine details, is adopted.

为了提高图像的质量，采用了既能保持图像细节又能滤除脉冲和高斯噪声的中值滤波算法和均值滤波算法相结合的矢量中值均值滤波器。

The modified neighborhood field average filter,modified median filter and mode filter are analyzed,and a new practical method,which combines multilook average and nonlinear filter to reduce noise in the wrapped phase map,is presented.At the end of this paper,the characteristics of these approaches are compared and the experimental results by processing ERS-1/2 data are used to confirm that the method is more effective in suppressing noise in the interferogram of INSAR.

在比较条件邻域平均、模糊中值滤波和模数滤波3种非线性噪声抑制方法的基础上，提出了一种结合多视平均和非线性滤波的干涉相位图噪声抑制实现方法，并用ERS-1/2数据的实际处理结果验证了方法的有效性。

The performance of the proposed method is compared with that of the well-known vector standard filters such as the VMF, progressive switch median filter, scalar median filter ,minimum distance between central sample and scalar median in its neighborhood vector median filter and the basic vector directional filter.

结果表明，DMNVM滤波性能明显优于现有的VMF、递进开关中值滤波、标量中值滤波、与标量中值距离最小向量滤波和方向矢量中值滤波；同近年提出的自适应向量滤波比较，AVMF客观指标平均绝对误差协MAE、均方误差和标准色差分别是DMNVM的1.81、2.59和2.17倍，这说明DMNVM的滤波性能有显著提高。

The paper analyzes the change of the exit light from a circular polarizing filter used inversely according to the interference theory of polarized light, measures the spectral transmittance curves with the combining of circular polarizing filter and linar polarizing filter, and summarizes the photographic performance of the circular polarizing filter used inversely.

将圆偏振镜与线偏振镜组合，并使 1 4波片位于线偏振镜之间，测定出线偏振镜和圆偏振镜相对旋转至不同方位时的分光透过率曲线，探讨了入射光为线偏振光时出射光因偏振光的干涉而相应出现的强度和色度变化，并以此为模型，对圆偏振镜反向使用时的摄影性能进行研究和总结。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

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