Based on the constructive theory of orthogonal binary wavelet transform, a parameter expression equation of binary wavelet and adaptive goal function put forward.
基于二进正交小波构造原理,构造了正交小波基参数表达方程及降噪效果的自适应目标函数,应用遗传优化方法求出最佳小波基。
It can be applied in studying the property of any basic wavelet and learning the theory on the wavelet transform, and also in making some engineering signal analysis.
它即可用于对母小波的研究和对小波理论的学习,也可用于一些工程信号分析。
A novel method of fingerprint identification based on the features extracted from the integrated discrete wavelet and the Fourier-Mellin transform (DWFMT) was proposed.
为提高指纹鉴别率,提出了一种基于DWFMT变换提取特征进行指纹鉴别的新方法。
In view of the welding image feature of strong noise and poor stability, a fuzzy detection algorithm of welding image based on wavelet and morphology denoising was presented.
针对焊接图像噪声大、稳定性差的特点,提出了一种基于小波降噪和形态学模糊检测的算法。
The results show that the main amplitude, main frequency and frequency band of reflected wavelet and the effective dynamic range of system have different degrees of increase.
结果表明,改进后仪器接收到的地震反射波主振幅、主频率、频带宽度、垂向分辨率及仪器记录信号的有效动态范围均有不同程度的提高。
In order to remove this phenomenon, we consider the cycle spinning method based on threshold wavelet and then use the coefficient magnify to remove the signal noise.
为了去除这种现象,考虑在阈值法的基础上对信号进行循环平移,然后再对平移后阈值上的系数进行放大,对信号进行消噪处理。
In allusion to the characteristic that Geocentric motion is piled up by several periodic motions, the spectral analysis by wavelet and ar were discussed in turn in this paper.
针对地球质心运动主要是由多种周期运动叠加的特点,依次讨论了谱分析方法中的AR模型谱分析和小波谱分析方法。
Secondly, a new method of infrared weak and small targets detection based on wavelet and adaptive threshold is proposed with an effective improvement detection of performance.
其次,利用小波多分辨分析特性,提出了基于小波分析的自适应门限检测方法,有效地提高了红外弱小目标检测性能。
Filtering algorithms base on space, frequency, wavelet and time have been introduced to reduce noises caused by environmental and lighting conditions in the video image sequences.
针对视频图像存在由于环境、光照等原因所引起的噪声的特点,应用基于空间域、频域、小波域和时域等多种去噪方法。
In respect of wavelet processing, we applied the technology of surface consistent deconvolution to compress the wavelet and consistent correction, which improved the data resolution.
在子波处理方面,利用地表一致性反褶积技术进行子波压缩和一致性校正,提高了资料的分辨率。
The paper introduces the definition of wavelet transform and its properties. Especially the philosophy for zero-crossing wavelet and how it can be used in seismic prospecting are presented.
介绍了小波变换的定义及小波变换的性质,特别介绍了零通小波的理论及其如何在地震勘探资料处理中的应用。
To extract early fatigue feature of engine bearings, the paper presents an average spectrum method with double-wavelet and the diagnosis examples are used to show the validity of the method.
为了提取机车滚动轴承早期损伤类故障特征,本文提出了一种双重小波平均谱方法,并通过诊断实例验证了方法的有效性。
The modeling formula based on seismic wavelet can well simulate zero-ph ase wavelet and hybrid-phase wavelet, and also approximate maximal-phase and minimal-phase wavelet in a certain sense.
基于地震子波的模拟公式,可以很好地模拟零相位和混合相位子波,在一定意义上也可以近似模拟最大相位及最小相位子波。
This paper introduces the theory about wavelet and the applications on image processing particularly and gives two image merging ideas and gives two different boundary reconstruction methods.
本文详细介绍了小波变换理论及其在图像处理方面的应用,分别提出了几何角度和灰度角度的两种不同的图像镶嵌算法,并提出两种不同的边界重构方式。
The main parameters that effect horizontal resolution of migration imaging were identified as medium velocity, dominant frequency of seismic wavelet and aperture Angle of migration processing.
结果表明,影响偏移成像水平分辨率的主要参数是介质速度、地震子波主频和偏移处理的孔径角。
After wavelet analysis extracts feature vectors, the paper constructs corresponding neural network for fault identification, and designs the combination of wavelet and neural network approach.
本文针对小波分析之后提取的特征向量,构建了与之相适应的神经网络进行故障识别,并对小波和神经网络的结合方式进行了设计。
Starting from perfect reconstruction filter Banks, the relationship between the wavelet and the filter Banks is analyzed, and the construction of complex discrete orthonormal wavelet is discussed.
从完全重构滤波器组出发,分析了小波与滤波器组之间的关系,讨论了复数离散正交小波的构造。
Among the methods for estimating the minimum phase wavelet from its amplitude spectrum, methods of Hilbert-transform, of homomorphy, of zero-phase wavelet and of relaxation-iteration are analysed.
根据子波振幅谱估算最小相位子波已有多种方法,本文对用希尔伯特变换法、同态法、零相位子波法、松弛迭代法等估算的最小相位子波,进行了详细的分析。
Using the different time-frequency characteristics of wavelet and wavelet packet, the proposed approach can avoid the noise and complete the detection and classification of transient power quality.
该方法利用小波和小波包各自的时频分解特点,实现了暂态电能质量扰动的自动检测和分类。
Here we used Wavelet and spectral analysis to different kind seismic waves in volcanic area, in order to pick up their spectral character and determine the type of these earthquakes.
本文对火山区不同种类的地震波形运用小波分析和频谱分析的方法,希望能提取不同类型火山地震的一些频谱特征,确定火山地震的类型。
Wavelet and Fourier analyses are widely used in various fields of image processing. They can be utilized in land use remote sensing dynamic monitoring to detect change information automatically.
小波分析和傅立叶分析被广泛地应用于图像处理的各个领域,它们也能被应用于遥感影像土地利用变化检测。
In this paper, we first discuss the periodization of spline orthogonal wavelet, and then give the decomposition and reconstruction algorithms of the periodized wavelet.
本文对正交样条小波进行周化,给出了周期正交样条小波的分解与重构算法。
We use ARMA model to describe the seismic wavelet, and use genetic algorithms to estimate the ar parameters and the ma parameters iteratively.
该方法用ARMA模型描述地震子波,用遗传算法交替迭代地估计AR和MA参数。
In the dissertation, author discusses the relations of fractal with chaos and of fractal with wavelet, and introduces briefly the application of fractal in digital image watermarking techniques.
论文讨论了分形与混沌、分形与小波之间的关系,简要介绍了分形在数字图像水印技术中的应用。
The time domain field distribution on the surface of Huygens' box was decomposed using wavelet, and the quantified coefficient of the wavelet decomposition was saved.
利用小波分解对惠更斯表面的时域切向场分布进行分解,存储经过阈值量化后的小波系数达到压缩编码的目的。
Three typical stress waves induced by impact loads were analyzed by both Fast Fourier Transform (FFT) and Wavelet, and the distribution rules of frequency and energy of stress waves were obtained.
对三种典型应力波分别利用傅立叶变换与小波变换进行了对比分析,得知了它们的频率分布以及能量分布规律;
It is an effective method to reduce the noise in signal by wavelet, and proper parameters are selected to reduce the noise in test signal of BJ2020S road-off jeep in this paper.
利用小波良好的去噪性能,选择了合适的参数对越野吉普车BJ2020S实验测量信号进行小波去噪。
It is an effective method to reduce the noise in signal by wavelet, and proper parameters are selected to reduce the noise in test signal of BJ2020S road-off jeep in this paper.
利用小波良好的去噪性能,选择了合适的参数对越野吉普车BJ2020S实验测量信号进行小波去噪。
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