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。
A filtering method based on wavelet transform with local maximum value was discussed. The method could distinguish signal from the noise according to the different features of scale change.
小波变换局部极大值滤波方法利用信号与噪声不同的尺度变化特性来区分信号与噪声，将噪声从信号中分离出来。
Wavelet analysis reveals that the temporal scale of this change is larger than 20 years.
子波分析的结果证实这次转变的时间尺度在20年以上。
By researching on the theory of the signal sudden change token by wavelet, this paper provides the principle and algorithm of audio signal pitch extraction based on wavelet principle.
通过对小波变换表征信号突变原理的研究，给出了基于小波变换的音频信号基频提取的原理和算法。
The approximation coefficient from wavelet decomposition includes much information relating with device reliability and is more sensitive to the change of device performance.
小波分解后的概貌信息，具有更多的可靠性细节信息，对器件性能的改变更敏感。
The change of wavelet will result in the different inverse results, which will finally lead to the wrong interpretation of lithology.
子波的变化造成反演结果岩性的变化，进而造成岩性解释的错误。
Based on analysis of Wavelet Transform of ECG signal and the law of its change across different scales, this algorithm can automatically detect 6 kinds of arrhythmia.
该算法利用连续小波变换及其在不同尺度上的变化规律对心电信号进行分析，可以对常见的六种心律失常进行自动判别。
Network traffic is broken down into different frequency, and anomaly change of network traffic is detected through the high-frequency power analysis, that is the change of wavelet variance.
将网络流量分解到不同的频段，根据高频段频谱能量，即小波方差的变化对网络流量异常进行检测。
Then, the damage location can be identified by the change of the wavelet packet component energy.
通过各频段能量的变化进行损伤位置的识别。
Secondly, three single deck blast vibration signals were analyzed by wavelet packet based on software MATLAB and the change of energy distribution curve at different frequency bands was obtained.
其次，基于MATLAB时爆破振动信号进行小波包分析，得到了爆破振动信号在不同频带上的能量分布图。
Wavelet transform demonstrates that abiotic factors' impact change with spatial scale, confirming a scale-dependent relationship between NDVI and factors that influence it.
本文通过多尺度分解途径分析了NDVI与环境因子如地形与气候之间的空间尺度依存关系。
Temporal change feature is extracted from the visual image sequence using temporal decomposition based on wavelet, which reflects the dynamical content variation at a pixel at any time.
在红外图像序列中，提取了反映局部区域运动相关性的相关特征。
Temporal change feature is extracted from the visual image sequence using temporal decomposition based on wavelet, which reflects the dynamical content variation at a pixel at any time.
在红外图像序列中，提取了反映局部区域运动相关性的相关特征。
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