第二章是噪声检测基础部分。
Chapter two is about the foundational knowledge of noise detection.
传统的边缘检测方法对噪声都比较敏感。
Traditional methods for edge detection are more sensitive to noises.
本论文研究的是强噪声背景下信号流检测。
This thesis researches the signal stream detection in strong background noise environment.
该文提出了一种新的检测白噪声中微弱信号的方法。
To detect the weak signals buried in noises is a fundamental and important problem.
首先通过跟踪平稳噪声能量，检测能量变化非平稳的信号；
First, the noise energy is tracked to detect the unstable signal.
但是，噪声对自来水管道漏水定位检测的准确性带来了不小的影响。
But the noise of the water pipeline leakage detection accurate positioning has brought big impact.
对现有模板进行改进，提出一种生长模板来对差分图像中的目标点和噪声点进行检测。
A growth template that can detect the target and noise pixel was put forward.
本文提出一种噪声图象中检测边缘的新方法。
当噪声水平未知时，匹配子空间检测器属于“角度型”检测器。
当噪声水平未知时，匹配子空间检测器属于“角度型”检测器。
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