If the pixel is a local maximum or minimum, it is selected as a candidate keypoint.
如果像素是局部的最大值或者最小值，则会被作为备选的特征值。
A stationary point which is neither a local maximum nor a local minimum point is called a saddle point.
一个既不是局部极大点又不是局部极小点的平稳点称为一个鞍点。
The result of maximum energy method depends on the initial values of residual statics. The solution is often trapped into the local minimum of the objective function.
最大能量法的结果受初始静校正量的影响，它的解容易陷入目标函数的局部极小值。
First, nonlinear stack filter is applied to estimate the maximum and minimum of noise-free image's gray scale value in a local region.
首先非线性堆滤波器用于求出图象某象素点邻域内的灰度最大值与最小值的最优估计，然后以此两估计值之差代替原象素点灰度值。
With the features of a function's derivatives at a point, this paper discussed some problems of the function, such as monotonicity, local maximum, local minimum, inflection point, and asymptote.
本文利用函数某处的各阶导数的特点，以确定函数在该处的单调、极大值、极小值、拐点及浙近线等。
The local maximum and minimum in reflectance spectral curve, corresponding to reflectance apex and Absorption apex, can be used to retrieval also, but effective matching strategy should be adopted.
基于光谱特征的检索可以通过提取反射和吸收光谱、光谱特征匹配的方法进行；
The local maximum and minimum in reflectance spectral curve, corresponding to reflectance apex and Absorption apex, can be used to retrieval also, but effective matching strategy should be adopted.
基于光谱特征的检索可以通过提取反射和吸收光谱、光谱特征匹配的方法进行；
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