Taking a SEM image of the machined surface as an example, its edge can be extracted by using the local maximum of wavelet s coefficients, and thus the characteristics of a machined surface can be achieved.
图像边缘是图像的重要特征 ,提出了一种基于小波变换的图像多尺度边缘检测算法 ,并以机加工表面SEM图像为对象 ,利用小波系数局部极大值提取其边缘 ,实现机加工表面纹理特征提取。
The sharp variation of gray levels of an image, measured at different scales, can be detected from the local maxima of its wavelet transform.
在不同尺度下图像突变点可以通过它的小波变换局部极大值来检测。
By handling the wavelet transform coefficient modulus in the domain of wavelet transform, and determining the local maxima of the wavelet transform coefficient modulus, it provides information of the image boundaries features.
基于信号与噪声在不同尺度下小波变换系数模不同的变化特征，提出了一种边缘检测方法，该方法通过对图像的小波变换域中由噪声引起的小波变换系数模进行处理，再利用小波变换系数模局部极大值来提取图像的边缘特征，实验结果说明这种特征提取方法可以有效地降低噪声，同时又较准确地提取出图像的边缘。
A quadratic lubricity wavelet as wavelet function was defined to do the two dimensional dyadic wavelet transform on fruit infrared image,and to get local modulus maxima from the results.
以二次光滑小波作为小波函数,对水果红外图像进行二维二进小波变换,计算了小波变换结果的局部模极大值点,从而得到了水果红外图像的轮廓。
In this paper,a method to detect image edges based on local modulus maxima of wavelet is proposed.
提出了一种基于小波变换局部模极大值的边缘检测方法。
A multi_scale method to detect image edges based on local modulus maxima of stationary wavelet transform was proposed for blurred image, low contrast image and Gauss noise_added image.
利用平稳小波变换的多尺度边缘检测算法分别对模糊图像、低对比度图像和加入噪声的图像进行了边缘检测,验证了多尺度二次B样条小波的检测效果,也比较了三种小波局部模极大值方法在抗噪性、计算量及检测效果等方面的性能,并且针对对比度低,受噪声污染严重的目标图像,提出一种能够根据不同背景计算出自适应阈值的新方法,使其在抗噪的同时又能较好地提取出微弱目标边缘。
The targets are separated off from searching for local maximum, determining threshold and combining with the correlation of image frames.
搜索局部极大值,确定阈值并结合图像帧间的相关性分离出目标。
Therefore, an algorithm of PD signal reconstruction based on modulus maximum wavelet domain is presented in this paper.
为此,该文提出一种基于模极大值小波域的局部放电信号重构算法。
Local and Global Almost Sure Central Limit Theorems on Extremes;
极值的局部及整体几乎处处中心极限定理
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。
A remark of locally symmetric extremal Hermitian metric
关于局部对称极值度量的一个注记(英文)
AN EXTREME MINIMUM FIXED POINT THEOREM FOR SET-VALUED MAPPING IN THE LOCAL CONVEX SPACE
局部凸空间中集值映射的一个极小不动点定理
A maximum or minimum value of a function.
极大值，极小值函数的最大值或最小值
Local Pressure to Enlarge the Photography of the Value of Breast Disease;
局部加压放大摄影对乳腺疾病诊断的价值
Local Search Algorithm for Solving Maximizing Submodular Set Function;
求解下模集函数最大值问题的局部搜索算法
By translating a geometric constraint problem into an optimization problem, the global optimum of a multi-variation function was sought for and the local traps were ignored by using chaos method in the algorithm.
将约束求解问题转化为优化问题,并对多变量函数求全局极值,用混沌算法跳过局部搜索陷阱.
Maximum Loading, Velocity, and PV Values for select kit materials.
所选部件材料的最大载荷、度和极限PV值。
The Decision on the Minimal Covering of Precomplete Classes in Partial Multiple-valued Logic;
部分多值逻辑中极大封闭集之最小覆盖的判定
minimax regret critical value
极小极大后悔临界值
a sudden local flood of great volume and short duration.
一个突然的有极大流量和较短持续时间的局部洪水。
Boundedness of Spherical Local Maximal Operator for Radial Functions in the Plane;
球面局部极大算子在二维向径函数空间上的有界性
Research on Local Lagrangian Numerical Differentiation;
局部Lagrange数值微分法研究
Plane 2D Numerical Simulation on Flow Field and the Max Equilibrium Scour at Abutments;
桥台局部流场及最大平衡冲刷的平面二维数值模拟
Asymptotic Distribution of Maxima and Point Process of Locally Stationary Gaussian Process;
局部平稳高斯过程的最大值与点过程的渐近分布