Then,mouth contour is detected by local gradient operator and binarized by Ostu threshold method.
该方法首先通过Adaboost算法检测出人脸图像大致的嘴部区域,缩小了后续定位的搜索范围;采用局部梯度算子提取嘴部轮廓,通过Ostu阈值法对提取的轮廓进行二值化处理,根据链码跟踪最终确定左右嘴角的精确位置。
Detection and Localization of the Mouth Based on Local Gradient Operator
基于局部梯度算子的嘴部检测与定位
Based on gradient descent rule, the BP( Back Propagation) algorithm is a local optimization algorithm.
BP算法基于梯度下降原理，是一种局部寻优算法。
gradient and Laplacian operator
梯度和拉普拉斯算子
A Meshless Local Petrov-Galerkin Method of Functionally Graded Materials;
功能梯度材料的无网格局部Petrov-Galerkin方法
Study of The Theory of Deformation - Failur Localization For Coal;
煤体变形局部化的梯度塑性理论研究
Application of gradient shrink method in location of transformer partial discharge
梯度收缩法在局部放电定位中的应用
ENERGY NON-LOCAL MODEL AND NEW STRAIN GRADIENT THEORY
能量非局部模型和新的应变梯度理论
Local and Global Integrability of Derivatives of Solutions in Double Obstacle Problem
双障碍问题中梯度的局部和全局可积性(英文)
Rapid image registration based on local grey scale gradient characteristics
基于局部灰度梯度特征的图像快速配准方法
A New Modified Conjugate Gradient Method with a Global Convergent Property;
一种新的修正共轭梯度算法及其全局收敛性
One Improved Memory Gradient Method and its Global Convergence
一种改进的记忆梯度算法及其全局收敛性
A Finite Element Pressure Gradient Stabilization for the Compressible Navier-Stokes Equations Based on Local Projections;
可压缩Navier-Stokes方程的压力梯度局部投影有限元法
On Economical Gradient Pattern and Cooperation Strategy of Six Provinces in Central China;
中部六省经济梯度格局与合作战略研究
Asymptotically Almost Periodic Solutions of Second-order Equations with Gradient Operators
带梯度算子二阶方程的渐近概周期解
A New Small Target Tracking Method Based on the Gradient LOG Operator
用梯度LOG算子实现小目标实时跟踪
Enter the length of the ornamentation detail, from the bottom of the staircase.
输入装饰段的长度，从楼梯底部开始计算。
Policy gradient algorithm based on internal structural MPOMDP model
基于内部结构MPOMDP模型的策略梯度学习算法
Mapping Property and Its Application of Local Surjection Operator Minus Local Disturbed Operator
局部满射算子与局部扰动算子差的映射性质及其应用