查询词典 segmentation

It solves the problem that the unitary contour presentation can not correctly extract face contour in a face image which suffers from scale, rotation etc. The definition of the internal and external energy function is provided. At the same time, the global matching algorithm and local matching algorithm is given. The experiment shows that this presentation and the accompanying matching algorithm can be used to extract the face contour very well. So the image segmentation can be implemented by using it.②By analyzing the recognition principle of PCA method, we can conclude that the face images coming from different surrounding consist of different face image space. This is the essential reason that makes the generality of PCA method worse. Also, we give a measurement means to measure the distance from different face image space, so we can analyze face image space more conveniently.③We also construct various scale models and rotation pose models to detect the scale and rotating angle of face image to be recognized. The experiment results show that the detecting precision is very high. So it is good for face image feature extraction and face image representation.④Similarly, we construct local feature models of face image and utilize them to detect the local feature of face image. At the same time, we put forward a novel face image local feature detection algorithm, locating step by step. The experiment results show that this method can accurately detect the location of local face feature in a image.⑤A novel face image presentation model, dual attribute graph , is put forward. Firstly, it utilizes attribute graph to present the face image, then exact the local principal component coefficient and Gabor transform coefficient of thc pixels which corresponds to the nodes of the graph as the attribute of the nodes. This representation fully makes use of the statistical characteristic of the local face feature and utilizes Gabor transform to present the topographical structure of face image. So DAG has more general property.⑥Based on the DAG presentation, we give a DAG matching function and matching algorithm. During the design of the function and algorithm, the noise factor, e. g., lighting, scale and rotation pose are considered and tried to be eliminated. So the algorithm can give more general property.⑦A general face image recognition system is implemented. The experiment show the system can get better recognition performance under the noise surrounding of lighting, scale and rotation pose.

本文在上述研究的基础上，取得了如下主要研究成果：①构造了一个通用的人脸轮廓模型表示，解决了由于人脸图象尺度、旋转等因素而使得仅用单一轮廓表示无法正确提取人脸轮廓的问题，并给出了模型内、外能函数的定义，同时给出了模型的全局与局部匹配算法，实验表明，使用这种表示形式以及匹配算法，能够较好地提取人脸图象的轮廓，可实际用于人脸图象的分割；②深入分析了PCA方法的识别机制，得出不同成象条件下的人脸图象构成不同的人脸图象空间的结论，同时指出这也是造成PCA方法通用性较差的本质原因，并给出了不同人脸空间距离的一种度量方法，使用该度量方法能够直观地对人脸图象空间进行分析；③构造了各种尺度模板、旋转姿势模板以用于探测待识人脸图象的尺度、旋转角度，实验结果表明，探测精确度很高，从而有利于人脸图象特征提取，以及图象的有效表示；④构造了人脸图象的各局部特征模板，用于人脸图象局部特征的探测；同时提出了一种新的人脸图象局部特征探测法---逐步求精定位法，实验结果表明，使用这种方法能够精确地得到人脸图象各局部特征的位置；⑤提出了一种新的人脸图象表示法---双属性图表示法；利用属性图来表示人脸图象，并提取图节点对应图象位置的局部主成分特征系数以及Gabor变换系数作为图节点的属性，这种表示方法充分利用了人脸图象的局部特征的统计特性，并且使用Gabor变换来反映人脸图象的拓扑结构，从而使得双属性图表示法具有较强的通用性；⑥在双属性图表示的基础上，给出双属性图匹配函数及匹配算法，在函数及算法设计过程中，考虑并解决了光照、尺度、旋转姿势变化等因素对人脸图象识别的影响，使得匹配算法具有较强的通用性；⑦设计并实现了一个通用的人脸图象识别系统，实验结果表明，该系统在图象光照、尺度、旋转姿势情况下，得到了较好的识别效果。

In view of the existing algorithm that is unable to take better account of the network connectivity and the attributes of individual nodes comprehensively, the limitation of the typical algorithms of agglomerative and divisive clustering was analyzed, thus defining conceptually the edge loading, edge weight, connectivity threshold and graph segmentation.

由于当前的算法不能很好地将网络的联通性和单个节点的属性综合考虑，分析了凝聚和分裂层次聚类经典算法的局限性，从而给出边的载荷、边的权重、连接度门限、图形分割等定义。

Through the segmentation of the spatial box bounded by point cloud, efficient extraction of boundary information is implemented.

通过对点云数据进行空间三维划分，实现了边界信息的高效提取。

On the basis of introduction of the elementary principles and features of Particle Swarm Optimizational- gorithm,a new multi-thresholds segmentation method based on PSO is proposed.

在对粒子群优化算法的基本原理和方法进行简要概述的基础上，提出了一种基于粒子群的多阈值图像分割算法。

At first emendate the license plate, then utilize the quality of character, such as width of character and space between character, to segment the character. The method is simple and applied, and the result of segmentation is good.

先对车牌进行校正，再利用车牌字符的先验知识，根据字符的宽度和间距等进行字符的分割，实验表明这种方法简单、实用，获得较好的分割结果。

This paper presents a method for segmentation of the endocardium and epicardium of the left ventricle in cardiac magnetic resonance images using Snake models.

提出一种基于Snake模型的左室壁内、外膜分割方法。

Considering that the left ventricle is roughly a circle, a shape constraint based on circle is adopted for segmentation of the endocardium.

就左室壁内膜的分割而言，考虑到左室壁的形状近似为圆形，引入基于圆形约束的能量项。

His ideas on immediate constituent analysis, segmentation by contrast, included position and absolute position, bound form and free form, the minimum free form, endocentric...

他提出的新概念有：内部位置和绝对位置，粘附形式和自由形式，最小自由形式，向心结构和离心结构，完整句和小型句，零成分，短语词等，对后世的语法研究有深远影响。

This paper discusses the key technology of the auto-answering system such as the construction of the initial knowledge base, word entry segmentation of Chinese ideograph and the full-tex search technology of web page.

该文对自动答疑系统的关键技术：初始领域知识库的构建、汉语词条切分技术、web页面的全文搜索技术进行了论述。

As the distance between epiphysis and metaphysis is relatively close, it can prevent the contour from closing toward the edge of epiphyseal structure which has been divided in the first step, to set a perpendicular to the x-axis of region of interest in the segmentation process.

由于骨骺和干骺相离较近，在分割过程中设定一个垂直于兴趣区域x轴的直线，防止轮廓向着第一步中已经分割好的干骺骨结构边缘靠近。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。