Feature selection and feature extraction are common methods for dimensionality reduction.
特征选择和特征抽取是维数约简常用的两种方法。
Defect feature extraction and selection techniques were studied regarding the characteristics of X-ray detection images of carbon product.
针对炭素制品X射线检测图像的特点，对缺陷特征提取与选择技术进行了研究。
The techniques of feature extraction, feature selection and design of classifier for passive sonar target recognition are reviewed.
文章对被动声纳目标识别的特征提取、特征选择和分类器设计方面进行了回顾。
By extraction and selection of the cell shape feature, using the least distance method and shape method primarily identify and classify the lung cell.
通过形态特征的提取和选择，利用最小距离法和形态法对肺部细胞进行了初步的识别分类。
Regarding the characteristic of X-ray detection images of carbon material, flaw feature extraction and selection techniques are studied.
针对炭素制品X射线检测图像的特点，对缺陷及其特征提取与选择技术进行了研究。
In this paper we introduced the speech signal feature parameters, the speech signal feature parameters selection, and introduced short-term energy, short-term average range extraction.
本文对语音信号特征参数、语音信号特征参数的选择进行了介绍，并介绍了语音信号的短时能量、短时平均幅度的提取。
In this paper, the method for feature extraction and selection of handwriting signature is discussed. On this basis, a functional algorithm of special points extraction has been presented.
介绍了手写签名特征抽取和选择的一般方法，并在此基础上，提出了一种实用的签名笔迹特殊点提取算法。
In this paper, we propose a novel feature selection method based on concept extraction and shielded level.
本文提出了一种新的基于概念抽取和屏蔽层的特征选择方法。
The study of steganalysis mainly consists feature extraction and classifier selection and design.
隐藏检测的研究主要包括特征提取和分类器的选择与设计两个部分。
A facial expression recognition system contains face detection, face feature extraction, feature selection and expression classification.
表情识别系统包括人脸检测、人脸特征提取、特征选择以及表情分类等几部分。
This paper was a review of the methods of feature extraction and feature selection for spam image identification.
对垃圾图像判别问题中的特征提取和特征选择研究现状进行了总结。
The main contribution of this dissertation includes four aspects. They are instantaneous parameters extraction, fuzzy feature selection, single classifier design and combined classifier design.
本文主要工作体现在瞬时参数的提取、模糊特征选择、单个分类器设计和组合分类器设计这四个方面。
Secondly, the method of region feature extraction and optimal feature selection are studied based on PCA, and the effective features are constructed for the target by the analysis of the PCA.
其次，本文研究了区域形状特征提取及基于PCA的特征选择方法，通过对区域特征进行优化选择，构造准确描述目标特性且维数较低的特征。
Feature reduction method involves feature selection and feature extraction.
降维的主要方法是特征选择和特征提取。
Feature dimension reduction can be divided into two categories: feature extraction and feature selection.
特征降维可以分为两类：特征抽取和特征提取。
Feature extraction and selection are important for recognition rate in intelligent recognition using technologies of digital image processing and pattern recognition.
在使用数字图像处理和模式识别技术进行智能识别过程中，特征提取和优选成为识别率问题的关键。
The selection of features depends on the algorithm of feature extraction , and we use the 14-point ASM(Active Shape Model) in this paper.
特征的选取取决于特征提取的算法，本文采用的是14点主动形状模型。
The excellent characteristics of rotation-invariance, good orientation selection and finite redundancy are fully utilized, and applied in texture feature extraction.
充分利用双树复小波变换的旋转不变性、良好的方向选择性以及有限的冗余等优点，将其有效地应用于纹理特征提取过程中。
They are data acquisition, preprocessing, feature extraction and selection and classify and decision-making. Concludes key factors of research difficulties and give suggestions to future research.
本文就这四部分分别进行了阐述，并针对其中特征匹配判决这一环节提出了新的算法。
It is significant to study feature vector. This thesis focuses on feature extraction and feature selection.
有效的特征向量是实现字符准确识别的前提，因此具有重要的研究意义。
In this paper feature selection methods and feature extraction methods are colligated. Their advantage and disadvantage are evaluated.
本文综述了已有的特征选择和特征抽取方法，评价了它们的优缺点和适用范围。
In this paper feature selection methods and feature extraction methods are colligated. Their advantage and disadvantage are evaluated.
本文综述了已有的特征选择和特征抽取方法，评价了它们的优缺点和适用范围。
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