At the same time , gabor filter is used to extract the global feature of fingerprints from four directions and a graphic user interface is designed for this application 在指纹特征提取方面，本文基于gabor滤波器从四个方向提取指纹的全局特征，并设计了相应的图形用户界面程序。
( 4 ) approaches for texture retrieval based on high - order cumulants , multi - channel gabor filters and lifting wavelet transform are suggested separately which extract the texture features to implement the texture queries 算法对均匀纹理的分类快速有效。四、提出基于高阶累积量、多通道gabor滤波以及提升小波变换的纹理检索算法。
The second method is to extract frequency features by multiple gabor filtering . according to the second means , the usability of common invariant features is analyzed and the invariance of algebraic features is discussed 西安理工大学硕士学位论文对第二类特征，论文首先分析了各种不变特征的可用性，对代数特征的不变性进行讨论。
It is composed of ms image acquisition , image preprocessing , feature extraction and matching . iris feature extraction is based on texture analysis using multichannel gabor filtering and dubbecbies - 4 wavelet transform 虹膜图像摄取采用了自主开发研制的装置，特征提取采用gabor滤波和daubechies - 4小波变换等纹理分析方法，匹配采用方差倒数加权欧氏距离方法。
We excogitate the gabor filter based - on sub - block texture analyse to extract the feature of iris normalized image and encode them . then , we use hamming distance to match two iris codes . in order to reduce the rotation of iris , we work out a new method 4 .研究出基于子块纹理分析的gabor滤波器方法来对虹膜归一化图像进行特征提取和编码;在虹膜编码匹配中,本论文采用hamming距离来进行编码之间的匹配。
At the same time , an energy - distribution signature is calculated using gabor filters . content - based textured image retrieval system establishes color - based and shape - based retrieval . in different queries , the results will be got according to similarity measurement based on different signature 基于内容的纹理图像检索系统建立了基于图像颜色和形状的检索，根据查询的不同要求，利用不同的特征进行相似性度量，得到不同的检索结果。
We improve the clarity of the ridge and furrow structures of the fingerprint image to facilitate automatic feature extraction . first , we introduce the fingerprint image enhancement algorithm based on gabor filter . then we propose our fingerprint image enhancement algorithm based on local ridge orientation 通过增强指纹图像中脊线和谷线的清晰程度，使得指纹图像的特征提取变得更加容易，我们分析了一种“基于gabor滤波的指纹图像增强算法” ，并且提出了自己的“基于局部纹线方向的指纹图像增强算法” 。
Main works based on the newspaper samples is just as the following : ( 1 ) texture block is designed to embody more font characters . ( 2 ) filter orientation is optimized with genetic algorithm to make the angle set subtler . then the multi - channel gabor filter may extract better features 通过对实际字体样本的分析，本文主要完成了以下工作： ( 1 )设计了更能体现字体特征的纹理图像块； ( 2 )利用遗传算法对滤波角度进行了优化选择，得到了更为精细的角度集合，以此生成的多通道gabor滤波器能够提取稳定的字体特征； ( 3 )字体样本的分布具有多峰性质，以动态聚类算法得到的分段线性分类器更好地分类字体。
The second step is to devise mechanisms for extracting the facial expression information from the observed facial image . images are transformed using a multi - scale , multi - orientation set of gabor filters . since gabor vectors at neighboring pixels are highly correlated and redundant , a rectangular grid is then automatically registered with the face based on the result of face detection 在定位人脸后，下一步就是要进行脸部表情信息的自动提取，为了描述人脸的面部结构，本文采用了gabor滤波器对图像进行滤波，由于gabor矢量在相邻像素间是高度相关和信息冗余的，本文构建了一个脸部稀疏网格，抽取网格中每个节点处的一组gabor滤波结果作为脸部表情数据，从而实现脸部表情数据的自动提取。
In this dissertation , a combinatorial algorithm based on the directional segmentation is proposed for the preprocessing of the fingerprint images , this combinatorial algorithm is composed of normalization , directional image computation , directional filtering ( gabor filtering ) , local self - adaptive binarization , noise elimination and thinning 本文的预处理算法包括以下步骤:规一化、方向图计算、方向滤波(采用gabor滤波) 、局部自适应二值化、二值化去噪和细化。
