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1.
基于Hausdorff距离的手势识别   总被引:20,自引:1,他引:20       下载免费PDF全文
随着先进人机交互技术的提出及发展,手势识别正成为其中一项关键技术,基于视觉的手势识别是当前涉及图象处理,模式识别,计算机视觉等领域的一个比较活跃的课题,由于Hausdorff距离模板匹配的方法具有计算量小,适应性强的特点,因此基于Hausdorff距离,建立了一个手势识别系统,该系统采用边缘特征像素点作为识别特征,并首次利用Hausdorff距离模板匹配的思想,在距离变换空间内,实现了中国手指字母集上的基于单目视觉的30个手指字母的手势识别,为提高系统的鲁棒性,还提出了修正的Hausdorff距离形式,测试集上的平均识别率为96.7%,实验结果表明,基于Hausdorff距离的模板匹配方法用于基于听觉的静态手势识别是可行的。  相似文献   

2.
为了快速准确地进行车型识别,提出了一种基于SUSAN角点检测的识别方法。通过计算待识别车辆与三种标准样本SUSAN角点的Hausdorff距离,将Hausdorff距离较小的两者认定具有相同的车型,实验结果表明,该方法准确、有效且实时性较好。  相似文献   

3.
针对已有静脉识别方法存在的识别结果易受图像质量影响、计算量大的问题,提出一种使用改进的方向滤波与修正的Hausdorff距离技术的指静脉识别方法.根据指静脉图像具有的方向特性设计邻域方向模板及方向滤波器模板对图像进行滤波增强处理后,利用修正的Hausdorff距离模板匹配的思想,在距离变换空间内实现指静脉图像的匹配识别.实验结果表明,该方法对指静脉图像的匹配识别具有较好的准确率.  相似文献   

4.
图像匹配的鲁棒型Hausdorff方法   总被引:12,自引:1,他引:12  
提出基于一种新型Hausdorff距离的鲁棒型图像匹配方法,首先对传统的各种Hausdorff距离所存在的缺陷进行了分析,然后根据这些缺陷提出了“鲁棒型”的Hausdorff距离,这一新的距离考虑了边缘点的位置,边缘点的总数,由有限点组成的伪边缘,出格点和边缘的遮挡等因素,从而使传统的缺陷得到了克服,对合成图像及实际图像的实验结果表,暖气 提出的Hausdorff距离测度比传统的Hausdorff距离测度更为有效。  相似文献   

5.
房爱东  胡学钢  盛庄 《计算机工程》2012,38(24):156-160
针对纸币序列号识别问题,提出一种快速识别方法。求解字符连通域特征和扫描线法对序列号实现粗分类,使用Hausdorff距离和闭合曲线特征对字符进行细分类,对细分类的字符利用字符区分器进行识别。实验结果表明,该方法操作简单,能避免复杂的计算,识别速度较快,且能提高字符的识别率。  相似文献   

6.
提出了一种新的车牌字符识别算法.该方法先对车牌中的单个字符进行预处理,然后采用Hausdorff距离模板匹配方法识别,对于特定位置的特殊字符,再进行校正识别.实验表明,该方法有效可行。  相似文献   

7.
基于视觉技术的手势跟踪与动作识别算法   总被引:1,自引:0,他引:1  
对工业生产线上规程化操作动作进行手势跟踪与动作识别研究。首先选取YCbCr颜色模型进行手部区域识别,获得完整手部区域;然后利用Euclidean距离变换计算相邻2个手部运动轨迹点之间的距离和各帧图像的手部运动速度;再利用扩展有限状态机模型实现手部运动的分割,将分割的多个动作与建立的动作模板匹配,利用Hausdorff距离匹配法判断匹配结果的准确性,实现手部动作的识别。实验结果表明:该手部动作识别算法对背景干扰和摄像头轻微震动具有一定的抗噪能力,有较高的动作识别正确率,能够满足现实工作环境下的应用需求。  相似文献   

8.
基于图像匹配技术的飞机识别   总被引:10,自引:0,他引:10  
从图像匹配原理着手,采用了3种模板匹配方法:基于德耳塔相关度量,基于改进Hausdorff距离算法和基于序贯相似性检测算法,对机场飞机进行匹配和识别。实验结果证明了这3种方法的有效性。  相似文献   

9.
韦学辉  陈刚  陈北京 《软件学报》2004,15(Z1):164-168
在图像放大处理中通常要将图像进行插值,在Hausdorff测度理论的基础上对Hausdorff距离进行了改进.然后将改进后的Haosdorff距离作为评价图像质量的一种标准,对放大后的图像进行量化评估,并与其他的评价方法进行比较.结果表明用Hausdorff距离作为评价标准得到的结果更接近图像的视觉效果.  相似文献   

10.
基于外耳轮廓边缘信息的人耳识别   总被引:1,自引:0,他引:1  
提出一种用Hausdorff距离表示入耳边缘特征的人耳识别方法.首先对原始人耳图像进行预处理,用基于灰度形态学梯度和局部阈值分割的边缘检测方法提取外耳轮廓边缘;然后用标准方差和边缘线段间长度差改进的Hausdorff距离表示人耳特征向量;最后采用支持向量机算法完成人耳识别.实验结果证明,该方法能获得更高的人耳识别率.  相似文献   

11.
This paper deals with the difficult problem of indexing ancient graphic images. It tackles the particular case of indexing drop caps (also called Lettrines) and specifically, considers the problem of letter extraction from this complex graphic images. Based on an analysis of the features of the images to be indexed, an original strategy is proposed. This approach relies on filtering the relevant information, on the basis of Meyer decomposition. Then, in order to accommodate the variability of representation of the information, a Zipf’s law modeling enables detection of the regions belonging to the letter, what allows it to be segmented. The overall process is evaluated using a relevant set of images, which shows the relevance of the approach.  相似文献   

12.
在Windows之下的WORD或其它文本编辑软件中进行文稿编辑时,经常遇到插入图形图象的问题,甚至在电子邮件Email中编辑发送函件也同样有这种可能。介绍文档及电子邮件中图形图片的编辑、插入等处理方法,简单实用。  相似文献   

13.
This letter describes algorithms for global thresholding of grey-tone images which use second-order grey level statistics. Two measures of interaction between classes of intensity levels are defined on simple co-occurance matrices and are used to evaluate and select thresholds. One of these measures is seen to be independent of the grey level histogram and effective in selecting thresholds for images with unimodal grey level distributions. The algorithms are also used for multithresholding without modifications.  相似文献   

14.
In this letter, we propose a robust, linear in time modification of Aktouf, Bertrand and Perroton’s algorithm for tunnel (3D hole) closing in 3D volumetric objects. Our algorithm is insensitive to small distortions and branches. The algorithm has been tested on various 3D images including very complicated 3D crack propagation images. The results of the tests, discussion of the algorithm properties and future research plans are also included in the paper.  相似文献   

15.
Even though a lot of researches have been conducted in order to solve the problem of unconstrained handwriting recognition, an effective solution is still a serious challenge. In this article, we address two Arabic handwriting recognition-related issues. Firstly, we present IESK-arDB, a new multi-propose off-line Arabic handwritten database. It is publicly available and contains more than 4,000 word images, each equipped with binary version, thinned version as well as a ground truth information stored in separate XML file. Additionally, it contains around 6,000 character images segmented from the database. A letter frequency analysis showed that the database exhibits letter frequencies similar to that of large corpora of digital text, which proof the database usefulness. Secondly, we proposed a multi-phase segmentation approach that starts by detecting and resolving sub-word overlaps, then hypothesizing a large number of segmentation points that are later reduced by a set of heuristic rules. The proposed approach has been successfully tested on IESK-arDB. The results were very promising, indicating the efficiency of the suggested approach.  相似文献   

16.
Acquiring land cover types from very high resolution (VHR) images is of great significance to many applications and has been intensively studied for many years. The difficulties in image classification and the high frequencies of remote sensing image acquisition make it urgent to develop efficient knowledge transfer approaches for understanding multi-temporal VHR images. This letter proposed a knowledge transfer approach that uses the label information of the existing VHR images to classify multi-temporal images. The approach was implemented in three steps: object-based change detection, knowledge transfer of label information, and random walker (RW) classification. The proposed approach was tested by two datasets with each having two temporal images acquired on the same geographical areas. The experimental results showed that the proposed approach outperformed the support vector machine (SVM) algorithm in classifying multi-temporal images and can reduce the influence of spectral confusions on image classification.  相似文献   

17.
杨全  王民 《微计算机信息》2007,23(25):265-266,191
提出了一种在距离空间内采用Euclidean距离计算的手势识别算法。手势图像经过边缘检测后,对边缘图像实施Eu-clidean距离变换(EDT),在距离变换空间内计算距离映射图与样本之间的Euclidean距离。最后,对基于单目视觉的30个手指语字母手势进行识别,最好识别率达93.33%。  相似文献   

18.
在当今Internet时代,电子邮件已经成为人们提供信息交换的必要的通信方式。电子邮件系统通过连接全世界的Internet,实现各类信号的传送、接收、存贮等处理,将邮件送到世界的各个角落,不只局限于信件的传递,还可用来传递文件、声音及图形、图像等不同类型的信息。  相似文献   

19.
A design procedure is presented for neural associative memories storing gray-scale images. It is an evolution of a previous work based on the decomposition of the image with 2/sup L/ gray levels into L binary patterns, stored in L uncoupled neural networks. In this letter, an L-layer neural network is proposed with both intralayer and interlayer connections. The connections between different layers introduce interactions among all the neurons, increasing the recall performance with respect to the uncoupled case. In particular, the proposed network can store images with the commonly used number of 256 gray levels instead of 16, as in the previous approach.  相似文献   

20.
Image decomposition aims to separate different features in images. Based on dictionary learning (DL) techniques, this letter discusses two new algorithms for image decomposing into a linear combination of morphological components. The proposed algorithms can be viewed as the extensions of DL-based image denoising algorithm. Experiments show that the learned dictionaries by the proposed algorithms can describe the different components of image effectively and leads to high quality image decomposition performance.  相似文献   

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