基于多尺度形状描述子的手势识别

随着计算机性能的提高和人机交互技术的发展,手势识别越来越受到人们的重视,尤其是基于视觉通道的手势识别,使人机交互变得更加便捷。但由于人手是复杂形变体,现有的方法对运动过程中手的形变的描述不够充分。该文从视觉角度提出了一种新的手势建模的方法-多尺度形状描述子。从分析手的基本形状入手,利用了圆形的轴对称和中心对称的几何特点,具有旋转和尺度不变性。该描述子从多个尺度对手势进行形状描述,在一定程度上解决了手势的精细区分问题。     

基于视觉的手势识别技术

近年来计算机已经成为人们日常生活的一部分,人们与计算机的交互也日益成为科研领域的热点.基于视觉的手势识别是实现新一代人机交互所不可缺少的一项关键技术,而手势识别的研究也可促进手语识别的发展,从而消除健全人与聋哑人之间的交流障碍,使他们能获得健全人的正常生活,帮忙他们参加社会的各项活动.文中介绍了手势识别方法的发展、手势识别的技术难点,具体阐述了基于视觉的手势识别系统原理和组成,手势的建模以及在手势识别中常用的技术方法.     

基于手势识别的人机交互算法研究

随着人机交互技术的日益成熟,人机交互技术中的手势识别已成为计算机视觉领域的一个重要课题,而手势交互是人机交互中的一种重要方式。手势识别技术日益受到社会各界的广泛关注。虽然手势识别技术应用广泛,但是存在诸多困难与挑战,尤其是动态手势识别。动态手势的挑战主要来自不可预测的环境和手势识别特性,例如光照变化、与手势特征近似的背景区域干扰、目标遮挡等。基于此,研究了一种基于手势识别算法的人机交互系统。手势识别算法包括图像采集、二值化处理、质心计算、数据筛选和方向量化。     

基于手势识别的人机交互技术

文章将现有人机交互方法与基于计算机视觉交互方法进行了对比,列举了该交互技术的优点及可行性,并提出了一种利用摄像头采集手势进行人机界面交互的方法,研究了并进一步实现了基于图像的手势分析、识别等关键技术.通过一系列实验结果表明,基于文中技术实现的一套系统能够实时地跟踪手的运动,并识别出手势结果,实现实时的人机手势交互.     

基于视觉的手势识别技术

近年来计算机已经成为人们日常生活的一部分,人们与计算机的交互也日益成为科研领域的热点。基于视觉的手势识别是实现新一代人机交互所不可缺少的一项关键技术,而手势识别的研究也可促进手语识别的发展,从而消除健全人与聋哑人之间的交流障碍,使他们能获得健全人的正常生活,帮忙他们参加社会的各项活动。文中介绍了手势识别方法的发展、手势识别的技术难点,具体阐述了基于视觉的手势识别系统原理和组成,手势的建模以及在手势识别中常用的技术方法。     

复杂背景下的手势分割与识别

目前在基于单目视觉的手势识别中,手势分割技术几乎都是基于简单的背景或者要求 手势者带有特殊颜色的手套,给人机交互增加了一定的限制.本文融合人手颜色信息和手势运 动信息,两次利用种子算法对复杂背景下的手势进行分割.根据分割出的手区域大大加速了运动 特征参数的提取,并结合手区域的形状特征,建立手势的时空表观模型.识别时,采用独立分布的 多状态高斯概率模型,进行时间规整.手势训练集和测试集的识别率分别为97.8%和95.6%.     

适用于机器人视觉的手势识别系统

手势是一种高效的人机交互和设备控制的方式,基于视觉的手势识别是人机交互、模式识别等领域的一个富有挑战性的研究课题。文章提出并实现了一个可用于与机器人交互的静态手势检测和识别系统。该系统用摇动检测的方法定位人手;用基于现场采样得到的肤色模型进行手的分割;用简化并改进的CAMSHIFT算法对手势进行跟踪;最后用模式识别的方法提取简单特征进行识别。实验证明,该系统快速、稳定而有效。     

基于视觉的动态手势识别研究综述

手势自古以来在人类交流方面扮演着非常重要的角色,而基于视觉的动态手势识别技术是利用计算机视觉、物联网感知等新兴技术和3D视觉传感器等新型设备让机器能够理解人类的手势,从而让人类能和机器更好地交流,因此对于人机交互等领域的研究很有意义。介绍了动态手势识别中所用到的传感器技术,并比较了相关传感器的技术参数。通过追踪近年来国内外关于视觉的动态手势识别技术,陈述了动态手势识别的处理流程：手势检测与分割、手势追踪、手势分类。通过对比各流程所涉及的方法,可以发现深度学习具有较强的容错性、高度并行性、抗干扰性等一系列优点,在手势识别领域取得了远高于传统学习算法的成就。最后分析了动态手势识别目前遇到的挑战和未来可能的发展方向。     

基于自适应遗传算法的手势识别

基于小样本库的手势识别是先进人机交互研究中的一个重要分支.根据Tortoise人手模型训练手势模式库并结合交互者的具体手部特征进行手形训练,生成适用于特定交互者的手势模式库.在交互过程中,根据来自一个或多个同步摄像头的视频信息进行基于自适应遗传算法的手势识别.实验结果表明,在环境光照基本稳定的条件下,文中算法可以实现鲁棒的实时手势识别.     

基于计算机视觉的手势检测识别技术

经过多年的发展,计算机技术已经逐渐成熟,各种新硬件、新软件层出不穷,为人们日常的生产生活带来了巨大便利,但人类在接触计算机的过程中仍然基本上只能够通过键盘、鼠标等部件,而这也在一定程度上影响了人类与计算机的深入交流.因此当前出现了一种新的人机交互方式,即基于计算机视觉的手势检测识别,本文将在此背景之下,通过简单介绍基于计算机视觉的手势检测识别的算法流程,着重围绕基于计算机视觉的手势检测识别技术进行探究.     

Hidden Markov model for human to computer interaction: a study on human hand gesture recognition

Human hand recognition plays an important role in a wide range of applications ranging from sign language translators, gesture recognition, augmented reality, surveillance and medical image processing to various Human Computer Interaction (HCI) domains. Human hand is a complex articulated object consisting of many connected parts and joints. Therefore, for applications that involve HCI one can find many challenges to establish a system with high detection and recognition accuracy for hand posture and/or gesture. Hand posture is defined as a static hand configuration without any movement involved. Meanwhile, hand gesture is a sequence of hand postures connected by continuous motions. During the past decades, many approaches have been presented for hand posture and/or gesture recognition. In this paper, we provide a survey on approaches which are based on Hidden Markov Models (HMM) for hand posture and gesture recognition for HCI applications.     

一种面向实时交互的变形手势跟踪方法

变形手势跟踪是基于视觉的人机交互研究中的一项重要内容.单摄像头条件下,提出一种新颖的变形手势实时跟踪方法.利用一组2D手势模型替代高维度的3D手模型.首先利用贝叶斯分类器对静态手势进行识别,然后对图像进行手指和指尖定位,通过将图像特征与识别结果进行匹配,实现了跟踪过程的自动初始化.提出将K-means聚类算法与粒子滤波相结合,用于解决多手指跟踪问题中手指互相干扰的问题.跟踪过程中进行跟踪状态检测,实现了自动恢复跟踪及手势模型更新.实验结果表明,该方法可以实现对变形手势快速、准确的连续跟踪,能够满足基于视觉的实时人机交互的要求.     

Human–computer interaction using vision-based hand gesture recognition systems: a survey

Considerable effort has been put toward the development of intelligent and natural interfaces between users and computer systems. In line with this endeavor, several modes of information (e.g., visual, audio, and pen) that are used either individually or in combination have been proposed. The use of gestures to convey information is an important part of human communication. Hand gesture recognition is widely used in many applications, such as in computer games, machinery control (e.g., crane), and thorough mouse replacement. Computer recognition of hand gestures may provide a natural computer interface that allows people to point at or to rotate a computer-aided design model by rotating their hands. Hand gestures can be classified into two categories: static and dynamic. The use of hand gestures as a natural interface serves as a motivating force for research on gesture taxonomy, its representations, and recognition techniques. This paper summarizes the surveys carried out in human--computer interaction (HCI) studies and focuses on different application domains that use hand gestures for efficient interaction. This exploratory survey aims to provide a progress report on static and dynamic hand gesture recognition (i.e., gesture taxonomies, representations, and recognition techniques) in HCI and to identify future directions on this topic.     

融合关节旋转特征和指尖距离特征的手势识别

作为人机交互的重要方式,手势交互和识别由于其具有的高自由度而成为计算机图形学、虚拟现实与人机交互等领域的研究热点.传统直接提取手势轮廓或手部关节点位置信息的手势识别方法,其提取的特征通常难以准确表示手势之间的区别.针对手势识别中不同手势具有的高自由度以及由于手势图像分辨率低、背景杂乱、手被遮挡、手指形状尺寸不同、个体差异性导致手势特征表示不准确等问题,本文提出了一种新的融合关节旋转特征和指尖距离特征的手势特征表示与手势识别方法.首先从手势深度图中利用手部模板并将手部看成链段结构提取手部20个关节点的3D位置信息;然后利用手部关节点位置信息提取四元数关节旋转特征和指尖距离特征,该表示构成了手势特征的内在表示;最后利用一对一支持向量机对手势进行有效识别分类.本文不仅提出了一种新的手势特征表示与提取方法,该表示融合了关节旋转信息和指尖距离特征;而且从理论上证明了该特征表示能唯一地表征手势关节点的位置信息;同时提出了基于一对一SVM多分类策略进行手势分类与识别.对ASTAR静态手势深度图数据集中8类中国数字手势和21类美国字母手势数据集分别进行了实验验证,其分类识别准确率分别为99.71%和85.24%.实验结果表明,本文提出的基于关节旋转特征和指尖距离特征的融合特征能很好地表示不同手势的几何特征,能准确地表征静态手势并进行手势识别.     

Visual interpretation of hand gestures for human-computerinteraction: a review

The use of hand gestures provides an attractive alternative to cumbersome interface devices for human-computer interaction (HCI). In particular, visual interpretation of hand gestures can help in achieving the ease and naturalness desired for HCI. This has motivated a very active research area concerned with computer vision-based analysis and interpretation of hand gestures. We survey the literature on visual interpretation of hand gestures in the context of its role in HCI. This discussion is organized on the basis of the method used for modeling, analyzing, and recognizing gestures. Important differences in the gesture interpretation approaches arise depending on whether a 3D model of the human hand or an image appearance model of the human hand is used. 3D hand models offer a way of more elaborate modeling of hand gestures but lead to computational hurdles that have not been overcome given the real-time requirements of HCI. Appearance-based models lead to computationally efficient “purposive” approaches that work well under constrained situations but seem to lack the generality desirable for HCI. We also discuss implemented gestural systems as well as other potential applications of vision-based gesture recognition. Although the current progress is encouraging, further theoretical as well as computational advances are needed before gestures can be widely used for HCI. We discuss directions of future research in gesture recognition, including its integration with other natural modes of human-computer interaction     

Feature fusion for 3D hand gesture recognition by learning a shared hidden space

Hand gesture recognition has been intensively applied in various human-computer interaction (HCI) systems. Different hand gesture recognition methods were developed based on particular features, e.g., gesture trajectories and acceleration signals. However, it has been noticed that the limitation of either features can lead to flaws of a HCI system. In this paper, to overcome the limitations but combine the merits of both features, we propose a novel feature fusion approach for 3D hand gesture recognition. In our approach, gesture trajectories are represented by the intersection numbers with randomly generated line segments on their 2D principal planes, acceleration signals are represented by the coefficients of discrete cosine transformation (DCT). Then, a hidden space shared by the two features is learned by using penalized maximum likelihood estimation (MLE). An iterative algorithm, composed of two steps per iteration, is derived to for this penalized MLE, in which the first step is to solve a standard least square problem and the second step is to solve a Sylvester equation. We tested our hand gesture recognition approach on different hand gesture sets. Results confirm the effectiveness of the feature fusion method.     

Visual Recognition of Static/Dynamic Gesture: Gesture-Driven Editing System

This paper presents the visual recognition of static gesture (SG) or dynamic gesture (DG). Gesture is one of the most natural interface tools for human–computer interaction (HCI) as well as for communication between human beings. In order to implement a human-like interface, gestures could be recognized using only visual information such as the visual mechanism of human beings; SGs and DGs can be processed concurrently as well. This paper aims at recognizing hand gestures obtained from the visual images on a 2D image plane, without any external devices. Gestures are spotted by a task-specific state transition based on natural human articulation. SGs are recognized using image moments of hand posture, while DGs are recognized by analyzing their moving trajectories on the hidden Markov models (HMMs). We have applied our gesture recognition approach to gesture-driven editing systems operating in real time.     

Hand posture and gesture recognition technology

Hand gestures that are performed by one or two hands can be categorized according to their applications into different categories including conversational, controlling, manipulative and communicative gestures. Generally, hand gesture recognition aims to identify specific human gestures and use them to convey information. The process of hand gesture recognition composes mainly of four stages: hand gesture images collection, gesture image preprocessing using some techniques including edge detection, filtering and normalization, capture the main characteristics of the gesture images and the evaluation (or classification) stage where the image is classified to its corresponding gesture class. There are many methods that have been used in the classification stage of hand gesture recognition such as Artificial Neural Networks, template matching, Hidden Markov Models and Dynamic Time Warping. This exploratory survey aims to provide a progress report on hand posture and gesture recognition technology.     

动态手势理解与交互综述

近年来,手势作为一种输入通道,已在人机交互、虚拟现实等领域得到了广泛的应用,引起了研究者的关注.特别是随着先进人机交互技术的出现以及计算机技术（特别是深度学习、GPU并行计算等）的飞速发展,手势理解和交互方法取得了突破性的成果,引发了研究的热潮.综述了动态手势理解与交互的研究进展与典型应用：首先阐述手势交互的核心概念,分析了动态手势识别与检测进展;而后阐述了动态手势交互在人机交互中的代表性应用,并总结了手势交互现状,分析了下一步的发展趋势.