检索结果-内蒙古大学图书馆

ACM TRANSACTIONS ON MULTIMEDIA COMPUTING COMMUNICATIONS AND APPLICATIONS 2009年第4期5卷 29-29页

作者： Cha, Jongeun Eid, Mohamad El Saddik, Abdulmotaleb Univ Ottawa Multimedia Commun Res Lab Sch Informat Technol & Engn Ottawa ON K1N 6N5 Canada

Multimedia technologies are reaching the limits of providing audio-visual media that viewers consume passively. An important factor, which will ultimately enhance the user's experience in terms of impressiveness and immersion, is interaction. Among daily life interactions, haptic interaction plays a prominent role in enhancing the quality of experience of users, and in promoting physical and emotional development. Therefore, a critical step in multimedia research is expected to bring the sense of touch, or haptics, into multimedia systems and applications. This article proposes a touchable 3D video system where viewers can actively touch a video scene through a force-feedback device, and presents the underlying technologies in three functional components: (1) contents generation, (2) contents transmission, and (3) viewing and interaction. First of all, we introduce a depth image-based haptic representation (DIBHR) method that adds haptic and heightmap images, in addition to the traditional depth image-based representation (DIBR), to encode the haptic surface properties of the video media. In this representation, the haptic image contains the stiffness, static friction, and dynamic friction, whereas the heightmap image contains roughness of the video contents. Based on this representation method, we discuss how to generate synthetic and natural (real) video media through a 3D modeling tool and a depth camera, respectively. Next, we introduce a transmission mechanism based on the MPEG-4 framework where new MPEG-4 BIFS nodes are designed to describe the haptic scene. Finally, a haptic rendering algorithm to compute the interaction force between the scene and the viewer is described. As a result, the performance of the haptic rendering algorithm is evaluated in terms of computational time and smooth contact force. It operates marginally within a 1 kHz update rate that is required to provide stable interaction force and provide smoother contact force with the depth image

关键词： Design algorithms haptic surface properties haptic rendering algorithm video representation

来源：评论

学校读者我要写书评

暂无评论

DIBHR: Depth Image-Based haptic rendering

DIBHR: Depth Image-Based Haptic Rendering

引用

6th Eurohaptics International Conference

作者： Cha, Jongeun Eid, Mohamad El Saddik, Abdulmotaleb Univ Ottawa Multimedia Commun Res Lab Ottawa ON K1N 6N5 Canada

ISBN: (纸本)9783540690566

This paper presents Depth Image-Based haptic rendering (DIBHR), a haptic rendering algorithm that enables users to haptically explore 3D video media based on depth image-based representation (DIBR). The algorithm computes the shortest proxy (god-object) path along which the proxy goes into the local distance minimum to the goal (haptic interaction point) constrained on surface in order to obtain correct friction force when the friction cone algorithm is applied. This algorithm is based on the god-object [3] concept and adopted the neighborhood search algorithm [5][6]. The experiments compare DIBHR with two previous algorithms [5][6] as per computation time and smoothness of resultant force rendering. The results show slower computation time yet within 1 millisecond and smoother force with friction.

关键词： haptic rendering algorithm depth image

来源：评论

学校读者我要写书评

暂无评论

Advanced methods for a realistic styling

引用

CIRP ANNALS-MANUFACTURING TECHNOLOGY 2005年第1期54卷 143-146页

作者： Krause, FL Biahmou-Tchebetchou, AR Tech Univ Berlin Inst Machine Tools & Factory Management IWF Ind Informat Technol Div Berlin Germany

One of the challenges of computer aided styling (CAS) consists in rendering surface forces, which are generated by the interaction of modelling tools and workpieces. Moreover, designers miss the form of real modelling tools when using less intuitive devices for interacting with digital systems. This paper describes methods, which allow a realistic virtual prototyping by not only taking the form factor into account, but also the appropriate haptic rendering algorithms as well.

关键词： conceptual design method haptic rendering algorithm

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：