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use of context in vision processing: An introduction to the UCVP 2009 workshop

Use of context in vision processing: An introduction to the ...

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workshop on use of Context in vision Processing, UCVP 2009, in conjunction with 11th International Conference on Multimodal Interfaces and workshop on Machine Learning for Multi-modal interaction, ICMI-MLMI 2009

作者： Aghajan, Hamid Braspenning, Ralph Ivanov, Yuri Morency, Louis-Philippe Nijholt, Anton Pantic, Maja Yang, Ming-Hsuan Stanford University Stanford United States Philips Research Eindhoven Netherlands MERL Research Cambridge United States University of Southern California Marina del Rey United States University of Twente Enschede Netherlands Imperial College London United Kingdom Univ. of California Merced United States

ISBN: (纸本)9781605586915

Recent efforts in defining ambient intelligence applications based on user-centric concepts, the advent of technology in different sensing modalities as well as the expanding interest in multi-modal information fusion and situation-aware and dynamic vision processing algorithms have created a common motivation across different research disciplines to utilize context as a key enabler of application-oriented vision systems design. Improved robustness, efficient use of sensing and computing resources, dynamic task assignment to different operating modules as well as adaptation to event and user behavior models are among the benefits a vision processing system can gain through the utilization of contextual information. The workshop on use of Context in vision Processing (UCVP) aims to address the opportunities in incorporating contextual information in algorithm design for single or multi-camera vision systems, as well as systems in which vision is complemented with other sensing modalities, such as audio, motion, proximity, occupancy, and others. Copyright 2009 ACM.

关键词： Object recognition

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vision Labs: Seeing UCD as a relational practice 08

Vision Labs: Seeing UCD as a relational practice

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20th Australasian Conference on computer-human interaction: Designing for Habitus and Habitat, OZCHI'08

作者： Bødker, Mads Nielsen, Janni Copenhagen Business School Denmark

ISBN: (纸本)0980306345

Relational aspects in user-centered design, UCD, are largely overlooked in the literature. We use criticism of UCD to facilitate a discussion of how discourse, activities, and materials give shape to user involvement in design activities. Drawing on experiments with the workshop format for devising innovations and creative solutions with users, we introduce some criteria and points of interest in the development of a workshop format we call vision Labs.

关键词： user centered design

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Sound and Tangible Interface for shape Evaluation and Modification

Sound and Tangible Interface for shape Evaluation and Modifi...

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7th IEEE International workshop on Haptic Audio Visual Environments and their Applications

作者： Bordegoni, M. Ferrise, F. Shelley, S. Alonso, M. A. Hermes, D. Politecn Milan Dipartimento Meccan Via La Masa 1 I-20156 Milan Italy Eindhoven Univ Technol Human Technol Interact NL-5600 MB Eindhoven Netherlands

ISBN: (纸本)9781424426683

One of the recent research topics in the area of design and virtual prototyping is offering designers tools for creating and modifying shapes in a natural and interactive way. Multimodal interaction is part of this research. It allows conveying to the users information through different sensory channels. The use of more modalities than touch and vision augments the sense of presence in the virtual environment and can be useful to present the same information in various ways. In addition, multimodal interaction can sometimes be used to augment the perception of the user by transferring information that is not generally perceived in the real world, but which can be emulated by the virtual environment. The paper presents a prototype of a system that allows designers to evaluate the quality of a shape with the aid of touch, vision and sound. Sound is used to communicate geometrical data, relating to the virtual object, which are practically undetectable through touch and vision. In addition, the paper presents the preliminary work carried out on this prototype and the results of the first tests made in order to demonstrate the feasibility The problems related to the development of this kind of application and the realization of the prototype itself are highlighted This paper also focuses on the potentialities and the problems relating to the use of multimodal interaction, in particular the auditory channel.

关键词： haptic audio & visual sensors and displays human-computer interaction

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Studying vision-based multiple-user interaction with in-home large displays

Studying vision-based multiple-user interaction with in-home...

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3rd ACM International workshop on human-Centered Computing, HCC 2008, Co-located with the 2008 ACM International Conference on Multimedia, MM'08

作者： You, Wei Fels, Sidney Lea, Rodger University of British Columbia Vancouver Canada

ISBN: (纸本)9781605583204

Large displays at home such as TVs are becoming larger in size and more interactive in functionality. When multiple co-located users share the screen space of a large display, when, where and how to display their media contents becomes an issue. This paper compares the use of automatic versus manual methods for managing personal screen real-estate on large in-home displays. We assume horizontally laid out "personal interaction spaces" as the user interface for multiple users to manage their screen real-estate. In this case, users need to sign in and out as well as have their personal spaces placed on the display. We constructed a computer-vision based system that tracks the identities and positions of multiple people in front of the display to support the user studies that compare the use of tracker-based mechanisms versus manual ones for managing the display. Our results suggest that the tracking system shows promise for a) simplifying the user registration process in conjunction with a manual sign-in/out process and b) effective tracker-based user-centric placement of people's interaction space. Proper integration of manual methods could improve the sense of control and ownership for users. © 2008 ACM.

关键词： user interfaces

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human robot interaction through simple expressions for object recognition

Human robot interaction through simple expressions for objec...

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IEEE International workshop on Robot and human Communication (ROMAN)

作者： Al Mansur Katsutoshi Sakata Tajin Rukhsana Yoshinori Kobayashi Yoshinori Kuno Department of Information and Computer Sciences Saitama University Saitama Japan

Service robots need to be able to recognize and identify objects located within complex backgrounds. Since no single method may work in every situation, several methods need to be combined. However, there are several cases when autonomous recognition methods fail. We propose an interactive recognition method in these cases. To develop a natural human robot interaction (HRI), it is necessary that the robot should unambiguously perceive the description of an object given by human. This paper reports on our experiment in which we examined the expressions humans use in describing ordinary objects. The results show that humans typically describe objects using one of multiple colors. The color is usually either that of the object background or that of the largest object portion. Based on these results, we describe our development of a robot vision system that can recognize objects when a user adopts simple expressions to describe the objects. This research suggests the importance of connecting dasiasymbolic expressionspsila with the dasiareal worldpsila in human-robot interaction.

关键词： Robots

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A customizable camera-based human computer interaction system allowing people with disabilities autonomous hands-free navigation of multiple computing tasks

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9th workshop on user Interfaces for All

作者： Akram, Wajeeha Tiberii, Laura Betke, Margrit Boston Univ Dept Comp Sci 111 Cummington St Boston MA 02215 USA

ISBN: (纸本)9783540710240

Many people suffer from conditions that lead to deterioration of motor control making access to the computer using traditional input devices difficult. In particular, they may loose control of hand movement to the extent that the standard mouse cannot be used as a pointing device. Most current alternatives use markers or specialized hardware, for example, wearable devices, to track and translate a user's movement to pointer movement. These approaches may be perceived as intrusive. Camera-based assistive systems that use visual tracking of features on the user's body often require cumbersome manual adjustment. This paper introduces an enhanced computer vision based strategy where features, for example on a user's face, viewed through an inexpensive USB camera, are tracked and translated to pointer movement. The main contributions of this paper are (1) enhancing a video based interface with a mechanism for mapping feature movement to pointer movement that allows users to navigate to all areas of the screen even with very limited physical movement and (2) providing a customizable, hierarchical navigation framework for human computer interaction (HCI). This framework provides effective use of the vision-based interface system for accessing multiple applications in an autonomous setting. Experiments with several users show the. effectiveness of the mapping strategy and its usage within the application framework as a practical tool for desktop users with disabilities.

关键词： computer-vision assistive technology alternative input devices video-based human-computer interfaces autonomous navigation

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High precision multi-touch sensing on surfaces using overhead cameras

High precision multi-touch sensing on surfaces using overhea...

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2nd Annual IEEE International workshop on Horizontal Interactive human-Computed Systems

作者： Agarwal, Ankur Izadi, Shahram Chandraker, Manmohan Blake, Andrew Microsoft Res Cambridge 7 J J Thomson Ave Cambridge CB3 0FB England

ISBN: (纸本)9780769530130

We present a method to enable multi-touch interactions on an arbitrary flat surface using a pair of cameras mounted above the surface. Current systems in this domain mostly make use of special touch-sensitive hardware, require cameras to be mounted behind the display, or are based on infrared sensors used in various configurations. The very few that use ordinary cameras mounted overhead for touch detection fail to do so accurately due to the difficult), in computing the proximity of fingertips to the surface with a precision that would match the behaviour of a truly touch-sensitive surface. This paper describes a novel computer vision algorithm that can robustly identify finger tips and detect touch with a precision of a few millimetres above the surface. The algorithm relies on machine learning methods and a geometric finger model to achieve the required precision, and can be 'trained' to work in different physical settings. We provide a quantitative evaluation of the method and demonstrate its use for gesture based interactions with ordinary tablet displays, both in single user and remote collaboration scenarios.

关键词： interactive surfaces bimanual interaction multi-touch detection hand gestures computer vision

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Depth-sensing video cameras for 3D tangible tabletop interaction

Depth-sensing video cameras for 3D tangible tabletop interac...

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2nd Annual IEEE International workshop on Horizontal Interactive human-Computed Systems

作者： Wilson, Andrew D. Microsoft Res Olympia WA 98502 USA

ISBN: (纸本)9780769530130

Recently developed depth-sensing video camera technologies provide precise per-pixel range data in addition to color video. Such cameras will find application in robotics and vision-based human computer interaction scenarios such as games and gesture input systems. We present an interactive tabletop system which uses a depth-sensing camera to build a height map of the objects on the table surface. This height map is used in a driving simulation game that allows players to drive a virtual car over real objects placed on the table. Players can use folded bits of paper, for example, to lay out a course of ramps and other obstacles. A projector displays the position of the car on the surface, such that when the car is driven over a ramp, for example, it jumps appropriately. A second display shows a synthetic graphical view of the p entire surface, or a traditional arcade view from behind the car. Micromotorcross is a fun initial investigation into the applicability of depth-sensing cameras to tabletop interfaces. We present details on its implementation, and speculate on how this technology will enable new tabletop interactions.

关键词： Video cameras

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Using image flow to detect eye blinks in color videos

Using image flow to detect eye blinks in color videos

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7th IEEE workshop on Applications of computer vision, WACV 2007

作者： Heishman, Rie Duric, Zoran Department of Computer Science George Mason University Fairfax VA 22030 United States

ISBN: (纸本)0769527949

Static computer vision techniques enable non-intrusive observation and analysis of biometrics such as eye blinks. However, ambiguous eye behaviors such as partial blinks and asymmetric eyelid movements present problems that computer vision techniques relying on static appearance alone cannot solve reliably. Image flow analysis enables reliable and efficient interpretation of these ambiguous eye blink behaviors. In this paper we present a method for using image flow analysis to compute problematic eye blink parameters. The flow analysis produces the magnitude and direction of the eyelid movement. A deterministic finite state machine uses the eyelid movement data to compute blink parameters (e.g., blink count, blink rate, and other transitional statistics) for use in human computer interaction applications across a wide range of disciplines. We conducted extensive experiments employing this method on approximately 750K color video frames of five subjects. © 2007 IEEE.

关键词： Color image processing

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Towards adaptive object recognition for situated human-computer interaction

Towards adaptive object recognition for situated human-compu...

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workshop on Multimodal Interfaces in Semantic interaction, WMISI 2007 - 9th International Conference on Multimodal Interfaces, ICMI 2007

作者： Saenko, Kate Darrell, Trevor Massachusets Institute of Technology Cambridge MA United States

ISBN: (纸本)9781595938695

Object recognition is an important part of human-computer interaction in situated environments, such as a home or an office. Especially useful is category-level recognition (e.g., recognizing the class of chairs, as opposed to a particular chair.) While humans can employ multimodal cues for cate-gorizing objects during situated conversational interactions, most computer algorithms currently rely on vision-only or speech-only recognition. We are developing a method for learning about physical objects found in a situated environment based on visual and spoken input provided by the user. The algorithm operates on generic databases of labeled object images and transcribed speech data, plus unlabeled audio and images of a user refering to objects in the environment. By exploiting the generic labeled databases, the algorithm would associate probable object-referring words with probable visual representations of those objects, and use both modalities to determine the object label. The first advantage of this approach over visual-only or speech-only recognition is the ability to disambiguate object categories using complementary information sources. The second advantage is that, using the additional unlabeled data gathered during the interaction, the system can potentially improve its recognition of new category instances in the physical environment in which it is situated, as well as of new utterances spoken by the same user, compared to a system that uses only the generic labeled databases. It can achieve this by adapting its generic object classifiers and its generic speech and language models. Copyright 2007 ACM.

关键词： human computer interaction

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