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Hanif Baharin, Stephen Viller, and Sean Rintel

SonicAIR is an ambient awareness technology probe designed to explore how connecting the soundscapes of friends or family members might reduce the isolation of seniors living independently. At its core, SonicAIR instruments kitchen activity sites to produce an always-on real-time aural representation of remote domestic rhythms. This paper reports how users in two pilot SonicAIR deployments used the sounds as resources for recognizing comfortable narratives of sociability. Used alongside telecare...

Publication details
Date: 1 July 2015
Type: Article
Publisher: ACM – Association for Computing Machinery
Helen J. Wang, Alexander Moshchuk, Michael Gamon, Mona Haraty, Shamsi Iqbal, Eli T. Brown, Ashish Kapoor, Chris Meek, Eric Chen, Yuan Tian, Jaime Teevan, Mary Czerwinski, and Susan Dumais

In this paper, we advocate “activity” to be a central abstraction between people and computing instead of applications. We outline the vision of the activity platform as the next-generation social platform.

Publication details
Date: 8 May 2015
Type: Technical report
Publisher: Microsoft Research
Number: MSR-TR-2015-38
Aditya Vashistha, Edward Cutrell, Gaetano Borriello, and William Thies

Interactive voice forums have emerged as a promising platform for people in developing regions to record and share audio messages using low-end mobile phones. However, one of the barriers to the scalability of voice forums is the process of screening and categorizing content, often done by a dedicated team of moderators. We present Sangeet Swara, a voice forum for songs and cultural content that relies on the community of callers to curate high-quality posts that are prioritized for playback to others....

Publication details
Date: 1 May 2015
Type: Inproceeding
Publisher: ACM – Association for Computing Machinery
Irene Rae, Bilge Mutlu, Gary M. Olson, Judith S. Olson, Leila Takayama, and Gina Venolia

As network availability becomes ubiquitous, users are leveraging this access to establish their presence in remote locations through the use of commercially available telepresence technologies. With the increasing adoption of systems, new questions are emerging about how these technologies affect user interactions and relationships. Our goal for this workshop is to bring an interdisciplinary group of telepresence researchers together to trade perspectives, fostering new opportunities for collaboration...

Publication details
Date: 18 April 2015
Type: Inproceeding
Publisher: ACM – Association for Computing Machinery
Dinei Florencio and Zhengyou Zhang

Estimating room impulse responses (RIRs) has a number of applications, including personalized audio, analyzing and improving acoustic behavior of concert halls, listening room compensation, sound source localization, and many others. RIRs have been estimated in essentially the same fashion for the last 50 years: Compute the cross correlation between a signal played at point A, and the signal received at point B. Best results are obtained when the signal played is white noise, or a maximum length...

Publication details
Date: 1 April 2015
Type: Inproceeding
Publisher: IEEE – Institute of Electrical and Electronics Engineers
Lijun Zhu and Dinei Florencio

Parametric speakers produce sound by emitting ultrasound, and using the small nonlinearity in air to demodulate it back to audible sound. The use of ultrasound allows for producing very narrow audio beams, which finds application in a number of military and consumer scenarios. However, designing better parametric speakers has been hard: closed-form solution of the nonlinear wave equation for generic geometries is nearly impossible, and the only existing solution was derived for the simple case of a...

Publication details
Date: 1 April 2015
Type: Inproceeding
Publisher: IEEE – Institute of Electrical and Electronics Engineers
Irene Rae, Gina Venolia, John C. Tang, and David Molnar

As a field, telepresence has grown to include a wide range of systems, from multi-view videoconferencing units to humanlike androids. However, the diversity of systems and research makes it difficult to form a holistic understanding of where the field stands. We propose a framework consisting of seven design dimensions for understanding telepresence, iteratively developed from previous literature, a series of three surveys, the construction of two design probes, and a field study. These design...

Publication details
Date: 14 March 2015
Type: Inproceeding
Publisher: ACM – Association for Computing Machinery
Gloria Mark, shamsi iqbal, mary czerwinski, and paul johns

While distractions using digital media have received

attention in HCI, understanding engagement in workplace

activities has been little explored. We logged digital activity

and continually probed perspectives of 32 information

workers for five days in situ to understand how attentional

states change with context. We present a framework of how

engagement and challenge in work relate to focus, boredom,

and rote work. Overall, we find more focused...

Publication details
Date: 1 March 2015
Type: Proceedings
Publisher: Proceedings of ACM CSCW 2014
Hao Cui, Ruiqin Xiong, Chong Luo, Zhihai Song, and Feng Wu
Publication details
Date: 1 February 2015
Type: Article
Number: 1
Henrik Sørensen, Kenton O’Hara, Phil Gosset, and Jesper Kjeldskov

While screen mirroring is an integral part of many video mediated collaborations, current systems are limited in their ability to include ad hoc screen mirroring from personal devices of collocated participants on each end of a video call. In this paper we introduce a system that addresses this limitation by enabling lightweight multi-user wireless smartphone mirroring within a video call. The system enables multiple smartphones to share both digital content as well as physical artefacts when mirroring...

Publication details
Date: 1 January 2015
Type: Inproceeding
Publisher: IFIP Interact 2015
Kenton O'Hara, Gerardo Gonzalez, Abigail Sellen, Graeme Penney, Varnavas, Helena Mentis, Antonio Criminisi, Robert Corish, Mark Rouncefield, Neville Dastur, and Tom Carrell
Publication details
Date: 1 December 2014
Type: Article
Aditya Vashistha, Erin Brady, William Thies, and Edward Cutrell

Low-income visually impaired people face a wide variety of educational challenges which are magnified in the developing world. Digital assistive technologies (such as screen readers) are typically out of reach, so individuals depend on Braille and audio recordings to access educational content. Unfortunately, there are acute shortages of Braille and high quality audio books for many subjects, leaving students scrambling for ways to continue their education. We present a formative study that examines the...

Publication details
Date: 1 December 2014
Type: Inproceeding
Publisher: ACM – Association for Computing Machinery
Azadeh Forghani, Gina Venolia, and Kori Inkpen

Telephone calls and videoconferencing are ubiquitous parts of everyday life. As the content of the call may extend beyond just words, people share applications and media using techniques such as screen sharing and email attachments. Little is known about the prevalence of this behavior and the benefits it can provide. We conducted a survey and a lab study to examine media sharing during a video call and found that it can be useful as well as emotionally engaging. Participants indicated that they would...

Publication details
Date: 11 November 2014
Type: Inproceeding
Publisher: ACM
Xiao Lin Liu, Wenjun Hu, Chong Luo, Qifan Pu, Feng Wu, and Yongguang Zhang
Publication details
Date: 1 November 2014
Type: Article
Number: 7
Seungwon Kim, Sasa Junuzovic, and Kori Inkpen

Mobile videoconferencing is increasingly being used to bring remote friends or family along to an activity happening outside the home, such as shopping or visiting a tourist attraction. We explored how including contextual information of the event, in addition to audio and video of the person at the event, impacts the shared experience. We studied three kinds of information: a map showing the position of the person at the activity, a second live video showing what was in front of that person, and a...

Publication details
Date: 1 November 2014
Type: Inproceeding
Publisher: ACM
Pengfei Wan, Gene Cheung, Dinei Florencio, Cha Zhang, and Oscar Au

While modern displays offer high dynamic range (HDR) with large bit-depth for each rendered pixel, the bulk of legacy image and video contents were captured using cameras with shallower bit-depth. In this paper, we study the bit-depth enhancement problem for images, so that a high bit-depth (HBD) image can be reconstructed from an input low bit-depth (LBD) image. The key idea is to apply appropriate smoothing given the constraints that reconstructed signal must lie within the per-pixel quantization...

Publication details
Date: 1 October 2014
Type: Inproceeding
Publisher: IEEE – Institute of Electrical and Electronics Engineers
Cha Zhang, Dinei Florencio, and Charles Loop

Compressing attributes on 3D point clouds such as colors or normal directions has been a challenging problem, since these attribute signals are unstructured. In this paper, we propose to compress such attributes with graph transform. We construct graphs on small neighborhoods of the point cloud by connecting nearby points, and treat the attributes as signals over the graph. The graph transform, which is equivalent to Kahunen-Loeve Transform on such graphs, is then adopted to decorrelate the signal....

Publication details
Date: 1 October 2014
Type: Inproceeding
Publisher: IEEE – Institute of Electrical and Electronics Engineers
Philippe Moquin, Kevin Venalainen, and Dinei Florencio

Publication details
Date: 1 October 2014
Type: Article
Publisher: Acoustical Society of America
Ismael Daribo, Dinei Florencio, and Gene Cheung

Depth image compression is important for compact representation of 3D visual data in texture-plus-depth format, where texture and depth maps from one or more viewpoints are encoded and transmitted. A decoder can then synthesize a freely chosen virtual view via depth-image-based rendering using nearby coded texture and depth maps as reference. Further, depth information can be used in other image processing applications beyond view synthesis, such as object identification, segmentation, and so on. In...

Publication details
Date: 23 September 2014
Type: Article
Publisher: IEEE – Institute of Electrical and Electronics Engineers
Mar Gonzalez-Franco and Philip A. Chou

In this paper, we further the characterization of a fundamental limit of human perception: the accuracy of human estimation of others’ eye gaze directions. In particular, we introduce a non-linear model that describes how both the head direction and the gaze direction of a looker relative to an observer jointly affect the observer’s perception of the looker’s gaze direction. Ours is the first to explain in a single model the biases introduced by the looker’s head direction, the relative accuracy of eye...

Publication details
Date: 1 September 2014
Type: Inproceeding
Publisher: IEEE – Institute of Electrical and Electronics Engineers
Publication details
Date: 1 September 2014
Type: Article
Publisher: IEEE – Institute of Electrical and Electronics Engineers
Number: 99
Hao Cui, Chong Luo, Chang Wen Chen, and Feng Wu
Publication details
Date: 1 August 2014
Type: Article
Number: 8
Wenxiu Sun, Gene Cheung, Phil Chou, Dinei Florencio, Cha Zhang, and Oscar Au

Transmitting compactly represented geometry of a dynamic 3D scene from a sender can enable a multitude of imaging functionalities at a receiver, such as synthesis of virtual images at freely chosen viewpoints via depth-image-based rendering. While depth maps-projections of 3D geometry onto 2D image planes at chosen camera viewpoints-can nowadays be readily captured by inexpensive depth sensors, they are often corrupted by non-negligible acquisition noise. Given depth maps need to be denoised and...

Publication details
Date: 1 July 2014
Type: Article
Publisher: IEEE – Institute of Electrical and Electronics Engineers
Alex Taylor, Siân Lindley, Tim Regan, and David Sweeney

What does the abundance of data and proliferation of data-making methods mean for the ordinary person, the person on the street? And, what could they come to mean? In this paper, we present an overview of a year-long project to examine just such questions and complicate, in some ways, what it is to ask them. The project is a collective exercise in which we—a mixture of social scientists, designers and makers—and those living and working on one street in Cambridge (UK), Tenison Road, are working to...

Publication details
Date: 1 July 2014
Type: Article
Publisher: Sage
Ha Q. Nguyen, Philip A. Chou, and Yinpeng Chen

The next step in immersive communication beyond video from a single camera is object-based free viewpoint video, which is the capture and compression of a dynamic object such that it can be reconstructed and viewed from an arbitrary viewpoint. The moving human body is a particularly useful subclass of dynamic object for object-based free viewpoint video relevant to both telepresence and entertainment. In this paper, we compress moving human body sequences by applying recently developed Graph Wavelet...

Publication details
Date: 1 May 2014
Type: Proceedings
Publisher: IEEE – Institute of Electrical and Electronics Engineers
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