Publication statistics

Pub. period:2000-2012
Pub. count:8
Number of co-authors:17


Number of publications with 3 favourite co-authors:

Megha Sandesh:
Gabriel Reyes:
Vinay Bettadapura:



Productive colleagues

Irfan Essa's 3 most productive colleagues in number of publications:

Gregory D. Abowd:116
Elizabeth D. Mynat..:71
Richard Catrambone:21

Upcoming Courses

go to course
Become a UX Designer from scratch
go to course
User Research - Methods and Best Practices
Starts the day after tomorrow !

Featured chapter

Marc Hassenzahl explains the fascinating concept of User Experience and Experience Design. Commentaries by Don Norman, Eric Reiss, Mark Blythe, and Whitney Hess

User Experience and Experience Design !


Our Latest Books

The Glossary of Human Computer Interaction
by Mads Soegaard and Rikke Friis Dam
start reading
The Social Design of Technical Systems: Building technologies for communities. 2nd Edition
by Brian Whitworth and Adnan Ahmad
start reading
Gamification at Work: Designing Engaging Business Software
by Janaki Mythily Kumar and Mario Herger
start reading
The Social Design of Technical Systems: Building technologies for communities
by Brian Whitworth and Adnan Ahmad
start reading
The Encyclopedia of Human-Computer Interaction, 2nd Ed.
by Mads Soegaard and Rikke Friis Dam
start reading

Irfan Essa


Publications by Irfan Essa (bibliography)

 what's this?
Edit | Del

Thomaz, Edison, Bettadapura, Vinay, Reyes, Gabriel, Sandesh, Megha, Schindler, Grant, Plotz, Thomas, Abowd, Gregory D. and Essa, Irfan (2012): Recognizing water-based activities in the home through infrastructure-mediated sensing. In: Proceedings of the 2012 International Conference on Uniquitous Computing 2012. pp. 85-94.

Activity recognition in the home has been long recognized as the foundation for many desirable applications in fields such as home automation, sustainability, and healthcare. However, building a practical home activity monitoring system remains a challenge. Striking a balance between cost, privacy, ease of installation and scalability continues to be an elusive goal. In this paper, we explore infrastructure-mediated sensing combined with a vector space model learning approach as the basis of an activity recognition system for the home. We examine the performance of our single-sensor water-based system in recognizing eleven high-level activities in the kitchen and bathroom, such as cooking and shaving. Results from two studies show that our system can estimate activities with overall accuracy of 82.69% for one individual and 70.11% for a group of 23 participants. As far as we know, our work is the first to employ infrastructure-mediated sensing for inferring high-level human activities in a home setting.

© All rights reserved Thomaz et al. and/or ACM Press

Edit | Del

Wang, Jing, Schindler, Grant and Essa, Irfan (2012): Orientation-aware scene understanding for mobile cameras. In: Proceedings of the 2012 International Conference on Uniquitous Computing 2012. pp. 260-269.

We present a novel approach that allows anyone to quickly teach their smartphone how to understand the visual world around them. We achieve this visual scene understanding by leveraging a camera-phone's inertial sensors to lead to both a faster and more accurate automatic labeling of the regions of an image into semantic classes (e.g. sky, tree, building). We focus on letting a user train our system from scratch while out in the real world by annotating image regions in situ as training images are captured on a mobile device, making it possible to recognize new environments and new semantic classes on the fly. We show that our approach outperforms existing methods, while at the same time performing data collection, annotation, feature extraction, and image segment classification all on the same mobile device.

© All rights reserved Wang et al. and/or ACM Press

Edit | Del

Diakopoulos, Nicholas, Goldenberg, Sergio and Essa, Irfan (2009): Videolyzer: quality analysis of online informational video for bloggers and journalists. In: Proceedings of ACM CHI 2009 Conference on Human Factors in Computing Systems 2009. pp. 799-808.

Tools to aid people in making sense of the information quality of online informational video are essential for media consumers seeking to be well informed. Our application, Videolyzer, addresses the information quality problem in video by allowing politically motivated bloggers or journalists to analyze, collect, and share criticisms of the information quality of online political videos. Our interface innovates by providing a fine-grained and tightly coupled interaction paradigm between the timeline, the time-synced transcript, and annotations. We also incorporate automatic textual and video content analysis to suggest areas of interest for further assessment by a person. We present an evaluation of Videolyzer looking at the user experience, usefulness, and behavior around the novel features of the UI as well as report on the collaborative dynamic of the discourse generated with the tool.

© All rights reserved Diakopoulos et al. and/or ACM Press

Edit | Del

Diakopoulos, Nicholas, Luther, Kurt, Medynskiy, Yevgeniy and Essa, Irfan (2007): The evolution of authorship in a remix society. In: Proceedings of the Eighteenth ACM Conference on Hypertext and Hypermedia 2007. pp. 133-136.

Authorship entails the constrained selection or generation of media and the organization and layout of that media in a larger structure. But authorship is more than just selection and organization; it is a complex construct incorporating concepts of originality, authority, intertextuality, and attribution. In this paper we explore these concepts and ask how they are changing in light of modes of collaborative authorship in remix culture. We present a qualitative case study of an online video remixing site, illustrating how the constraints of that environment are impacting authorial constructs. We discuss users' self-conceptions as authors, and how values related to authorship are reflected to users through the interface and design of the site's tools. We also present some implications for the design of online communities for collaborative media creation and remixing.

© All rights reserved Diakopoulos et al. and/or ACM Press

Edit | Del

Diakopoulos, Nicholas and Essa, Irfan (2006): Videotater: an approach for pen-based digital video segmentation and tagging. In: Proceedings of the ACM Symposium on User Interface Software and Technology 2006. pp. 221-224.

The continuous growth of media databases necessitates development of novel visualization and interaction techniques to support management of these collections. We present Videotater, an experimental tool for a Tablet PC that supports the efficient and intuitive navigation, selection, segmentation, and tagging of video. Our veridical representation immediately signals to the user where appropriate segment boundaries should be placed and allows for rapid review and refinement of manually or automatically generated segments. Finally, we explore a distribution of modalities in the interface by using multiple timeline representations, pressure sensing, and a tag painting/erasing metaphor with the pen.

© All rights reserved Diakopoulos and Essa and/or ACM Press

Edit | Del

Diakopoulos, Nicholas and Essa, Irfan (2005): Mediating photo collage authoring. In: Proceedings of the 2005 ACM Symposium on User Interface Software and Technology 2005. pp. 183-186.

The medium of collage supports the visualization of meaningful event summaries using photographs. It can however be rather tedious to author a collage from a large collection of photographs. In this work we present an approach that supports efficient construction of a collage by assisting the user with an automatic layout procedure that can be controlled at a high level. Our layout method utilizes a pre-designed template which consists of cells for photos and annotations applied to these cells. The layout is then filled by matching the metadata of photos to the annotations in the cells using an optimization algorithm. The user exercises flexibility in the authoring process by (a) maintaining high-level control through the types of constraints applied and (b) leveraging visual emphases supported by the layout algorithm. The user can of course provide fine-grained control of the final collage through direct manipulation. Off-loading the tedium of collage construction to a user controlled yet automated process clears the way for rapidly generating different views of the same album and could also support the increased sharing of digital photos in the form of compact collages.

© All rights reserved Diakopoulos and Essa and/or ACM Press

Edit | Del

Sukel, Katherine E., Catrambone, Richard, Essa, Irfan and Brostow, Gabriel (2003): Presenting Movement in a Computer-Based Dance Tutor. In International Journal of Human-Computer Interaction, 15 (3) pp. 433-452.

This article addresses how to present movement information to learners as part of a larger project on developing a nonconventional computational system that teaches ballet. The requirements of such a system are first described, and then discoveries regarding the first requirement, presenting movement to a user, are discussed. Background research regarding how people learn movement, hypotheses concerning presenting movement with computer animation versus videotape, and an experiment testing those hypotheses are presented. The experiment required individuals to perform movements after viewing them in one of the formats. Each participant viewed a movement sequence multiple times and then was evaluated on his or her performance of that movement by two expert judges. Animations resulted in higher performance ratings for individuals with some previous dance experience. Format did not affect performance for other learners. This result implies that domain knowledge interacts with presentation format in learning ballet. These results will influence the design and implementation of a computer-based dance tutor under development, and they point to several interesting research directions, including exploring the effects of multimodal sensory presentations and prior knowledge in learning movement.

© All rights reserved Sukel et al. and/or Lawrence Erlbaum Associates

Edit | Del

Mynatt, Elizabeth D., Essa, Irfan and Rogers, Wendy (2000): Increasing the Opportunities for Aging in Place. In: Proceedings of the 2000 ACM Conference on Universal Usability 2000. pp. 65-71.

A growing social problem in the U.S. and elsewhere is supporting older adults who want to continue living independently as opposed to moving to an institutional care setting. The "Aging in Place" project strives to delay taking that first step away from the family home. Through the careful placement of technological support we believe older adults can continue living in their own homes longer. The goal of our research is to take a three-pronged approach to understanding the potential of such environmental supports. The research team combines expertise in human-computer-interaction, computational perception, and cognitive aging. Together the team is assessing the feasibility of designing environments that aid older individuals in maintaining their independence. Based on our initial research, we are dividing this work into three parts: recognizing and adverting crisis, assisting daily routines, and supporting peace of mind for adult children.

© All rights reserved Mynatt et al. and/or ACM Press

Add publication
Show list on your website

Join our community and advance:




Join our community!

Page Information

Page maintainer: The Editorial Team