Ravin Balakrishnan

Professor & Chair
Department of Computer Science

University of Toronto

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Publications Courses Students & Postdocs Brief Biography Professional Activities Directions to my office

Research/personal contact: email: ravin at dgp.toronto.edu voice: (416) 978-5359 office: Rm BA5270, 40 St. George St, Toronto lab: Dynamic Graphics Project Department chair contact: email: chair at cs.toronto.edu voice: (416) 978-2980

postal mail & courier address: Ravin Balakrishnan Department of Computer Science University of Toronto 10 King's College Road, Room 3302 Toronto, Ontario Canada M5S 3G4 Tel (for courier): 416 978-6025

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Publications

Refereed papers

	118.	Dustin Freeman, Ravin Balakrishnan. (2011). Tangible actions. Proceedings of ITS 2011 – the ACM International Conference on Interactive Tabletops and Surface. p. 87-96. video
	117.	Yannick Thiel, Karan Singh, Ravin Balakrishnan. (2011). Elasticurves: Exploiting stroke dynamics and inertia for the real-time neatening of sketched 2D curves. Proceedings of UIST 2011 – the ACM Symposium on User Interface Software and Technology. p. 383-392. video
	116.	Jian Zhao, Fanny Chevalier, Emmanuel Pietriga, Ravin Balakrishnan. (2011). Exploratory analysis of time-series with ChronoLenses. IEEE Transactions on Visualization and Computer Graphics, 17(12). p. 2422-2431. video
	115.	Sajad Shirali-Shahreza, Yashar Ganjali, Ravin Balakrishnan. (2011). Verifying human users in speech-based interactions. Proceedings of the Annual Conference of the International Speech Communication Association (INTERSPEECH). p. 1585-1588.
	114.	Akhil Mathur, Divya Ramachandran, Ed Cutrell, Ravin Balakrishnan. (2011). An exploratory study on the use of camera phones and pico projectors in rural India. Proceedings of MobileHCI 2011. p. 347-356.
	113.	Mohit Jain, Jeremy Birnholtz, Ed Cutrell, Ravin Balakrishnan. (2011). Exploring display techniques for mobile collaborative learning in developing regions. Proceedings of MobileHCI 2011. p. 81-90.
	112.	Jian Zhao, Fanny Chevalier, Ravin Balakrishnan. (2011). KronoMiner: Using multi-foci navigation for the visual exploration of time-series data. Proceedings of CHI 2011 – the ACM Conference on Human Factors in Computing Systems. p. 1737-1746. video
	111.	Chun Yu, Yuanchun Shi, Ravin Balakrishnan, Xiangliang Meng, Yue Suo, Mingming Fan, Yongqiang Qin. (2010). The satellite cursor: achieving MAGIC pointing without gaze tracking using multiple cursors. Proceedings of UIST 2010 – the ACM Symposium on User Interface Software and Technology. p. 163-172. video
	110.	Daniel Vogel, Ravin Balakrishnan. (2010). Direct pen interaction with a conventional graphical user interface. Human-Computer Interaction. 1532-7051, Volume 25, Issue 4. p. 324 – 388.
	109.	Jeremy Birnholtz, Abhishek Ranjan, Ravin Balakrishnan. (2010). Providing dynamic visual information for collaborative tasks: Experiments with automatic camera control. Human-Computer Interaction. 1532-7051, Volume 25, Issue 3. p. 261 – 287.
	108.	James Scott, Shahram Izadi, Leila Rezai, Dominika Ruszkowski, Xiaojun Bi, Ravin Balakrishnan. (2010). RearType: Text entry using keys on the back of a device. Proceedings of MobileHCI. p. 171-179.
	107.	Abhishek Ranjan, Jeremy Birnholtz, Rorik Henrikson, Ravin Balakrishnan, Dana Lee. (2010). Automatic camera control using unobtrusive vision and audio tracking. Proceedings of GI 2010 – the Graphics Interface Conference. p. 47-54.
	106.	Daniel Vogel, Ravin Balakrishnan. (2010). Occlusion-aware interfaces. Proceedings of CHI 2010 – the ACM Conference on Human Factors in Computing Systems. p. 263-272. CHI 2010 Best Paper Award video
	105.	Patrick Dubroy, Ravin Balakrishnan. (2010). A study of tabbed browsing among Mozilla Firefox users. Proceedings of CHI 2010 – the ACM Conference on Human Factors in Computing Systems. p. 673-682.
	104.	Xiaojun Bi, Seok-Hyung Bae, Ravin Balakrishnan. (2010). Effects of interior bezels of tiled-monitor large displays on visual search, tunnel steering, and target selection. Proceedings of CHI 2010 – the ACM Conference on Human Factors in Computing Systems. p. 65-74.
	103.	Jennifer Keelan, Vera Pavri, Ravin Balakrishnan, Kumanan Wilson. (2010). An analysis of the Human Papilloma Virus vaccine debate on MySpace blogs. Vaccine, 28(6). p. 1535-1540
	102.	Saleema Amershi, Meredith Ringel Morris, Neema Moraveji, Ravin Balakrishnan, Kentaro Toyama. (2010). Multiple mouse text entry for single-display groupware.  Proceedings of CSCW 2010 – the ACM Conference on Computer Supported Cooperative Work. p. 169-178. CSCW 2010 Best Paper Honorable Mention Award video
	101.	Seok-Hyung Bae, Ravin Balakrishnan, Karan Singh. (2009). EverybodyLovesSketch: 3D sketching for a broader audience. Proceedings of UIST 2009 – the ACM Symposium on User Interface Software and Technology. p. 59-68. video
	100.	Scott Saponas, Desney Tan, Dan Morris, Ravin Balakrishnan, Jim Turner, James Landay. (2009). Enabling always-available input with muscle-computer interfaces. Proceedings of UIST 2009 – the ACM Symposium on User Interface Software and Technology. p. 167-176. video
	99.	Gerry Chu, Tomer Moscovich, Ravin Balakrishnan (2009). Haptic conviction widgets. Proceedings of GI 2009 -- the Graphics Interface Conference. p. 207-210.
	98.	Gursharan Singh, Leah Findlater, Kentaro Toyama, Scott Helmer, Rikin Gandhi, Ravin Balakrishnan. Numeric paper forms for NGOs. (2009). Proceedings of ICTD 2009 – the IEEE/ACM International Conference on Information and Communication Technologies and Development. p. 406-416.
	97.	Gerry Chu, Sambit Satpathy, Kentaro Toyama, Rikin Gandhi, Ravin Balakrishnan. (2009). Featherweight multimedia for information dissemination. Proceedings of ICTD 2009 – the IEEE/ACM International Conference on Information and Communication Technologies and Development. p. 337-347.
	96.	Daniel Vogel, Matthew Cudmore, Gery Casiez, Ravin Balakrishnan, Liam Keliher. (2009). Hand occlusion with tablet-sized direct pen input. Proceedings of CHI 2009 – the ACM Conference on Human Factors in Computing Systems. p. 557-566.
	95.	Xiaojun Bi, Ravin Balakrishnan. (2009). Comparing usage of a large high-resolution display to single or dual desktop displays for daily work. Proceedings of CHI 2009 – the ACM Conference on Human Factors in Computing Systems. p. 1005-1014.
	94.	Clifton Forlines, Ravin Balakrishnan. (2009). Improving visual search with image segmentation. Proceedings of CHI 2009 – the ACM Conference on Human Factors in Computing Systems. p. 1093-1102. CHI 2009 Best Paper Nominee
	93.	Leah Findlater, Ravin Balakrishnan, Kentaro Toyama. (2009). Comparing semiliterate and illiterate users' ability to transition from audio+text to text-only interaction. Proceedings of CHI 2009 – the ACM Conference on Human Factors in Computing Systems. p. 1751-1760.
	92.	Ken Hinckley, Morgan Dixon, Raman Sarin, Francois Guimbretiere, Ravin Balakrishnan. (2009). Codex: A dual screen computer. Proceedings of CHI 2009 – the ACM Conference on Human Factors in Computing Systems. p. 1933-1942. video
	91.	Neema Moraveji, Kori Inkpen, Ed Cutrell, Ravin Balakrishnan. (2009). A mischief of mice: Examining children’s performance in single display groupware systems with 1 to 32 mice. Proceedings of CHI 2009 – the ACM Conference on Human Factors in Computing Systems. p. 2157-2166.
	90.	Xiang Cao, Michael Massimi, Ravin Balakrishnan. (2008). Flashlight Jigsaw: An exploratory study of an ad-hoc multi-player game on public displays. To appear in the Proceedings of CSCW 2008 – the ACM Conference on Computer Supported Cooperative Work. p. 77-86
	89.	Hrvoje Benko, Andrew Wilson, Ravin Balakrishnan. (2008). Sphere: Multi-touch interactions on a spherical display. Proceedings of UIST 2008 – the ACM Symposium on User Interface Software and Technology. p. 77-86. video
	88.	Xiaojun Bi, Tomer Moscovich, Gonzalo Ramos, Ravin Balakrishnan, Ken Hinckley. (2008). An exploration of pen rolling for pen-based interaction. Proceedings of UIST 2008 – the ACM Symposium on User Interface Software and Technology. p. 191-200. video
	87.	Seok-Hyung Bae, Ravin Balakrishnan, Karan Singh. (2008). ILoveSketch: As-natural-as-possible sketching system for creating 3D curve models. Proceedings of UIST 2008 – the ACM Symposium on User Interface Software and Technology. p. 151-160. video
	86.	Xiang Cao, Andrew Wilson, Ravin Balakrishnan, Ken Hinckley, Scott E. Hudson. (2008). ShapeTouch: Leveraging contact shape on interactive surfaces. Proceedings of TABLETOP 2008 – the IEEE International Workshop on Horizontal Interactive Human Computer Systems. p. 139-146. video
	85.	Archana Prasad, Indrani Medhi, Kentaro Toyama, Ravin Balakrishnan. (2008). Exploring the feasibility of video mail for illiterate users. Proceedings of AVI 2008 - the Conference on Advanced Visual Interfaces. p. 103-110.
	84.	Ryan Schmidt, Karan Singh, Ravin Balakrishnan. (2008). Sketching and composing widgets for 3D manipulation. Computer Graphics Forum, 27(2) -- Proceedings of Eurographics Conference. p. 301-310. video
	83.	Scott Saponas, Desney Tan, Dan Morris, Ravin Balakrishnan. (2008). Demonstrating the feasibility of using forearm electromyography for muscle-computer interfaces. Proceedings of CHI 2008 – the ACM Conference on Human Factors in Computing Systems. p. 515-524.
	82.	Xiang Cao, Jacky Jie Li, Ravin Balakrishnan. (2008). Peephole pointing: Modeling acquisition of dynamically revealed targets. Proceedings of CHI 2008 – the ACM Conference on Human Factors in Computing Systems. p. 1699-1708. CHI 2008 Best Paper Nominee
	81.	Tovi Grossman, Ravin Balakrishnan. (2008). Collaborative interaction with volumetric displays. Proceedings of CHI 2008 – the ACM Conference on Human Factors in Computing Systems. p. 383-392. video
	80.	Clifton Forlines, Ravin Balakrishnan. (2008). Evaluating tactile feedback and direct vs. indirect stylus input in pointing and crossing selection tasks. Proceedings of CHI 2008 – the ACM Conference on Human Factors in Computing Systems. p. 1563-1572.
	79.	Abhishek Ranjan, Jeremy Birnholtz, Ravin Balakrishnan. (2008). Improving meeting capture by applying television production principles with audio and motion detection. Proceedings of CHI 2008 – the ACM Conference on Human Factors in Computing Systems. p. 227-238. video
	78.	Pierre Dragicevic, Gonzalo Ramos, Jacobo Bibliowicz, Derek Nowrouzezahrai, Ravin Balakrishnan, Karan Singh. (2008). Video browsing by direct manipulation. Proceedings of CHI 2008 – the ACM Conference on Human Factors in Computing Systems. p. 237-246. short "teaser" video longer video
	77.	Géry Casiez, Daniel Vogel, Ravin Balakrishnan, Andy Cockburn. (2008). The impact of control-display gain on user performance in pointing tasks. Human Computer Interaction, 23(3). p. 215-250.
	76.	Xiang Cao, Clifton Forlines, Ravin Balakrishnan. (2007). Multi-user interaction using handheld projectors. Proceedings of UIST 2007 – the ACM Symposium on User Interface Software and Technology. p. 43-52. video
	75.	Shengdong Zhao, Pierre Dragicevic, Mark Chignell, Ravin Balakrishnan, Patrick Baudisch. (2007). earPod: Eyes-free menu selection using touch input and reactive audio feedback. Proceedings of CHI 2007 – the ACM Conference on Human Factors in Computing Systems. p. 1395-1404. video Selected press coverage (local cache): MIT Technology Review, May 2007.
	74.	Clifton Forlines, Chia Shen, Daniel Wigdor, Ravin Balakrishnan. (2007). Direct-touch vs. mouse input for tabletop displays. Proceedings of CHI 2007 – the ACM Conference on Human Factors in Computing Systems. p. 647-656.
	73.	Gonzalo Ramos, Ravin Balakrishnan. (2007). Pressure marks. Proceedings of CHI 2007 – the ACM Conference on Human Factors in Computing Systems. p. 1375-1384. video
	72.	Gonzalo Ramos, Andy Cockburn, Ravin Balakrishnan, Michel Beaudoiun-Lafon. (2007). Pointing lenses: facilitating stylus input through visual-and motor-space magnification. Proceedings of CHI 2007 – the ACM Conference on Human Factors in Computing Systems. p. 757-766. video
	71.	Abhishek Ranjan, Jeremy Birnholtz, Ravin Balakrishnan. (2007). Dynamic shared visual spaces: Experimenting with automatic camera control in a remote repair task. Proceedings of CHI 2007 – the ACM Conference on Human Factors in Computing Systems. p. 1177-1186.
	70.	Daniel Wigdor, Chia Shen, Clifton Forlines, Ravin Balakrishnan. (2007). Perception of elementary graphical elements in tabletop and multi-surface environments. Proceedings of CHI 2007 – the ACM Conference on Human Factors in Computing Systems. p. 473-482.
	69.	Jeremy Birnholtz, Tovi Grossman, Clarissa Mak, Ravin Balakrishnan. (2007). An exploratory study of input configuration and group process in a negotiation task using a large display. Proceedings of CHI 2007 – the ACM Conference on Human Factors in Computing Systems. p. 91-100
	68.	Tovi Grossman, Nicholas Kong, Ravin Balakrishnan. (2007). Modeling pointing at targets of arbitrary shapes. Proceedings of CHI 2007 – the ACM Conference on Human Factors in Computing Systems. p. 463-472.
	67.	Tovi Grossman, Daniel Wigdor, Ravin Balakrishnan. (2007). Exploring and reducing the effects of orientation on text readability in volumetric displays. Proceedings of CHI 2007 – the ACM Conference on Human Factors in Computing Systems. p. 483-492.
	66.	Tovi Grossman, Pierre Dragicevic, Ravin Balakrishnan. (2007). Strategies for accelerating on-line learning of hotkeys. Proceedings of CHI 2007 – the ACM Conference on Human Factors in Computing Systems. p. 1591-1600.
	65.	Jia Sheng, Ravin Balakrishnan, Karan Singh. (2006). An interface for 3D sculpting via physical proxy. Proceedings of GRAPHITE 2006 – International Conference on Computer Graphics and Interactive Techniques in Australasia and Southeast Asia. p. 213-220. video
	64.	Abhishek Ranjan, Jeremy Birnholtz, Ravin Balakrishnan. (2006). An exploratory analysis of partner action and camera control in a video-mediated collaborative task. Proceedings of CSCW 2006 – the ACM Conference on Computer Supported Cooperative Work. p. 403-412. CSCW 2006 Best Paper Honorable Mention Award
	63.	Clifton Forlines, Chia Shen, Daniel Wigdor, Ravin Balakrishnan. (2006). Exploring the effects of group size and display configuration on visual search. Proceedings of CSCW 2006 – the ACM Conference on Computer Supported Cooperative Work. p. 11-20.
	62.	Xiang Cao, Ravin Balakrishnan. (2006). Interacting with dynamically defined information spaces using a handheld projector and a pen. Proceedings of UIST 2006 – the ACM Symposium on User Interface Software and Technology. p. 225-234. video presentation at UIST 2006
	61.	Daniel Wigdor, Darren Leigh, Clifton Forlines, Samuel Shipman, John Barnwell, Ravin Balakrishnan, Chia Shen. (2006). Under the table interaction. Proceedings of UIST 2006 – the ACM Symposium on User Interface Software and Technology. p. 259-268 video presentation at UIST 2006
	60.	Anastasia Bezerianos, Pierre Dragicevic, Ravin Balakrishnan. (2006). Mnemonic rendering: An image-based approach for exposing hidden changes in dynamic displays. Proceedings of UIST 2006 – the ACM Symposium on User Interface Software and Technology. p. 159-168. UIST 2006 Best Student Paper Award One of 3 papers invited to a UIST reprise session at ACM SIGGRAPH 2007 video presentation at UIST 2006
	59.	Tovi Grossman, Ravin Balakrishnan. (2006). The design and evaluation of selection techniques for 3d volumetric displays. Proceedings of UIST 2006 – the ACM Symposium on User Interface Software and Technology. p. 3-12. video presentation at UIST 2006
	58.	Clifton Forlines, Daniel Vogel, Ravin Balakrishnan. (2006). HybridPointing: Fluid switching between absolute and relative pointing with a direct input device. Proceedings of UIST 2006 – the ACM Symposium on User Interface Software and Technology. p. 211-220. video presentation at UIST 2006
	57.	Tovi Grossman, Ravin Balakrishnan. (2006). An evaluation of depth perception on volumetric displays. Proceedings of AVI 2006 - the Conference on Advanced Visual Interfaces. p. 193-200.
	56.	Daniel Wigdor, Chia Shen, Clifton Forlines, Ravin Balakrishnan. (2006). Table-centric interactive spaces for real-time collaboration. Proceedings of AVI 2006 – the Conference on Advanced Visual Interfaces. p. 103-107. poster video
	55.	Anand Agarawala, Ravin Balakrishnan. (2006). Keepin' it real: Pushing the desktop metaphor with physics, piles and the pen. Proceedings of CHI 2006 - the ACM Conference on Human Factors in Computing Systems. p. 1283-1292. video. This was the most viewed science & technology video on YouTube, ever (with over 3.3M views as of May 2009). 20 second "CHI Madness" hip-hop summary video Selected press coverage (local cache): CBC, June 2006, Digital Image Fest, June 2006  (video) Anand's TED Talk This work is was productized as BumpTop. The company was acquired by Google in 2010.
	54.	Daniel Wigdor, Chia Shen, Clifton Forlines, Ravin Balakrishnan. (2006). Effects of display position and control space orientation on user preference and performance. Proceedings of CHI 2006 - the ACM Conference on Human Factors in Computing Systems. p. 309-318.
	53.	Tovi Grossman, Ken Hinckley, Patrick Baudisch, Maneesh Agrawala, Ravin Balakrishnan. (2006). Hover widgets: Using the tracking state to extend the capabilities of pen-operated devices. Proceedings of CHI 2006 - the ACM Conference on Human Factors in Computing Systems. p. 861-870. video
	52.	Abhishek Ranjan, Ravin Balakrishnan, Mark Chignell. (2006). Searching in audio: The utility of transcripts, dichotic presentation, and time-compression. Proceedings of CHI 2006 - the ACM Conference on Human Factors in Computing Systems. p. 721-730.
	51.	Michael Wu, Chia Shen, Kathy Ryall, Clifton Forlines, Ravin Balakrishnan. (2006). Gesture registration, relaxation, and reuse for multi-point direct-touch surfaces. Proceedings of TableTop 2006 - the IEEE International Workshop on Horizontal Interactive Human Computer Systems. p. 183.190. video
	50.	Daniel Vogel, Ravin Balakrishnan. (2005). Distant freehand pointing and clicking on very large high resolution displays. Proceedings of UIST 2005 - the ACM Symposium on User Interface Software and Technology. p. 33-42. video
	49.	Shahzad Malik, Abhishek Ranjan, Ravin Balakrishnan. (2005). Interacting with large displays from a distance with vision-tracked multi-finger gestural input. Proceedings of UIST 2005 - the ACM Symposium on User Interface Software and Technology. p. 43-52. One of 3 papers invited to a UIST reprise session at ACM SIGGRAPH 2006 video
	48.	Gonzalo Ramos, Ravin Balakrishnan. (2005). Zliding: Fluid zooming and sliding for high precision parameter manipulation. Proceedings of UIST 2005 - the ACM Symposium on User Interface Software and Technology. p. 143-152. video
	47.	Clifton Forlines, Ravin Balakrishnan, Paul Beardsley, Jeroen van Baar, Ramesh Raskar. (2005). Zoom-and-Pick: Facilitating visual zooming and precision pointing with interactive handheld projectors. Proceedings of UIST 2005 - the ACM Symposium on User Interface Software and Technology. p. 73-82. video
	46.	Michael McGuffin, Ravin Balakrishnan. (2005). Interactive visualization of genealogical graphs. Proceedings of InfoVis 2005 – the IEEE Symposium on Information Visualization. p. 17-24. video
	45.	Theophanis Tsandilas, Ravin Balakrishnan. (2005). An evaluation of techniques for reducing spatial interference in single display groupware. Proceedings of ECSCW 2005 - the European Conference on Computer Supported Cooperative Work. p. 221-240.
	44.	Daniel Wigdor, Ravin Balakrishnan. (2005). Empirical investigation into the effect of orientation on text readability in tabletop displays. Proceedings of ECSCW 2005 - the European Conference on Computer Supported Cooperative Work. p. 205-224.
	43.	Anastasia Bezerianos, Ravin Balakrishan. (2005). Canvas Portals: View and space management on large displays. IEEE Computer Graphics and Applications, 25(4). p. 34-43
	42.	Michael McGuffin, Ravin Balakrishnan. (2005). Fitts' law and expanding targets: Experimental studies and designs for user interfaces. ACM Transactions on Computer-Human Interaction, 12(4). p. 388-422.
	41.	Xiang Cao, Ravin Balakrishnan. (2005). Evaluation of an online adaptive gesture interface with command prediction. Proceedings of GI 2005 – the Graphics Interface Conference. p. 187-194. GI 2005 Best Student Paper Award
	40.	Tovi Grossman, Ravin Balakrishnan. (2005). The Bubble Cursor: Enhancing target acquisition by dynamic resizing of the cursor’s activation area. Proceedings of CHI 2005 – the ACM Conference on Human Factors in Computing Systems. p. 281-290. CHI 2005 Best Paper Award video
	39.	Anastasia Bezerianos, Ravin Balakrishnan. (2005). The Vacuum: Facilitating the manipulation of distant objects. Proceedings of CHI 2005 – the ACM Conference on Human Factors in Computing Systems. p. 361-370. video
	38.	Tovi Grossman, Ravin Balakrishnan. (2005). A probabilistic approach to modeling two-dimensional pointing. ACM Transactions on Computer-Human Interaction,12(3). p. 435-459. online appendix
	37.	Ravin Balakrishnan. (2004). "Beating" Fitts' law: Virtual enhancements for pointing facilitation. International Journal of Human-Computer Studies, 61(6). p. 857-874.
	36.	Tovi Grossman, Daniel Wigdor, Ravin Balakrishnan. (2004). Multi-finger gestural interaction with 3-D volumetric displays. Proceedings of UIST 2004 – the ACM Symposium on User Interface Software and Technology. p. 61-70. UIST 2004 Best Paper Award One of 3 papers invited to a UIST reprise session at ACM SIGGRAPH 2005 video Selected press coverage (local cache): MIT Tech Review, Feb 2005, Toronto Star, 20 Jan 2003
	35.	Daniel Vogel, Ravin Balakrishnan. (2004). Interactive public ambient displays: transitioning from implicit to explicit, public to personal, interaction with multiple users. Proceedings of UIST 2004 – the ACM Symposium on User Interface Software and Technology. p. 137-146. video
	34.	Shengdong Zhao, Ravin Balakrishnan. (2004). Simple vs. compound mark hierarchical marking menus. Proceedings of UIST 2004 – the ACM Symposium on User Interface Software and Technology. p. 33-42. video
	33.	Karan Singh, Ravin Balakrishnan. (2004). Visualizing 3D scenes using non-linear projections and data mining of previous camera movements. Proceedings of Afrigraph 2004 – the ACM African Graphics Conference. p. 41-48. video
	32.	Michael McGuffin, Gord Davison, Ravin Balakrishnan. (2004). Expand-ahead: A space-filling strategy for browsing trees. Proceedings of InfoVis 2004 – the IEEE Symposium on Information Visualization. p. 119-126. video
	31.	Wael Aboelsaadat, Ravin Balakrishnan. (2004). An empirical comparison of transparency on one and two layer displays. Proceedings of HCI 2004 – the British HCI Conference. p. 53-67.
	30.	Michael Tsang, Nigel Morris, Ravin Balakrishnan. (2004). Temporal thumbnails: rapid visualization of time-based viewing data. Proceedings of AVI 2004 – the Conference on Advanced Visual Interfaces. p. 175-178. longer (8 pages) unpublished version of the paper
	29.	Steven Tsang, Ravin Balakrishnan, Karan Singh, Abhishek Ranjan. (2004). A suggestive interface for image guided 3D sketching. Proceedings of CHI 2004 – the ACM Conference on Human Factors in Computing Systems. p. 591-598. video
	28.	Gonzalo Ramos, Matthew Boulos, Ravin Balakrishnan. (2004). Pressure widgets. Proceedings of CHI 2004 – the ACM Conference on Human Factors in Computing Systems. p. 487-494. Selected press coverage (local cache): MIT Tech Review, June 2004
	27.	Tovi Grossman, Ravin Balakrishnan. (2004). Pointing at trivariate targets in 3D environments. Proceedings of CHI 2004 – the ACM Conference on Human Factors in Computing Systems. p. 447-454.
	26.	Daniel Wigdor, Ravin Balakrishnan. (2004). A comparison of consecutive and concurrent input text entry techniques for mobile phones. Proceedings of CHI 2004 – the ACM Conference on Human Factors in Computing Systems. p. 81-88.
	25.	Michael Wu, Ravin Balakrishnan. (2003). Multi-finger and whole hand gestural interaction techniques for multi-user tabletop displays. Proceedings of UIST 2003 – the ACM Symposium on User Interface Software and Technology. p. 193-202. video
	24.	Daniel Wigdor, Ravin Balakrishnan. (2003). TiltText: Using tilt for text input to mobile phones. Proceedings of UIST 2003 – ACM Symposium on User Interface Software and Technology. p. 81-90. Selected press coverage (local cache): MIT Tech Review, Nov 2003
	23.	Gonzalo Ramos, Ravin Balakrishnan. (2003). Fluid interaction techniques for the control and annotation of digital video. Proceedings of UIST 2003 – the ACM Symposium on User Interface Software and Technology. p. 105-114. video Selected press coverage (local cache): Varsity, 4 Nov 2002
	22.	Xiang Cao, Ravin Balakrishnan. (2003). VisionWand: Interaction techniques for large displays using a passive wand tracked in 3D. Proceedings of UIST 2003 – the ACM Symposium on User Interface Software and Technology. p. 173-182. One of 3 papers invited to a "Best of UIST" reprise session at ACM SIGGRAPH 2004 video
	21.	Michael McGuffin, Liviu Tancau, Ravin Balakrishnan. (2003). Using deformations for browsing volumetric data. Proceedings of Vis 2003 – the IEEE Visualization Conference. p. 401-408. 4min video demonstrating key aspects of the research complete 8min video demonstrating all the techniques developed in the research
	20.	George W. Fitzmaurice, Azam Khan, William Buxton, Gordon Kurtenbach, Ravin Balakrishnan. (2003). Sentient data access via a diverse society of devices. ACM Queue, November 2003. p. 53-62.
	19.	Tovi Grossman, Ravin Balakrishnan, Karan Singh. (2003). An interface for creating and manipulating curves using a high degree-of-freedom input device. Proceedings of CHI 2003 – the ACM Conference on Human Factors in Computing Systems. p. 185-192. 3min video demonstrating basic aspects of the research system complete 15min video demonstrating the entire research system Selected press coverage (local cache): UofT News 14 Apr 2003, NewsFactor 21 Apr 2003, Varsity, 24 Sep 2002 interview/demo on Discovery Channel's Daily Planet interview/demo on CityPulse24
	18.	Nicholas Burtnyk, Azam Khan, George W. Fitzmaurice, Ravin Balakrishnan, Gordon Kurtenbach. (2002). StyleCam: Interactive stylized 3D navigation using integrated spatial and temporal controls. Proceedings of UIST 2002 – the ACM Symposium on User Interface Software and Technology. p. 101-110. video
	17.	Michael McGuffin, Ravin Balakrishnan. (2002). Acquisition of expanding targets. Proceedings of CHI 2002 – the ACM Conference on Human Factors in Computing Systems. p. 57-64. demo of prototypes (java applets)
	16.	Tovi Grossman, Ravin Balakrishnan, Gordon Kurtenbach, George W. Fitzmaurice, Azam Khan, William Buxton. (2002). Creating principal 3D curves with digital tape drawing. Proceedings of CHI 2002 – the ACM Conference on Human Factors in Computing Systems. p. 121-128. video
	15.	Tovi Grossman, Ravin Balakrishnan, Gordon Kurtenbach, George W. Fitzmaurice, Azam Khan, William Buxton. (2001). Interaction techniques for 3D modeling on large displays. Proceedings of I3D 2001 – the ACM Symposium on Interactive 3D Graphics. p. 17-23. video additional video
	14.	Ravin Balakrishnan, George W. Fitzmaurice, Gordon Kurtenbach. (2001). User interfaces for volumetric displays. IEEE Computer, March 2001. p. 37-45. video
	13.	William Buxton, George W. Fitzmaurice, Ravin Balakrishnan, Gordon Kurtenbach. (2000). Large displays in automotive design. IEEE Computer Graphics and Applications, 2(4). p. 68-75.
	12.	Ravin Balakrishnan, Ken Hinckley. (2000). Symmetric bimanual interaction. Proceedings of CHI 2000 – the ACM Conference on Human Factors in Computing Systems. p. 33-40.
	11.	George W. Fitzmaurice, Ravin Balakrishnan, Gordon Kurtenbach. (1999). Sampling, synthesis, and input devices. Communications of the ACM, August 1999, 42(8). p. 54-63.
	10.	Ravin Balakrishnan, Ken Hinckley. (1999). The role of kinesthetic reference frames in two-handed input performance. Proceedings of UIST 1999 – the ACM Symposium on User Interface Software and Technology. p. 171-178.
	9.	Ravin Balakrishnan, George W. Fitzmaurice, Gordon Kurtenbach, William Buxton. (1999). Digital tape drawing. Proceedings of UIST 1999 – the ACM Symposium on User Interface Software and Technology. p. 161-169. video additional video
	8.	Ravin Balakrishnan, Gordon Kurtenbach. (1999). Exploring bimanual camera control and object manipulation in 3D graphics interfaces. Proceedings of CHI 1999 – the ACM Conference on Human Factors in Computing Systems. p. 53-63. video demonstrating an example bimanual camera control and painting/sculpting interface (Azam Khan, Gordon Kurtenbach, Ravin Balakrishnan, Bill Buxton) additional video (Azam Khan, Gordon Kurtenbach, Ravin Balakrishnan, Bill Buxton)
	7.	George W. Fitzmaurice, Ravin Balakrishnan, Gordon Kurtenbach, William Buxton. (1999). An exploration into supporting artwork orientation in the user interface. Proceedings of CHI 1999 – the ACM Conference on Human Factors in Computing Systems. p. 167-174.
	6.	Ravin Balakrishnan, George W. Fitzmaurice, Gordon Kurtenbach, Karan Singh. (1999). Exploring interactive curve and surface manipulation using a bend and twist sensitive input strip. Proceedings of I3D 1999 – the ACM Symposium on Interactive 3D Graphics. p. 111-118. color plate images video additional video
	5.	Ravin Balakrishnan, Pranay Patel. (1998). The PadMouse: Facilitating selection and spatial positioning for the non-dominant hand. Proceedings of CHI 1998 – the ACM Conference on Human Factors in Computing Systems. p. 9-16.
	4.	Ravin Balakrishnan, Thomas Baudel, Gordon Kurtenbach, George W. Fitzmaurice. (1997). The Rockin'Mouse: Integral 3D manipulation on a plane. Proceedings of CHI 1997 – the ACM Conference on Human Factors in Computing Systems. p. 311-318. video
	3.	Ravin Balakrishnan, I. Scott MacKenzie. (1997). Performance differences in the fingers, wrist, and forearm in computer input control. Proceedings of CHI 1997 – the ACM Conference on Human Factors in Computing Systems. p. 303-310.
	2.	Colin Ware, Ravin Balakrishnan. (1994). Target acquisition in fishtank VR: The effects of lag and frame rate. Proceedings of GI 1994 – the Graphics Interface Conference. p. 1-7.
	1.	Colin Ware, Ravin Balakrishnan. (1994). Reaching for objects in VR displays: Lag and frame rate. ACM Transactions on Computer-Human Interaction, 1(4). p. 331-356.

Conference abstracts, posters, technical reports, theses, and other tree wasters.

Jeremy Birnholtz, Abhishek Ranjan, Ravin Balakrishnan. (2008). Error and coupling: Extending common ground to improve the provision of visual information for collaborative tasks. Conference of the International Communication Association, Montreal, Canada, May 22-26, 2008.

Jeremy Birnholtz, Abhishek Ranjan, Ravin Balakrishnan. (2007). Using motion tracking data to augment video recordings in experimental social science research. Proceedings of the Third International Conference on e-Social Science.

Igor Mordatch, Patrick Coleman, Karan Singh, Ravin Balakrishnan. (2007). Interface techinques for 3D control of spatial keyframing. Poster in ACM SIGGRAPH Conference.

Daniel Wigdor, Chia Shen, Clifton Forlines, Ravin Balakrishnan. (2006). Table-centric interactive spaces for real-time collaboration: a video demonstration. Video Proceedings of CSCW 2006 – the ACM Conference on Computer Supported Cooperative Work.

Daniel Wigdor, Chia Shen, Clifton Forlines, Ravin Balakrishnan. (2006). Table-centric interactive spaces for real-time collaboration: Solutions, evaluation, and application scenarios. Proceedings of CollabTech 2006.

Gonzalo Ramos, Ravin Balakrishnan. (2004). Visual features and interference in pressure widgets. Technical Report, DGP Lab, University of Toronto, DGP-TR-2004-003.

Anastasia Bezerianos, Ravin Balakrishnan. (2004). Interaction and visualization techniques for very large scale high resolution displays. Technical Report, DGP Lab, University of Toronto, DGP-TR-2004-002.
video

Ravin Balakrishnan. (2001). Issues in bimanual interaction for computer graphics. Ph.D. Thesis. Department of Computer Science, University of Toronto.

Ravin Balakrishnan. (1997). The evolution and evaluation of a 3D input device. M.Sc. Thesis. Department of Computer Science, University of Toronto.

Ravin Balakrishnan, Colin Ware, Tim Smith. (1994). Virtual handtool with force-feedback. Extended Abstracts of CHI 1994 – the ACM Conference on Human Factors in Computing Systems. p. 83-84.

Ravin Balakrishnan, Przemyslaw Pochec. (1992). A testbed for surface orientation detection algorithms. APICS Computer Science Conference. Halifax, N.S.

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Courses

Current courses:

none

Courses I've taught in the past:

CSC2604, “Topics in Human Centered and Interdisciplinary Computing”, Fall 2013 (Grad).

CSC2524, “Topics in Interactive Computing”, Winter 2013 (Grad).

CSC2524, "Topics in Interactive Computing", Fall 2010 (Grad)

CSC490 "Capstone Design Course", Fall 2006 (Undergrad)

CSC2524, "Topics in Interactive Computing", Fall 2006 (Grad)

CSC490 "Capstone Design Course", Sep 2005 - Apr 2006 (Undergrad)

CSC2524, "Topics in Interactive Computing", Spring 2006 (Grad)

CSC490 "Capstone Design Course", Sep 2004 - Apr 2005 (Undergrad)

CSC428/CSC2514, "Human Computer Interaction", Fall 2004 (Crosslisted Grad/Undergrad)

CSC2524, "Topics in Interactive Computing", Fall 2004 (Grad)

"Capstone Design Course", Sep 2003 - Apr 2004 (Undergrad)

CSC428/CSC2514, "Human Computer Interaction", Fall 2003 (Crosslisted Grad/Undergrad)

CSC2524, "Topics in Interactive Computing", Fall 2003 (Grad)

CSC428/CSC2514, "Human Computer Interaction", Fall 2002 (Crosslisted Grad/Undergrad)

CSC2524, "Topics in Interactive Computing", Fall 2002 (Grad)

CSC318, "The Design of Interactive Computational Media", Spring 2002 (Undergrad)

CSC428/CSC2514, "Human Computer Interaction", Fall 2001 (Crosslisted Grad/Undergrad)

CSC258, "Computer Organization", Summer 2000 (Undergrad)

CSC258, "Computer Organization", Spring 2000 (Undergrad)

CSC258, "Computer Organization", Fall 1999 (Undergrad)

CSC108, "Introduction to Computer Programming", Summer 1999 (Undergrad)

CSC258, "Computer Organization", Spring 1999 (Undergrad)

CSC340, "Information Systems Analysis and Design", Fall 1998 (Undergrad)

CSC258, "Computer Organization", Summer 1998 (Undergrad)

CSC340, "Information Systems Analysis and Design", Fall 1997 (Undergrad)

CSC104, "The How and Why of Computing", Spring 1997 (Undergrad)

CSC258, "Computer Organization", Summer 1995 (Undergrad)

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Students & Postdoctoral Fellows

Current graduate students:

Aakar Gupta Ph.D.

Rorik Henrikson Ph.D.

Sajad Shirali-Shahreza. Ph.D. co-advised with Yashar Ganjali.

Alumni

Fanny Chevalier. Postdoctoral fellow, Jan 2012 – Nov 2013. co-advised with Karan Singh and Sara Diamond.

Thomas Pietrzak. Postdoctoral fellow, Jan 2011 - Sep 2011

William Soukoreff. Postdoctoral fellow, May 2010 - Nov 2011.

Seok-Hyung Bae. Postdoctoral fellow, Sep 2007 - Feb 2010. co-advised with Karan Singh.

Tomer Moscovich Postdoctoral fellow, Feb 2007-June 2008

Jeremy Birnholtz Postdoctoral fellow, Aug 2005-July 2007. co-advised with colleagues in NECTAR.

Pierre Dragicevic Postdoctoral fellow, Feb 2006-Apr 2007.

Géry Casiez Postdoctoral fellow, Feb-Aug 2005.

Jian Zhao Ph.D. Jun 2015

Dustin Freeman Ph.D. May 2015

Xiaojun Bi Ph.D. Jun 2011.

Daniel Vogel Ph.D. Apr 2010.

Clifton Forlines Ph.D. Nov 2008.

Abhishek Ranjan Ph.D. Oct 2008.

Xiang Cao Ph.D. Oct 2008.

Tovi Grossman Ph.D. Apr 2008.

Daniel Wigdor Ph.D. Apr 2008.

Gonzalo Ramos Ph.D. Jan 2008.

Anastasia Bezerianos Ph.D. Sep 2007.

Michael McGuffin Ph.D. May 2007.

Rinat Abdrashitov. M.Sc. Jan 2015. co-advised with Karan Singh.

Jonathan Deber M.Sc. May, 2013.

Stephanie Santosa M.Sc. May 2013. co-advised with Karan Singh.

Aakar Gupta M.Sc. Jan 2012.

Rorik Henrikson M.Sc. Jan 2012.

Navkar Samdaria M.Sc. Jan 2012.

Mohit Jain M.Sc. Jan 2011.

Akhil Mathur M.Sc. Jan 2011.

Dominika Ruszkowski M.Sc. Aug 2010.

Dustin Freeman M.Sc. Aug 2010.

Patrick Dubroy M.Sc. May 2009.

Azam Khan M.Sc. Sep 2008.

Michael Jurka M.Sc. Jan 2008.

Gerry Chu M.Sc. Dec 2007.

Tristan Campbell M.Sc. Oct 2006.

Steven Tsang M.Sc. Aug 2006. co-advised with Karan Singh

Anand Agarawala M.Sc. Jan 2006.

Abhishek Ranjan M.Sc. Jan 2005.

Jia Sheng M.Sc. Jan 2005. co-advised with Karan Singh

Daniel Vogel M.Sc. Jan 2005

Wael Aboelsaadat M.Sc. Jan 2004.

Xiang Cao M.Sc. Jan 2004. co-advised with Allan Jepson

Tovi Grossman M.Sc. Jan 2004.
Daniel Wigdor M.Sc. Jan 2004.

Yan (Grace) Wang M.Sc. Dec 2003.

Michael McGuffin  M.Sc. Aug 2002. co-advised with Gordon Kurtenbach

Sameer Vohra. Undergraduate research assistant, summer 2007 (NSERC USRA). co-advised with Tomer Moscovich

Curren Pangler. Undergraduate research assistant, summer 2007 (NSERC USRA). co-advised with Tomer Moscovich

Nicholas Kong. Undergraduate research assistant, summer 2005, summer 2006 (NSERC USRA), summer 2007 (NSERC USRA). co-advised with Tovi Grossman

Matthew Boulos. Undergraduate research assistant, summer 2003 (NSERC USRA), summer 2004 (NSERC USRA). co-advised with Gonzalo Ramos

Vikas Jain. Undergraduate research assistant, summer 2003. co-advised with Tovi Grossman

Jeffrey Magder. Undergraduate research assistant, summer 2002 (NSERC USRA)

Abhishek Ranjan. Undergraduate research assistant, summer 2002

Tovi Grossman. Undergraduate research assistant, summer 2000, summer 2001, summer 2002 (NSERC USRA)

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Brief Biography

Ravin Balakrishnan is a Professor at the Department of Computer Science, University of Toronto where he co-directs the Dynamic Graphics Project (DGP) laboratory, and is currently serving as the department’s chair. His research interests are in Human Computer Interaction (HCI), Information and Communications Technology for Development, and Interactive Computer Graphics. He earned his Ph.D. in Computer Science from the University of Toronto, working with Bill Buxton, while concurrently a part-time researcher at Alias|wavefront (now part of Autodesk). He was elected to the ACM CHI Academy in 2011, is the recipient of an Alfred P. Sloan Research Fellowship (2007), an Ontario Premier's Research Excellence Award (2003), the Bell University Laboratories Associate Chair in HCI at the University of Toronto (2002-2006), a Canada Research Chair (2006-2016) and multiple best paper type awards at the top conferences in his field (ACM CHI, CSCW, UIST). In addition to working with students and colleagues at Toronto, he collaborates with researchers at leading industrial laboratories and universities worldwide, including stints as a visiting researcher at Mitsubishi Electric Research Laboratories (MERL) (2005-2007), a visiting professor at the University of Paris & INRIA (2006), and a visiting researcher at Microsoft Research's Redmond, Beijing, Bangalore and Cambridge labs while on sabbatical from the University of Toronto during the 2007-2008 academic year. He was a co-founder of Bump Technologies Inc., which was acquired by Google in 2010, and is involved in two other startups that are commercializing research conducted in his lab: Arcestra & Conceptualiz. He has also consulted for various leading companies as an expert witness in patent infringement matters in multiple countries. Further information, including publications and videos demonstrating some of his research, can be obtained from www.dgp.toronto.edu/~ravin

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Professional Activities

Journal, conference and workshop organization

ACM Transactions on Computer-Human Interaction. Associate Editor, 2010-present.

IEEE Transactions on Visualization and Computer Graphics. Associate Editor, 2008-2011.

ACM UIST 2009 Symposium on User Interface Software and Technology. Sponsorship Chair

IEEE 3D User Interfaces 2009. Conference Co-Chair

ACM UIST 2008 Symposium on User Interface Software and Technology. Sponsorship Co-Chair

Human-Computer Interaction journal. Co-guest editor of Special Issue on Ubiquitous Multi Display Environments, Volune 24, Issues 1 & 2, 2009. (Guest Editors' Introduction)

ACM UIST 2007 Symposium on User Interface Software and Technology. Program Chair & Sponsorship Co-Chair

Ubicomp 2005 Workshop on "The Spaces in-between: Seamful vs. Seamless Interactions". Co-organizer.

Graphics Interface 2004 Conference. Conference and Program Co-Chair

Graphics Interface 2002 Conference. Posters and Demonstrations Chair

International Input Research Workshop, 2000, Ribeaucourt, France. Organizing Committee.

Conference and workshop program committees

ACM CHI Conference on Human Factors in Computing Systems, Associate Chair for Papers (2002, 2003, 2004, 2005, 2006, 2009, 2010, 2011, 2014, 2015)

ACM CHI Conference on Human Factors in Computing Systems, Short Papers Program Committee (2001)

ACM UIST Symposium on User Interface Software and Technology, Papers Program Committee (2003, 2004, 2005, 2006, 2010, 2015)

ACM SIGGRAPH Conference on Computer Graphics and Interactive Techniques (2010)

International Projector-Camera Systems Workshop (PROCAMS), Program Committee (2008, 2009).

ACM SIGGRAPH International Conference on Virtual-Reality Continuum and its Applications in Industry (VRCAI), Program Committee (2008).
International Conference on Intelligent User Interfaces (IUI), Workshop on Intelligent User Interfaces for Developing Regions, Program Committee (2008).

Graphics Interface Conference, Papers Program Committee (2002)

ACM VRST Symposium on Virtual Reality Software and Technology, Papers Program Committee (2003)

IEEE InfoVis Symposium on Information Visualization, Papers Program Committee (2006)

ACM I3D Symposium on Interactive 3D Graphics and Games, Papers Program Committee (2006)

NordiCHI Conference, Papers Program Committee (2004)

8th Eurographics Workshop on Virtual Environments, Barcelona, Spain, Papers Program Committee (2002)

Meetings, seminars, etc.

Seminars on research and related skills for grad students (Jan-Apr 2007), University of Toronto.

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Directions to my office

My office is in room BA5270 on the 5th floor of the Bahen Centre for Information Technology (BCIT), 40 St. George Street, on the downtown St. George Campus of the University of Toronto.

If you are taking the subway:

Get off at Queens Park station, and walk west along College Street till you reach St. George Street. Turn right onto St. George Street. BCIT is the second (newer) building on your left (see map below).

If you are driving:

From College Street, turn onto Huron Street heading north, then take the first right into the entrance to the underground parking lot for BCIT.

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