PhD Seminar • Human-Computer Interaction • Scatterpixels: Ad Hoc Reconfigurable Physical Pixel Displays

Please note: This PhD seminar will take place in DC 1304 and online.

Antony Albert Raj Irudayaraj, PhD candidate
David R. Cheriton School of Computer Science

Supervisors: Professors Daniel Vogel, Omid Abari

Computer displays are a matrix of small, precisely aligned pixels to maximize fidelity within a standardized, defined area. We explore an alternative concept where pixels are individual physical entities that can be physically positioned and combined to create temporary ad hoc displays with arbitrary shapes, sizes, and functions. The fabrication and hardware design for a spherical single LED pixel is described that is inexpensive, wireless, and rechargeable with more than 70 pixels assembled. Smartphone-based computer vision methods are developed to register the positions of addressable pixels in arbitrary arrangements, and interactively guide fine-tuning of pixel positions when display content is known. Once registered, algorithms are presented to optimally render content on the pixels, and a communication protocol enables frame rates suitable for animation. Example pixel display configurations are described for applications like audience participation, way-finding, dynamic event signage, time-keeping, scoreboards, and ambient displays.

To attend this PhD seminar in person, please go to DC 1304. You can also attend virtually using Zoom at https://uwaterloo.zoom.us/j/92400119916.