A study of diagrammatic ink in lecture

Authors:
Richard Anderson;Ruth Anderson;Crystal Hoyer;Craig Prince;Jonathan Su;Fred Videon;Steven Wolfman
Affiliations:
Department of Computer Science and Engineering, University of Washington, Seattle, WA 98195, USA;Department of Computer Science, University of Virginia, Charlottesville, VA 22904, USA;Department of Computer Science and Engineering, University of Washington, Seattle, WA 98195, USA;Department of Computer Science and Engineering, University of Washington, Seattle, WA 98195, USA;Department of Computer Science and Engineering, University of Washington, Seattle, WA 98195, USA;Department of Computer Science and Engineering, University of Washington, Seattle, WA 98195, USA;Department of Computer Science, University of British Columbia, Vancouver, BC, Canada V6T 1Z4
Venue:
Computers and Graphics
Year:
2005

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Abstract

In this paper, we present a study of how instructors draw diagrams in the process of delivering lectures. We are motivated by wanting to understand challenges and opportunities for automatically analyzing diagrams, and to use this to improve tools to support the delivery of presentations and the viewing of archived lectures. The study was conducted by analyzing a large group of examples of diagrams collected from real lectures that were delivered from a Tablet PC. The main result of the paper is the identification of three specific challenges in analyzing spontaneous instructor diagrams: separating the diagram from its annotations and other surrounding ink, identifying phases in discussion of a diagram, and constructing the active context in a diagram.