CSAIL Event Calendar: Previous Series

Developer Tools to Automatically Generate Sketch Recognition User Interfaces

Speaker: Tracy Hammond , CSAIL, MIT
Date: November 1 2004
Time: 4:10PM to 5:00PM
Location: Patil/Kive Seminar room 32-G449
Contact: Louis-Philippe Morency, 617-253-4278, lmorency@csail.mit.edu
Relevant URL:

Sketch recognition systems are currently being developed for many domains, but can be time consuming to build if they are to handle the intricacies of each domain. Rather than build each recognition system separately, our group's philosophy is to have one recognition system that can be augmented for each domain. The developer simply writes a domain description in LADDER, the first language to describe how shapes in a domain are drawn, displayed, and edited. This domain description is then used to automatically generate a sketch recognition user interface for that domain.


To allow developers to automatically generate sketch recognition user interfaces, I have created 1) the LADDER sketch language, 2) a translator which transforms a domain description into domain specific recognizers, exhibitors, and editors, to be used by 3) a general recognition system that uses lower level recognizers in combination with the generated recognizers to recognize neatly hand-drawn shapes in domain. Because shape descriptions may be imperfect, I have also created 4) a shape description debugger that displays suspected near miss examples for over- and under-constrained shapes.

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