VXT: a visual approach to XML transformations
DocEng '01 Proceedings of the 2001 ACM Symposium on Document engineering
Sketch-Based User Interface for Inputting Graphic Objects on Small Screen Devices
GREC '01 Selected Papers from the Fourth International Workshop on Graphics Recognition Algorithms and Applications
QuickDiagram: a system for online sketching and understanding of diagrams
GREC'09 Proceedings of the 8th international conference on Graphics recognition: achievements, challenges, and evolution
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We present a visual approach to layout documents as hand-drawn compositions of simple geometric shapes, based on a grammatical method to support document design, through sketch recognition, which explicitly addresses visual ambiguity. We use fuzzy relational adjacency grammars to provide a natural handling of fuzzy logic and spatial relation syntax in a single unified formalism. Fuzzy relations enable us to replace spatial constraints such as 驴a is above b驴 or 驴a is parallel to c驴 by quantities that express a degree of uncertainty. Their use allows us to associate a 驴measure of goodness驴 to all data and to intermediate and final results. We developed a prototype application that supports document layout sketching in a simple way.