Evaluation of Paper-Pen based Sketching Interface

The retrieval and browsing of diagrammatic information extracted from hand-drawn diagrams would open up a rich form of information interaction. However, such sketches currently require handannotations in order to be understood by the computer. While improvements in sketch recognition algorithms have enabled automatic recognition for Tablet PCsketched diagrams, such progress has been constrained to online algorithms. As a result, offline algorithms that are relevant to diagrams sketched on paper remain dominantly domain-dependent, and are also restrictive in the number of diagrams that can be understood. In this paper, we discuss our research aims for providing users with information interaction that exploit the advantages of automatic correction capabilities found in online sketch recognition algorithms, with the low-cost advantages found in paper usage.