Electronic annotation of documents with preexisting content

摘要

In a pen-based computing system, a printed version of a document having preexisting content is annotated using a smart pen. The smart pen captures handwriting gestures to obtain an electronic representation of the annotations. The smart pen computing system identifies a digital version of the document having the preexisting content and stores the electronic representation of the annotations in association with the digital document. The smart pen computing system may overlay the electronic representation of the annotations with the preexisting content to provide a digital representation of the annotated document.