Moving markup: repositioning freeform annotations

  • Authors:

  • Gene Golovchinsky;Laurent Denoue

  • Affiliations:

  • FX Palo Alto Laboratory, Inc., Palo Alto, CA;FX Palo Alto Laboratory, Inc., Palo Alto, CA

  • Venue:
  • Proceedings of the 15th annual ACM symposium on User interface software and technology
  • Year:
  • 2002

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Abstract

Freeform digital ink annotation allows readers to interact with documents in an intuitive and familiar manner. Such marks are easy to manage on static documents, and provide a familiar annotation experience. In this paper, we describe an implementation of a freeform annotation system that accommodates dynamic document layout. The algorithm preserves the correct position of annotations when documents are viewed with different fonts or font sizes, with different aspect ratios, or on different devices. We explore a range of heuristics and algorithms required to handle common types of annotation, and conclude with a discussion of possible extensions to handle special kinds of annotations and changes to documents.