Multi-Dimensional Interval Algebra with Symmetry for Describing Block Layouts

@inproceedings{Lahoti1999MultiDimensionalIA,
  title={Multi-Dimensional Interval Algebra with Symmetry for Describing Block Layouts},
  author={Ankur Lahoti and Rohitendra Singh and Amitabha Mukerjee},
  booktitle={GREC},
  year={1999}
}
Describing the relative positions of Rectangular boxes on a page is a fundamental task in document layout processing. Typically, this is achieved by comparing quantitative values of the endpoints of the rectangle. Such a representation expresses a property that is basic for the "interval" as a conjunction of relations for the "point". In this work, we adopt a qualitative interval projectionmodel to describe the relative positions of such blocks using interval algebra, which defines the spatial… 
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