Merged Multiresolution Hierarchies for Shadow Map Compression

Computer Graphics Forum (Proc. of Pacific Graphics), Volume 35, Number 7 - October 2016
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Multiresolution Hierarchies (MH) and Directed Acyclic Graphs (DAG) are two recent approaches or the compression of highresolution shadow information. In this paper, we introduce Merged Multiresolution Hierarchies (MMH), a novel data structure that unifies both concepts. An MMH leverages both hierarchical homogeneity exploited in MHs, as well as topological similarities exploited in DAG representations. We propose an efficient hash-based technique to quickly identify and remove redundant subtree instances in a modified relative MH representation. Our solution remains lossless and significantly improves the compression rate compared to both preceding shadow map compression algorithms, while retaining the full run-time performance of traditional MH representations.

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BibTex references

@Article { SBE16a,
  author       = "Scandolo, Leonardo and Bauszat, Pablo and Eisemann, Elmar",
  title        = "Merged Multiresolution Hierarchies for Shadow Map Compression",
  journal      = "Computer Graphics Forum (Proc. of Pacific Graphics)",
  number       = "7",
  volume       = "35",
  month        = "October",
  year         = "2016",
  url          = ""

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