de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Conference Paper

Real-time Quadtree Analysis using HistoPyramids

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons45805

Ziegler,  Gernot
Computer Graphics, MPI for Informatics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons45610

Theobalt,  Christian
Computer Graphics, MPI for Informatics, Max Planck Society;
Programming Logics, MPI for Informatics, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons45449

Seidel,  Hans-Peter
Computer Graphics, MPI for Informatics, Max Planck Society;

Locator
There are no locators available
Fulltext (public)
There are no public fulltexts available
Supplementary Material (public)
There is no public supplementary material available
Citation

Ziegler, G., Dimitrov, R., Theobalt, C., & Seidel, H.-P. (2007). Real-time Quadtree Analysis using HistoPyramids. In N. Kehtarnavaz, & M. F. Carlsohn (Eds.), Real-Time Image Processing 2007 (pp. 1-11). Bellingham, WA, USA: SPIE.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-2076-6
Abstract
Region quadtrees are convenient tools for hierarchical image analysis. Like the related Haar wavelets, they are simple to generate within a fixed calculation time. The clustering at each resolution level requires only local data, yet they deliver intuitive classification results. Although the region quadtree partitioning is very rigid, it can be rapidly computed from arbitrary imagery. This research article demonstrates how graphics hardware can be utilized to build region quadtrees at unprecedented speeds. To achieve this, a data-structure called HistoPyramid registers the number of desired image features in a pyramidal 2D array. Then, this HistoPyramid is used as an implicit indexing data structure through quadtree traversal, creating lists of the registered image features directly in GPU memory, and virtually eliminating bus transfers between CPU and GPU. With this novel concept, quadtrees can be applied in real-time video processing on standard PC hardware. A multitude of applications in image and video processing arises, since region quadtree analysis becomes a light-weight preprocessing step for feature clustering in vision tasks, motion vector analysis, PDE calculations, or data compression. In a sidenote, we outline how this algorithm can be applied to 3D volume data, effectively generating region octrees purely on graphics hardware.