# Difference between revisions of "Wavelets on Trees"

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* Comments, questions or concerns should be directed to: godwinsh@usc.edu | * Comments, questions or concerns should be directed to: godwinsh@usc.edu | ||

− | * [http:// | + | * [http://sipi.usc.edu/~ortega/GodwinShenCode/WSN_SampleCode_v6.zip MATLAB source code for wavelets on trees in WSN] |

− | ** Last Updated On: | + | ** Last Updated On: February 24, 2010 |

+ | *** Added experiment using Great Duck Island data (2/24/10) | ||

+ | *** Fixed bugs in transform initialization (11/13/09) | ||

*** Fixed a bug in cost computations (9/24/09) | *** Fixed a bug in cost computations (9/24/09) | ||

*** New cost computations added (8/20/09) | *** New cost computations added (8/20/09) | ||

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** The main files to start with are Example_LossyCoding.m and Example_LosslessCoding.m | ** The main files to start with are Example_LossyCoding.m and Example_LosslessCoding.m | ||

+ | * [http://sipi.usc.edu/~ortega/GodwinShenCode/ICASSP10_Code.zip MATLAB source code for even/odd optimization in WSN] | ||

+ | ** This code implements the even/odd optimization algorithm in our ICASSP 2010 paper | ||

+ | ** Last Updated On: March 25, 2010 | ||

+ | |||

+ | * [http://sipi.usc.edu/~ortega/GodwinShenCode/IPSN08_Code.zip MATLAB source code for joint routing and transform optimization in WSN] | ||

+ | ** This code implements the joint optimization algorithm in our IPSN 2008 paper | ||

+ | ** Last Updated On: March 25, 2010 | ||

== Related Publications == | == Related Publications == | ||

<ul> | <ul> | ||

− | <li> G. Shen and A. Ortega, "Transform-based Distributed Data Gathering". <i> | + | <li> G. Shen and A. Ortega, "Transform-based Distributed Data Gathering". <i>To Appear in IEEE Transactions on Signal Processing</i>. |

− | [http://arxiv.org/abs/0909. | + | [http://arxiv.org/abs/0909.5177v3 <small><b>arXiv:0909.5177v3</b></small>]</ul> |

<ul> | <ul> | ||

− | <li> G. Shen | + | <li> S.K. Narang, G. Shen and A. Ortega, "Unidirectional Graph-based Wavelet Transforms for Efficient Data Gathering in Sensor Netowkrs". <i>In Proc. of 2010 IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP'10),</i> Dallas, April 2010.</ul> |

− | |||

<ul> | <ul> | ||

<li> G. Shen, S. Narang and A. Ortega, "Adaptive Distributed Transforms for Irregularly Sampled Wireless Sensor Networks". <i>In Proc. of 2009 IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP'09),</i> Taipei, April 2009. | <li> G. Shen, S. Narang and A. Ortega, "Adaptive Distributed Transforms for Irregularly Sampled Wireless Sensor Networks". <i>In Proc. of 2009 IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP'09),</i> Taipei, April 2009. | ||

[http://biron.usc.edu/~godwinsh/Papers/ICASSP09_Filter_Opt.pdf <small><b>PDF format</b></small>]</ul> | [http://biron.usc.edu/~godwinsh/Papers/ICASSP09_Filter_Opt.pdf <small><b>PDF format</b></small>]</ul> | ||

+ | |||

+ | <ul> | ||

+ | <li> G. Shen and A. Ortega, "Joint Routing and 2D Transform Optimization for Irregular Sensor Network Grids Using Wavelet Lifting". <i>In Proc. of Fifth Intl. Conf. on Information Processing in Sensor Networks (IPSN'08),</i> St. Louis, April 2008. | ||

+ | [http://biron.usc.edu/~godwinsh/Papers/IPSN08ShenOrtega.pdf <small><b>PDF format</b></small>]</ul> | ||

<ul> | <ul> | ||

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* [http://anrg.usc.edu/SenZip/ SenZip] | * [http://anrg.usc.edu/SenZip/ SenZip] | ||

* [http://biron.usc.edu/wiki/index.php/CompressionGroup/DSNProject Distributed Compression for Sensor Networks] | * [http://biron.usc.edu/wiki/index.php/CompressionGroup/DSNProject Distributed Compression for Sensor Networks] | ||

− | * [http://biron.usc.edu/wiki/index.php/CompressionGroup | + | * [http://biron.usc.edu/wiki/index.php/GraphWavelets Wavelet Filterbanks on Graph] |

− | + | * [http://biron.usc.edu/wiki/index.php?title=CompressionGroup Compression Research Group] | |

== Acknowledgements == | == Acknowledgements == | ||

* This work was supported in part by NASA under grant AIST-05-0081 | * This work was supported in part by NASA under grant AIST-05-0081 |

## Latest revision as of 22:43, 4 January 2012

## Contents

## General Information

- This website provides source code for wavelet transforms on trees, with applications to:
- Distributed data compression for wireless sensor networks
- Image coding

- Publications describing these transforms can be found at:
- Distributed Compression for Sensor Networks web page for transforms used in WSN
- Godwin Shen's web page for transforms used in image coding (and WSN)

- This page is maintained by Godwin Shen
- Email: godwinsh@usc.edu

## Source Code

- Comments, questions or concerns should be directed to: godwinsh@usc.edu

- MATLAB source code for wavelets on trees in WSN
- Last Updated On: February 24, 2010
- Added experiment using Great Duck Island data (2/24/10)
- Fixed bugs in transform initialization (11/13/09)
- Fixed a bug in cost computations (9/24/09)
- New cost computations added (8/20/09)

- This code provides implementations of the transforms described in the related publications shown below
- The main files to start with are Example_LossyCoding.m and Example_LosslessCoding.m

- Last Updated On: February 24, 2010

- MATLAB source code for even/odd optimization in WSN
- This code implements the even/odd optimization algorithm in our ICASSP 2010 paper
- Last Updated On: March 25, 2010

- MATLAB source code for joint routing and transform optimization in WSN
- This code implements the joint optimization algorithm in our IPSN 2008 paper
- Last Updated On: March 25, 2010

## Related Publications

- G. Shen and A. Ortega, "Transform-based Distributed Data Gathering".
*To Appear in IEEE Transactions on Signal Processing*.**arXiv:0909.5177v3**

- S.K. Narang, G. Shen and A. Ortega, "Unidirectional Graph-based Wavelet Transforms for Efficient Data Gathering in Sensor Netowkrs".
*In Proc. of 2010 IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP'10),*Dallas, April 2010.

- G. Shen, S. Narang and A. Ortega, "Adaptive Distributed Transforms for Irregularly Sampled Wireless Sensor Networks".
*In Proc. of 2009 IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP'09),*Taipei, April 2009.**PDF format**

- G. Shen and A. Ortega, "Joint Routing and 2D Transform Optimization for Irregular Sensor Network Grids Using Wavelet Lifting".
*In Proc. of Fifth Intl. Conf. on Information Processing in Sensor Networks (IPSN'08),*St. Louis, April 2008.**PDF format**

- G. Shen and A. Ortega, "Optimized Distributed 2D Transforms for Irregularly Sampled Sensor Network Grids Using Wavelet Lifting".
*In Proc. of 2008 IEEE Intl. Conf. on Acoustics, Speech and Signal Processing (ICASSP'08),*Las Vegas, April 2008.**PDF format**

## Related Links

- SenZip
- Distributed Compression for Sensor Networks
- Wavelet Filterbanks on Graph
- Compression Research Group

## Acknowledgements

- This work was supported in part by NASA under grant AIST-05-0081