Eric version 1.2 Eric A. Lehmann

Visit the complete frame-based website!

Hello and welcome to my web page!

I am a research scientist/engineer with a degree in Electrical Engineering from the Swiss Federal Institute of Technology (ETHZ). I was also awarded a Master's Degree and a Ph.D. for my research in the Faculty of Engineering and Information Technology (FEIT) and the Research School of Information Sciences and Engineering (RSISE), respectively, at the Australian National University (ANU) in Canberra, Australia.

After having worked as Research Engineer on the Audio Tracking Project with National ICT Australia Ltd (NICTA, now part of CSIRO's Data61 Business Unit), I held a post-doctoral position for three years with the Western Australian Telecommunications Research Institute (WATRI) in Perth, Australia (within the Faculty of Engineering and Computing, Curtin University of Technology, Perth). As part of my work at WATRI, I was involved in the Last Metre Problem (LaMP) research project carried out in collaboration with, and partly funded by NICTA.

A significant part of my career so far (Master's, Ph.D. and Post-Doc) was focussed on acoustics and Bayesian methods (sequential Monte Carlo), with significant research work carried out on various aspects of microphone array processing, acoustic beamforming, and acoustic source localisation and tracking. Have a look at this page for a brief overview of some of this work.

I am now involved with the development of image processing and (Bayesian) data fusion techniques for a number of environmental monitoring applications using synthetic aperture radar and optical remote sensing data, among others. My current employment is as a Research Scientist for the Commonwealth Scientific and Industrial Research Organisation (CSIRO), within the Remote Sensing and Image Integration team of the Data61 business unit (also formerly known as Digital Productivity Flagship; CSIRO Computational Informatics, CCI; CSIRO Mathematics, Informatics & Statistics, CMIS; and CSIRO Mathematical & Information Sciences, CMIS) in Canberra, Australian Capital Territory. Information about some of the projects I am currently working on (or have been involved with) at CSIRO can be found here.

This simple web site aims to provide some basic information about who I am and what I do. Please feel free to contact me directly if you would like more specific information about me or my work.

Thanks for visiting! I hope you find these few pages interesting and useful...



On this web page...

Here is a summary of the information that you will find further below on this web page:


Quick links:  a few quick links to some information of potential interest about me... Back to top



Contact details:  here is how you can get hold of me... Back to top

The contact details provided below correspond to my current position with the Commonwealth Scientific and Industrial Research Organisation (CSIRO), within the Data61 business unit in Canberra, ACT.

Office:
CSIRO Data61
CSIRO Building 801 - Synergy
North Science Road
Acton ACT 2601
Australia

Mailing address:
CSIRO Data61
GPO Box 1700
Canberra ACT 2601
Australia

Phone: +61 (0)2 6216 7070
Fax: +61 (0)2 6216 7111
E-mail:
Web: http://www.eric-lehmann.com



About me:  my life at a glance... Back to top

I was born in Porrentruy, Jura, Switzerland, and spent the first 20 to 25 years of my life around that place doing all sorts of stuff.

Then in 1999, after finishing my undergraduate studies at the ETHZ in Zurich, I challenged myself to go and study overseas for a while. That turned out to work pretty well as I spent about 5 years at the ANU in Canberra, followed by a 3 year postdoc with the WA Telecommunications Research Institute (WATRI) in Perth, Australia, and I am now holding a permanent position of Research Scientist with CSIRO in Canberra, ACT. On March 23, 2009, I also officially became a citizen of Australia.

The best way to describe myself is probably as someone who enjoys cooking, playing pool (billiards), swimming, horse riding, and playing guitar and didgeridoo, among lots of other things. One way or another, I also grew up to become a fanatical addict of LaTeX, Linux, and the Calvin & Hobbes comic strips. However, all this good stuff flew out of the window following the birth of my two overly hyper-active boys in the early 2010s—I now spend 100% of my free time baby sitting...


Short bio:  if you prefer something more formal...

Eric Lehmann graduated in 1999 from the Swiss Federal Institute of Technology in Zurich (ETHZ), Switzerland, with a Diploma in Electrical Engineering (Master equivalent). He received the M.Phil. and Ph.D. degrees, both in Electrical Engineering, from the Australian National University (Canberra) in 2000 and 2004 respectively.
Between 2004 and 2008, he held various research positions with National ICT Australia (NICTA) in Canberra, ACT, as well as the Western Australian Telecommunications Research Institute (WATRI) in Perth, WA. He is now working as a Research Scientist for the Commonwealth Scientific and Industrial Research Organisation (CSIRO) in Canberra, within the Data61 business unit (Remote Sensing and Image Integration team).
His current scientific interests include various aspects of signal and image processing, statistical modelling methods for spatio-temporal data fusion / integration, and processing of remote sensing data (including in-situ sensors) for environmental mapping and monitoring applications.


Curriculum:  here is a link to my Curriculum Vitæ. Or simply see below for online information...




Education background Back to top


Postgraduate
2001 - 2004 Ph.D. in Engineering, Research School of Information Sciences and Engineering, the Australian National University, Canberra, Australia
Topic: "Particle Filtering Methods for Acoustic Source Localisation and Tracking"
1999 - 2000 M.Phil. in Engineering, Faculty of Engineering and Information Technology, The Australian National University, Canberra, Australia
Topic: "Real-Time Implementation of a Nearfield Broadband Acoustic Beamformer"


Undergraduate
1994 - 1999
Dipl. El.-Ing. ETH (electrical engineering), Department of Electrical Engineering, Swiss Federal Institute of Technology, Zurich, Switzerland (ETHZ)
Specialisation in Signal Processing. Diploma work: "Implementation of Control Algorithms for a Satellite Laser Pointing Mechanism"

Work experience

2008 - present
Research Scientist with the Commonwealth Scientific and Industrial Research Organisation (CSIRO), within the Data61 business unit (Remote Sensing and Image Integration team). Amongst others, this position currently involves the use of image processing techniques for remote sensing data such as airborne and satellite imagery, as well as synthetic aperture radar (SAR). The focus is on the multi-sensor integration and analysis of spatial and temporal data in order to provide accurate information on environmental factors such as vegetation cover and land use, as well as their changes over time. These projects are carried out in collaboration with various industrial and governmental organisations in Australia and overseas.

Main research activities (current and past) are provided in the following list (further details and references for some of these projects are provided here):
  • Monitoring of water quality for inland waterbodies using remote sensing imagery, in collaboration with the NSW DPI Water office, as well as within the NAWRA framework
  • Radar remote sensing: data fusion of synthetic aperture radar (SAR) data with optical Landsat imagery for forest mapping and monitoring (part of the GEO Forest Carbon Task)
  • Statistical climatology: application of spatial Bayesian hierarchical models for the analysis of extreme weather events (such as precipitation, temperature, etc.), based on current and future projections of regional and global climate models (RCM/GCM)
  • Blending methodologies: assessment and further development of existing/new data blending methods for multiple remote sensing products
  • Model—data fusion techniques: data assimilation of soil moisture observations (remote sensing) with model estimates for water resources assessment across Australia (part of the WIRADA partnership between CSIRO and Australia's Bureau of Meteorology, see more info here)
  • Vegetation trends product: derivation and computation of vegetation trends across Australia since 1972 (part of Australia's National Carbon Accounting System, NCAS)
  • Sparse vegetation monitoring: classification of sparsely vegetated zones (5-20% canopy cover) across Australia since 1989 (part of NCAS)
  • Seabed mapping: development of spatial tools for mapping coastal seabed condition using acoustic swath data (multi-beam echosounder) and video data
2005 - 2008 Research Fellow within the Signal Processing Laboratory at the Western Australian Telecommunications Research Institute (WATRI), Perth, Australia. My research at WATRI dealt with various aspects of array signal processing, acoustic speaker tracking and speech enhancement. An example of the type of research I was working on can be found here. As part of my work at WATRI, I was involved in the Last Metre Problem (LaMP) research project carried out in collaboration with, and partly funded by National ICT Australia (NICTA).

Main research activities included:
  • Source tracking: acoustic speaker localisation and tracking by means of array signal processing and sequential Monte Carlo (SMC) methods
  • Voice activity detection: integration of VAD data into SMC algorithm for acoustic speaker tracking
  • Dynamics tracking: optimisation of dynamics models for speaker tracking using SMC and evolutionary algorithms
  • Room acoustics: reverberation modelling for the simulation of room impulse responses
  • Other research: speech onset detection for improved time-delay estimation; minimum statistics (noise tracking) for voice activity detection; circular array processing for angle-of-arrival speaker tracking; joint audio-video speaker tracking
2004 (3 months) Research Engineer with National ICT Australia Ltd (NICTA). This work involved the implementation of a real-time algorithm for localising and tracking an acoustic source in reverberant environments, using an array of microphones. This algorithm was based on a particle filtering method using importance sampling, developed during my previous Ph.D. research. Some demonstration results from this application can be found here.

Other achievements



Current and past research Back to top

Please follow these links for an overview of my current research work at CSIRO and my past research on audio tracking projects.


Ph.D. research

My Ph.D. research project focused on the study of sequential Monte Carlo methods as a new tool for carrying out various signal processing tasks. More specifically, I was working on the problem of acoustic source localisation and tracking in reverberant environments, using array signal processing principles. In this specific case, particle filters offer an efficient way of dealing with the complex problem of reverberation. The project involved primarily the development and test of several particle filter algorithms using recordings of real audio data.

As a major result of this research, a particle filter using the principle of importance sampling was designed and successfully tested. This algorithm allows the automatic detection of new speakers entering the acoustic scene and also automatically recovers following the occurrence a track loss (for instance as a result of a pause in the speech signal). This specific particle filter was also implemented in real-time on a standard Linux-based desktop computer and tested in a typical office room equipped with a 16 sensor array. Some tracking examples from this algorithm have been recorded (originally running in real-time) and can be found for demonstration purposes here.

This project was undertaken under the supervision of Prof. Robert Williamson at ANU, Canberra. Part of this research was also done in joint collaboration with Dr. Darren Ward, Imperial College, London.


Other Ph.D. research interests

My Ph.D. led me to focus principally on Bayesian estimation and Sequential Monte Carlo methods, acoustic source localisation and tracking, and array signal processing. More generally however, my main research interests also include (in random order):
  • acoustics
  • digital signal processing
  • speech processing and enhancement
  • algorithms for real-time audio processing
  • multimedia information processing and human-machine interaction
I also highly enjoy any kind of software programming and GUI development in general (Assembler, Matlab, C, etc.).



Publications Back to top

Copyright: This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Copyright notice for IEEE publications: ©20XX IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Copyright notice for JASA publications: ©20XX American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

Notes:
  • In the lists below, publications listed in green are the result of my work as a CSIRO Research Scientist.
  • The PDF Preprint documents provided below represent final revisions submitted to the respective journal or conference prior to publication.
  • View the citations to these papers on Google Scholar.

Theses
[T2] E. A. Lehmann, "Particle Filtering Methods for Acoustic Source Localisation and Tracking", Ph.D. Thesis (Engineering), The Australian National University (ANU), Research School of Information Sciences and Engineering, July 2004.
[PDF (4.2MB), gzipped postscript (2.1MB), BibTeX+Abstract]
Cross-ref.: see also [J1], [J2], [C1], [P1] and [R1] for related and/or updated contents.
[T1] E. A. Lehmann, "Real-Time Implementation of a Nearfield Broadband Acoustic Beamformer", M.Phil. Engineering Thesis, The Australian National University (ANU), Faculty of Engineering and Information Technology, November 2000.
[PDF (2MB), gzipped postscript (2.2MB), BibTeX+Abstract]

Book chapters
[B1] Sven E. Nordholm, Hai H. Dam, Chiong C. Lai, and Eric A. Lehmann, "Broadband Beamforming and Optimization". In: Rama Chellappa, and Sergios Theodoridis (Eds.), Academic Press Library in Signal Processing: Volume 3 - Array and Statistical Signal Processing, Academic Press, pp. 553-598 (Chapter 13), 2014. ISBN 978-0-12-411597-2.
[book link, chapter download]

Journal papers (peer-reviewed)
[J15] Alec G. Stephenson, Eric A. Lehmann and Aloke Phatak, A max-stable process model for rainfall extremes at different accumulation durations, Weather and Climate Extremes, vol. 13, pp. 44–53, September 2016.
[published paper]
[J14] Eric A. Lehmann, Aloke Phatak, Alec Stephenson and Rex Lau, Spatial modelling framework for the characterisation of rainfall extremes at different durations and under climate change, Environmetrics, vol. 27, nr. 4, pp. 239–251, June 2016.
[PDF Preprint, published paper, Supplementary Material]
[J13] J. Reiche, R. Lucas, A. Mitchell, J. Verbesselt, D. Hoekman, J. Haarpaintner, J. Kellndorfer, A Rosenqvist, Eric A. Lehmann, C. Woodcock, F.M. Seifert and M. Herold, Combining satellite data for better tropical forest monitoring, Nature Climate Change, vol. 6, pp. 120–122, February 2016.
[published paper]
[J12] Eric A. Lehmann, Peter Caccetta, Kim Lowell, Anthea Mitchell, Zheng-Shu Zhou, Alex Held, Tony Milne and Ian Tapley, SAR and optical remote sensing: assessment of interoperability and complementarity in the context of a large-scale operational forest monitoring system, Remote Sensing of Environment, vol. 156, pp. 335–348, January 2015.
[PDF Preprint (1MB), BibTeX+Abstract, published paper, Graphical Abstract (600kB)]
[J11] A.L. Mitchell, I. Tapley, A.K. Milne, M.L. Williams, Z.-S. Zhou, E.A. Lehmann, P. Caccetta, K. Lowell, and A. Held, C- and L-band SAR interoperability: Filling the gaps in continuous forest cover mapping in Tasmania, Remote Sensing of Environment, vol. 155, pp. 58–68, December 2014.
[BibTeX+Abstract, published paper]
[J10] Liangyun Liu, Huan Tang, Peter Caccetta, Eric A. Lehmann, Yong Hu and Xiaoliang Wu, Mapping afforestation and deforestation from 1974 to 2012 using Landsat time-series stacks in Yulin District, a key region of the Three-North Shelter region, China, Environmental Monitoring and Assessment, vol. 185, nr. 12, pp. 9949-9965, December 2013.
[BibTeX+Abstract, published paper]
[J9] Eric A. Lehmann, Jeremy F. Wallace, Peter A. Caccetta, Suzanne L. Furby and Katherine Zdunic, Forest cover trends from time series Landsat data for the Australian continent, International Journal of Applied Earth Observation and Geoinformation, vol. 21, pp. 453–462, April 2013.
[PDF Preprint (6.1MB), BibTeX+Abstract, published paper]
[J8] Grace S. Chiu, Eric A. Lehmann and Joshua C. Bowden, A spatial modelling approach for the blending and error characterization of remotely sensed soil moisture products, Journal of Environmental Statistics, vol. 4, nr. 9, pp. 1-17, April 2013.
[BibTeX+Abstract, published paper]
[J7] Eric A. Lehmann, Peter A. Caccetta, Zheng-Shu Zhou, Stephen J. McNeill, Xiaoliang Wu and Anthea L. Mitchell, Joint processing of Landsat and ALOS-PALSAR data for forest mapping and monitoring, IEEE Transactions on Geoscience and Remote Sensing, vol. 50, nr. 1, pp. 55-67, January 2012.
[PDF Preprint (1.2MB), BibTeX+Abstract, published paper]
[J6] Eric A. Lehmann and Anders M. Johansson, Diffuse Reverberation Model for Efficient Image-Source Simulation of Room Impulse Responses, IEEE Transactions on Audio, Speech and Language Processing, vol. 18, no. 6, pp. 1429-1439, August 2010.
[PDF Preprint (340kB), BibTeX+Abstract, supplementary material, published paper]
[J5] Anders M. Johansson and Eric A. Lehmann, Evolutionary Optimization of Dynamics Models in Sequential Monte Carlo Target Tracking, IEEE Transactions on Evolutionary Computation, vol. 13, no. 4, pp. 879-894, August 2009.
[PDF Preprint (715kB), BibTeX+Abstract, published paper]
[J4] Eric A. Lehmann and Anders M. Johansson, Prediction of Energy Decay in Room Impulse Responses Simulated with an Image-Source Model, Journal of the Acoustical Society of America, vol. 124, nr. 1, pp. 269-277, July 2008.
[PDF Preprint (450kB), BibTeX+Abstract, supplementary material, published paper]
Cross-ref.: see also [C7] and [R4] for related work.
[J3] Eric A. Lehmann and Anders M. Johansson, Particle Filter with Integrated Voice Activity Detection for Acoustic Source Tracking, EURASIP Journal on Advances in Signal Processing, vol. 2007, Article ID 50870, 11 pages, 2007.
[PDF Preprint (270kB), BibTeX+Abstract, published paper]
Cross-ref.: see also [C3], [C4] and [R2] for related work.
[J2] Eric A. Lehmann and Robert C. Williamson, Particle Filter Design using Importance Sampling for Acoustic Source Localisation and Tracking in Reverberant Environments, EURASIP Journal on Applied Signal Processing, special issue on Advances in Multi-Microphone Speech Processing, vol. 2006, Article ID 17021, 9 pages, 2006.
[PDF Preprint (330kB), BibTeX+Abstract, supplementary material, published paper]
Cross-ref.: see also [P1] for related work.
[J1] Darren B. Ward, Eric A. Lehmann, and Robert C. Williamson, Particle Filtering Algorithms for Tracking an Acoustic Source in a Reverberant Environment, IEEE Transactions on Speech and Audio Processing, vol. 11, nr. 6, pp. 826-836, November 2003.
[PDF Preprint (500kB), BibTeX+Abstract, published paper]
Cross-ref.: see also [C1] for related work.

Conference and workshop papers (peer-reviewed)
[C13] B. Bates, D. Argueso, J. Evans, J. Green, A. Griesser, D. Jakob, A. Seed, R. Lau, E. Lehmann, A. Phatak, D. Abbs, S. Lavender, K. Nguyen, T. Rafter, M. Thatcher, F. Zheng, S. Westra and M. Leonard, Preliminary assessment of the impact of climate change on design rainfall IFD curves, Hydrology and Water Resources Symposium (HWRS), pp. 9-16, Hobart TAS, Australia, December 2015.
[published paper]
[C12] S. Soltyk, M. Leonard, A. Phatak, and E. Lehmann, Statistical modelling of rainfall intensity-frequency-duration curves using regional frequency analysis and Bayesian hierarchical modelling, Hydrology and Water Resources Symposium (HWRS), pp. 302-309, Perth, Australia, February 2014.
[BibTeX+Abstract, published paper (280kB)]
[C11] E.A. Lehmann, A. Phatak, S. Soltyk, J. Chia, R. Lau and M. Palmer, Bayesian hierarchical modelling of rainfall extremes, International Congress on Modelling and Simulation (MODSIM'2013), pp. 2806-2812, Adelaide, Australia, December 2013.
[PDF preprint (370kB), BibTeX+Abstract, published paper]
[C10] G. Chiu and E. Lehmann, Bayesian hierarchical modelling: incorporating spatial information in water resources assessment and accounting, International Congress on Modelling and Simulation (MODSIM'2011), pp. 3349-3355, Perth, Australia, December 2011.
[BibTeX+Abstract, published paper, appendix (670kB)]
[C9] B. Henderson, S. Barry, G. Chiu, A. Frost, W. Jin, E. Lehmann, L. Renzullo, M. Stenson, and A. Van Dijk, Balancing models and data: Model data fusion for improved continental water resource assessment, Water Information Research and Development Alliance (WIRADA) Science Symposium, Melbourne, Australia, August 2011.
[published paper: WIRADA Symposium Proceedings]
[C8] E. Lehmann, Z.-S. Zhou, P. Caccetta, A. Mitchell, A. Milne, K. Lowell and S. McNeill, Combined Analysis of Optical and SAR Remote Sensing Data for Forest Mapping and Monitoring, International Symposium on Digital Earth (ISDE7), Perth, Australia, August 2011.
[PDF Preprint (1.8MB), BibTeX+Abstract, published paper]
[C7] Eric A. Lehmann, Anders M. Johansson, and Sven Nordholm, Reverberation-Time Prediction Method for Room Impulse Responses Simulated with the Image-Source Model, Proceedings of the IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA'07), pp. 159-162, New Paltz, NY, USA, October 2007.
[PDF Preprint (148kB), Revised PDF (150kB), BibTeX+Abstract, supplementary material, published paper]
Note: the revised version of this paper contains a number of minor corrections made to the paper after its publication in WASPAA.
Cross-ref.: see also [J4] and [R4] for related work.
[C6] Eric A. Lehmann, Anders M. Johansson, and Sven Nordholm, Modeling of Motion Dynamics and its Influence on the Performance of a Particle Filter for Acoustic Speaker Tracking, Proceedings of the IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA'07), pp. 98-101, New Paltz, NY, USA, October 2007.
[PDF Preprint (235kB), BibTeX+Abstract, published paper]
Cross-ref.: see also [R3] for related work.
[C5] Thorsten Kühnapfel, Tele Tan, Svetha Venkatesh, and Eric Lehmann, Calibration of Audio-Video Sensors for Multi-Modal Event Indexing, Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP'07), vol. 2, pp. 741-744, Honolulu, HI, USA, April 2007.
[PDF Preprint (375kB), BibTeX+Abstract, published paper]
[C4] Anders M. Johansson, Eric A. Lehmann, and Sven Nordholm, Real-time Implementation of a Particle Filter with Integrated Voice Activity Detector for Acoustic Speaker Tracking, Proceedings of the IEEE Asia Pacific Conference on Circuits and Systems (APCCAS'06), pp. 1004-1007, Singapore, December 2006.
[PDF Preprint (127kB), BibTeX+Abstract, supplementary material, published paper]
Cross-ref.: see also [J3], [C3], and [R2] for related work.
[C3] Eric A. Lehmann and Anders M. Johansson, Experimental Performance Assessment of a Particle Filter with Voice Activity Data Fusion for Acoustic Speaker Tracking, Proceedings of the IEEE Nordic Signal Processing Symposium (NORSIG'06), pp. 126-129, Reykjavik, Iceland, June 2006.
[PDF Preprint (154kB), BibTeX+Abstract, published paper]
Cross-ref.: see also [J3], [C4] and [R2] for related work.
[C2] Eric A. Lehmann, Particle Filtering Approach to Adaptive Time-Delay Estimation, Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'06), vol. 4, pp. 1129-1132, Toulouse, France, May 2006.
[PDF Preprint (110kB), BibTeX+Abstract, published paper]
[C1] Eric A. Lehmann, Darren B. Ward, and Robert C. Williamson, Experimental Comparison of Particle Filtering Algorithms for Acoustic Source Localization in a Reverberant Room, Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'03), vol. 5, pp. 177-180, Hong Kong, China, April 2003.
[PDF Preprint (140kB), BibTeX+Abstract, published paper]
Note: due to the cancelation of ICASSP'03 following the SARS epidemic, this paper was presented at the IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA'03), New Paltz, New York, October 2003.
Cross-ref.: see also [J1] for related work.

Non-refereed conference and workshop papers
[N12] T. Malthus, E. A. Lehmann, X. Ho, S. Gensemer, J. Anstee, E. Botha, J. Brayan, L. Bowling, M. Shaikh, R. Ohmsen, B. Newcombe, An algal bloom early warning system for NSW using satellite and near-surface observations, Ozwater Conference, Sydney, Australia, May 2017.
[N11] E. A. Lehmann, Z.-S. Zhou, P. Caccetta, A. Milne, A. Mitchell, K. Lowell and A. Held, Forest mapping and monitoring in Tasmania using multi-temporal Landsat and ALOS-PALSAR data, IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2012), pp. 6431-6434, Munich, Germany, July 2012.
[PDF Preprint (1.2MB), BibTeX+Abstract, published paper]
[N10] K. Lowell, A. Held, T. Milne, A. Mitchell, I. Tapley, P. Caccetta, E. Lehmann and Z.-S. Zhou, Areal sample units for accuracy evaluation of single-date and multi-temporal image classifications, International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences (Accuracy 2012), pp. 7-12, Florianópolis, SC, Brazil, July 2012.
[published paper]
[N9] Z.-S. Zhou, P. Caccetta, E. Lehmann, S. McNeill, A. Mitchell, A. Milne, I. Tapley and K. Lowell, Dual Polarised Entropy/Alpha Decomposition and Coherence Optimisation for Improved Forest Biomass Mapping, IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2011), pp. 3951-3954, Vancouver, Canada, July 2011.
[published paper]
[N8] A. L. Mitchell, T. Milne, I. Tapley, K. Lowell, P. Caccetta, E. Lehmann, Z.-S. Zhou and A. Held, Interoperability of Radar and Optical Data for Forest Information Assessment, IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2011), pp. 1397-1400, Vancouver, Canada, July 2011.
[published paper]
[N7] E. Lehmann, P. Caccetta, Z.-S. Zhou, A. Mitchell, I. Tapley, A. Milne, A. Held, K. Lowell, and S. McNeill, Forest Discrimination Analysis of Combined Landsat and ALOS-PALSAR Data, 34th International Symposium on Remote Sensing of Environment (ISRSE 2011), Sydney, Australia, April 2011.
[PDF Preprint (1.8MB), BibTeX+Abstract, published paper]
[N6] Z.-S. Zhou, E. Lehmann, X. Wu, P. Caccetta, S. McNeill, A. Mitchell, A. Milne, I. Tapley, and K. Lowell, Terrain Slope Correction and Precise Registration of SAR Data for Forest Mapping and Monitoring, 34th International Symposium on Remote Sensing of Environment (ISRSE 2011), Sydney, Australia, April 2011.
[published paper]
[N5] A. L. Mitchell, A. Milne, I. Tapley, K. Lowell, P. Caccetta, E. Lehmann, Z.-S. Zhou, and A. Held, Key Outcomes of the Tasmania 'National Demonstrator': A Project for the GEO Forest Carbon Tracking Task, 34th International Symposium on Remote Sensing of Environment (ISRSE 2011), Sydney, Australia, April 2011.
[published paper]
[N4] K. Lowell, A. Mitchell, I. Tapley, A. Milne, E. Lehmann, Z.-S. Zhou, P. Cacetta, and A. Held, Evaluating and Characterising Image Classification Interoperability, 34th International Symposium on Remote Sensing of Environment (ISRSE 2011), Sydney, Australia, April 2011.
[published paper]
[N3] Anthea L. Mitchell, Tony Milne, Ian Tapley, Kim Lowell, Peter Caccetta, Eric Lehmann, and Zheng-Shu Zhou, Wall-to-Wall Mapping of Forest Extent and Change in Tasmania using ALOS Palsar Data, IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2010), pp. 1230-1233, Honolulu, Hawaii, July 2010.
[published paper]
[N2] Zheng-Shu Zhou, Eric Lehmann, Peter Caccetta, and Stephen McNeill, Use of ALOS-PALSAR Data Associated with Landsat Imagery for Precise Forest Mapping: Tasmanian Pilot, European Conference on Synthetic Aperture Radar (EUSAR 2010), pp. 98-101, Aachen, Germany, June 2010.
[published paper]
[N1] Suzanne L. Furby, Peter A. Caccetta, Jeremy F. Wallace, Eric A. Lehmann, and Katherine Zdunic, Recent Development in Vegetation Monitoring Products from Australia’s National Carbon Accounting System, Proceedings of the IEEE International Geoscience & Remote Sensing Symposium (IGARSS 2009), vol. IV, pp. 276-279, Cape Town, South Africa, July 2009.
[published paper]

Non-refereed conference and workshop presentations: oral and poster presentations that did not result in a full paper (usually based on an extended abstract only).
[P18] E. Lehmann, A. Phatak, A. Stephenson, Spatial modelling framework for the estimation of rainfall intensity-frequency-duration relationships under climate change, Australian Meteorological and Oceanographic Society (AMOS) Conference, Canberra, Australia, 7-10 February 2017.
[P17] T. Malthus, E. Lehmann, X. Ho, J. Anstee, E. Botha, J. Brayan, L. Bowling, M. Shaikh, Algal bloom monitoring system for New South Wales using remote sensing data, Surveying and Spatial Sciences Institute’s NSW/ACT Regional Conference 2016 "Geo-Enabling our Community", Canberra, Australia, 24-25 November 2016.
[P16] J. Anstee, T. Malthus, E. Botha, E. Lehmann, X. Ho, K. Joehnk, N. Cherukuru, and A. Dekker, Systematic analysis of inland water quality using datacube concepts, 16th World Lake Conference, Bali, Indonesia, 7-11 November 2016.
[P15] T. Malthus, E. Lehmann, X. Ho, J. Anstee, H. Botha, J. Brayan, L. Bowling, M. Shaikh, Development of a satellite based algal bloom alert early warning system, Moreton Bay and Catchment Forum, Brisbane, Australia, 1-3 November 2016.
[P14] T. Malthus, E. Lehmann, X. Ho, J. Anstee, H. Botha, J. Brayan, L. Bowling, M. Shaikh, A satellite-based algal bloom early warning system for NSW: Exploiting a free data source to address a monitoring challenge, 5th National Cyanobacteria Workshop, Brisbane, Australia, 29-30 September 2016.
[P13] T. Malthus, J. Anstee, E. Botha, J. Brayan, L. Bowling, M. Shaikh, E. Lehmann, X. Ho, E. Hestir, and A. Dekker, Earth observation based technologies to assist algal management in rivers and lakes, European Space Agency Living Planet Symposium, Prague, Czech Republic, 9-13 May 2016.
[P12] T. Harwood, F. Dickson, M. Doherty, R. Donohue, S. Ferrier, E. Lehmann, T. McVicar, G. Newell, R. Storey, M. White and K. Williams, HCAS: Developing a nationally consistent assessment of natural habitats for biodiversity using remote sensing data, Ecological Society of Australia (ESA) Annual Conference, Adelaide SA, Australia, November 2015.
[P11] S. Soltyk and E. Lehmann, Spatial modelling of extreme rainfall, Western-Australian Young Statisticians’ Workshop, Perth, Australia, October 2013.
[P10] A. Phatak, M. Palmer, E. A. Lehmann and K. W. Lau, Spatial modelling of rainfall intensity-frequency-duration curves, Joint Statistical Meetings of the American Statistical Association, Montréal, Québec, Canada, August 2013.
[P9] G. Chiu and E. Lehmann, Bayesian hierarchical modelling: incorporating spatial information in the AWRA inference framework, The International Environmetrics Society (TIES) Conference, Hyderabad, India, January 2012.
[P8] G. Chiu and E. Lehmann, Making use of multiple soil moisture products through spatial modelling, The International Environmetrics Society (TIES) Conference, Hyderabad, India, January 2012.
[P7] T. Milne, A. Mitchell, I. Tapley, K. Lowell, P. Caccetta, E. Lehmann and Z.-S. Zhou, Assessment of forest information derived from the interoperability of radar and optical data, International Asia-Pacific Conference on Synthetic Aperture Radar (APSAR), Seoul, South Korea, September 2011.
[P6] A. Mitchell, A. Milne, I. Tapley, K. Lowell, E. Lehmann, Z.-S. Zhou and P. Caccetta, Forest information monitoring in Tasmania using synthetic aperture radar data, International Symposium on Digital Earth (ISDE7), Perth, Australia, August 2011.
[P5] G. Chiu and E. Lehmann, Bayesian hierarchical modelling: incorporating spatial information in the AWRA framework, WIRADA Science Symposium, Melbourne, Australia, August 2011.
[P4] E. Lehmann, Z.-S. Zhou, P. Caccetta, X. Wu and A. Held, Forest discrimination analysis and joint processing of Landsat and ALOS-PALSAR data for forest mapping and monitoring, Divisional Conference for CSIRO Mathematics, Informatics and Statistics, Gold Coast, Australia, March 2011.
[P3] Anthea L. Mitchell, Tony Milne, Ian Tapley, Kim Lowell, Peter Caccetta, Eric Lehmann, Zheng-Shu Zhou, and Alex Held, Mapping of Forest Extent and Change in Tasmania using ALOS Palsar Data in Support of the GEO Forest Carbon Tracking, European Space Agency Living Planet Symposium, Bergen, Norway, June-July 2010.
[P2] Z.-S. Zhou, E. A. Lehmann, P. A. Caccetta, A. L. Mitchell, T. Milne, and I. Tapley, Experiments in Radar-Optical Forest Monitoring: Tasmanian Pilot, Workshop on Progress in Radar Research (PIRR 2010), Adelaide, Australia, April 2010.
[P1] Eric A. Lehmann and Robert C. Williamson, Importance Sampling Particle Filter for Robust Acoustic Source Localisation and Tracking in Reverberant Environments, Joint Workshop on Hands-Free Speech Communication and Microphone Arrays (HSCMA'05), Rutgers University, Piscataway, New Jersey, USA, March 17-18 2005.
[PDF Preprint (120kB), BibTeX]
Cross-ref.: see also [J2] for related work.

Technical and client reports (internally reviewed)
[R20] N. Sims, J. Anstee, O. Barron, E. Botha, L. Li, E. Lehmann, T. McVicar, M. Paget, C. Ticehurst, T. Van Niel, and G. Warren, Earth observation remote sensing: A technical report from the CSIRO Northern Australia Water Resource Assessment to the Government of Australia, A technical report to the Australian Government from the CSIRO Northern Australia Water Resource Assessment, part of the National Water Infrastructure Development Fund, CSIRO, Australia, 2018.
[R19] E. A. Lehmann, S. Foster, B. Henderson, W. Jin, P. Kokic, T. Harwood, S. Ferrier, K. Williams, HCAS Activity 3a(1): Environmental Space Modelling - Methods Document, Technical Report, CSIRO, Australia, June 2017.
[R18] E. A. Lehmann, T. J. Malthus, X. Ho, J. Anstee, and E. Botha, Early warning system for harmful algal blooms: Report on Work Package 3 - Satellite sensing: moving toward operationalisation, CSIRO Land and Water Client Report, Australia, January 2017.
[R17] B. Bates, J. Evans, J. Green, A. Griesser, D. Jakob, R. Lau, E. Lehmann, M. Leonard, A. Phatak, T. Rafter, A. Seed, S. Westra and F. Zheng, Australian Rainfall and Runoff Revision Project 1: Development of intensity-frequency-duration information across Australia – Climate change research plan project, Stage 3 report, CSIRO Client Report EP154680 to Engineers Australia, June 2015.
Also appears as: Engineers Australia ARR Report Number P1/S3/001, December 2015, ISBN 978-085825-8665.
[published report]
[R16] A. Phatak, E. Lehmann and K.-W. Lau, Climate Change and IFD Curves: Progress Report, CSIRO Client Report to Engineers Australia, December 2014, 20 pages.
[R15] K. W. Lau, J. Chia, A. Phatak and E. Lehmann, Areal rainfall and spatial extremes, CSIRO Technical Report EP147328, CSIRO, Australia, August 2014.
[R14] A. Phatak, E. Lehmann and K.-W. Lau, Spatial Modelling of IFD Curves: Progress Report, Client Report EP145744 to Engineers Australia, CSIRO, Australia, May 2014, 86 pages.
[R13] E.A. Lehmann, T.R. McVicar, G.S. Chiu, I.V. Emelyanova, T.G. Van Niel, K.S. Bakar and B.L. Henderson, Blending Methodologies for Multiple Earth Observation Products: Activity Report to CSIRO’s Earth Observation Informatics Transformational Capability Platform, EOI TCP Client Report EP138192, CSIRO, Australia, July 2013, 34 pages.
[published report]
[R12] K. Lowell, A. Mitchell, T. Milne, I. Tapley, A. Held, P. Caccetta, E. Lehmann, Z.-S. Zhou, Verification, continuous improvement and reporting methods for national demonstrators, IFCI client report (Volume IV), Sept. 2012.
[published report]
[R11] K. Lowell, A. Mitchell, T. Milne, I. Tapley, A. Held, P. Caccetta, E. Lehmann, Z.-S. Zhou, GEO Forest Carbon Tracking, Tasmania National Demonstrator: Overview of quality assurance concepts for image processing in national carbon accounting systems, IFCI client report (Volume III), Sept. 2012.
[published report]
[R10] A. Mitchell, I. Tapley, A. Milne, M. Williams, K. Lowell, P. Caccetta, E. Lehmann, Z.-S. Zhou, and A. Held, GEO Forest Carbon Tracking, Tasmania National Demonstrator: RADAR processing methodologies for the generation of forest information products, IFCI client report (Volume II), Sept. 2012.
[published report]
[R9] A. Mitchell, I. Tapley, A. Milne, M. Williams, K. Lowell, P. Caccetta, E. Lehmann, Z.-S. Zhou, and A. Held, GEO Forest Carbon Tracking, Tasmania National Demonstrator: radar processing methodologies for the generation of wall-to-wall mosaics, IFCI client report (Volume I), Sept. 2012.
[published report]
[R8] R. Lagerstrom, M. Berman, G. Stone, A. Traylen and E. Lehmann, Unmixing a time series of Landsat Thematic Mapper images of Tasmania, CSIRO Technical Report EP114256, June 2011.
[R7] B. Henderson, G. Chiu, W. Jin, E. Lehmann, and S. Barry, AWRA model-data fusion: Evaluation, error characterisation and blending, Client Report, CSIRO Water for a Healthy Country Flagship, 2011.
[R6] B. Henderson, L. Renzullo, A. van Dijk, S. Barry, G. Chiu, B. Gouweleeuw, W. Jin, E. Lehmann, J. Lerat, Z. Paydar, M. Stenson, Road map for AWRA-L model-data fusion, Client Report, CSIRO Water for a Health Country Flagship, 2011.
[R5] S. L. Furby, K. Zdunic, and E. Lehmann, Monitoring Woody Vegetation Trends: NCAS Trends Product Version 1.0, CSIRO MIS Technical Report 2008/140, 2008.
[R4] Eric A. Lehmann and Anders M. Johansson, Prediction of Energy Decay in Room Impulse Responses Simulated with the Image Source Model, NICTA/WATRI Technical Report PRJ-NICTA-PM-025, Western Australian Telecommunications Research Institute, Perth, Australia, June 2008.
[PDF (750kB), BibTeX+Abstract, supplementary material]
Cross-ref.: this work was published in [C7] and [J4].
[R3] Eric A. Lehmann and Anders M. Johansson, Dynamics Models for Acoustic Speaker Tracking—Preliminary Results, NICTA/WATRI Technical Report PRJ-NICTA-PM-023, Western Australian Telecommunications Research Institute, Perth, Australia, August 2007.
[PDF (510kB), BibTeX+Abstract]
Cross-ref.: this work was published in [C6].
[R2] Eric A. Lehmann and Anders M. Johansson, Particle Filter with Integrated Voice Activity Detection for Acoustic Source Tracking, NICTA/WATRI Technical Report PRJ-NICTA-PM-008, Western Australian Telecommunications Research Institute, Perth, Australia, December 2006.
[PDF (550kB), BibTeX+Abstract]
Cross-ref.: this work was published in [J3], [C3] and [C4].
[R1] Eric A. Lehmann and Robert C. Williamson, Posterior Cramér-Rao Bound for Acoustic Source Tracking in Reverberant Environments, NICTA Technical Report ISSN 1833-9646, National ICT Australia, Canberra, Australia, December 2006.
[PDF (390kB), BibTeX+Abstract]

Copyright: This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. Copyright notice for IEEE publications: ©20XX IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. Copyright notice for JASA publications: ©20XX American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.



Other links of (potential) interest Back to top
  • Visit the other version of this website, with lots more stuff to be found there including:
    • Matlab code for image method simulation of small room acoustics
    • Slides of my poster and seminar presentations
    • Demonstration movies of acoustic source localisation and tracking results
    • Personal photos, etc.


Last update: Aug. 2017. Maintained by Eric Lehmann -- Please send any comments to the above mentioned address. visitors since July 06.