Random Thoughts

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Biography

Emmanuel Christophe was born in France in 1980. He received both his Engineering degree in Telecommunications (ENST Bretagne) and DEA (University of Rennes 1) in Telecommunications and image processing with honors in 2003. He worked six months for the National University of Singapore on CWAIP lab on video compression. In October 2006, he received the PhD degree from Supaero in hyperspectral image compression and image quality for his work in TeSA in cooperation with Centre National d’Etudes Spatiales (CNES), Office National d’Etudes et de Recherches Aérospatiales (ONERA) and Alcatel Space. He has been a visiting scholar in 2006 at Rensselaer Polytechnic Institute, Troy, NY, USA. He is now a research engineer at CNES. His research interests include image and video compression, quality assessment, as well as technologies for remote sensing.

Research activities

• PhD on hyperspectral image compression.
• Participation to the ACI2M project: massive data processing involving several laboratories.
• Member of the GdR-ISIS: french research structure on information, signal, images and vision.
• Member of the IEEE Society.
• Volunteer for the organization of ICASSP 2006, Toulouse, May 2006.
• Actively involved in Orfeo Toolbox (OTB, OTB Live)

Teaching

• Insa Toulouse: Satellite image compression for 4th year students (download course).
• Enseeiht: Introduction to signal processing and spectral analysis.
• Ensica: Digital filtering.
• Cnam: Course on signal and noise.

Interest

• Compression: images and video (Jpeg2000, Mpeg4), lossy and lossless.
• Remote sensing and space exploration (participation to the Spacecraft Techniques and Technology course from CNES in June 2005).
• Wavelets theory and practice (participation to the Wavelet And Multifractal Analysis summer school in July 2004).
• Computer stuff: linux, latex, python.
• More recently, I’ve been diving into the world of geolocation and open source mapping
• And… traveling around the world.

Selected publications

Academic Journals

1. Emmanuel Christophe, Pierre Duhamel, Corinne Mailhes. Adaptation of zerotrees using signed binary digit representations for 3 dimensional image coding. EURASIP Journal on Image and Video Processing, 2007.
2. Emmanuel Christophe, Dominique Léger, Corinne Mailhes. Quality Criteria Benchmark for Hyperspectral Imagery. IEEE Transactions on Geoscience and Remote Sensing, 43(9):2103-2114, September 2005.

International Conferences

1. Emmanuel Christophe, Jordi Inglada. Robust Road Extraction for High Resolution Satellite Images. In IEEE International Conference on Image Processing, ICIP’07, September 2007.
2. Carole Thiebaut, Emmanuel Christophe, Dimitri Lebedeff, Christophe Latry. CNES Studies of On-Board Compression for Multispectral and Hyperspectral Images. In Satellite Data Compression, Communications, and Archiving III, Volume 6683, Pages 0-0, August 2007.
3. Emmanuel Christophe, Pierre Duhamel, Corinne Mailhes. Signed Binary Digit Representation to Simplify 3D-EZW. In IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP’07, April 2007.
4. Emmanuel Christophe, William A. Pearlman. Three-dimensional SPIHT Coding of Hyperspectral Images with Random Access and Resolution Scalability. In Fortieth Annual Asilomar Conference on Signals, Systems, and Computers, October 2006.
5. Emmanuel Christophe, Corinne Mailhes, Pierre Duhamel. Best Anisotropic 3-D wavelet decomposition in a rate-distortion sense. In IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP’06, Volume 2, Pages 0-17, May 2006.
6. Emmanuel Christophe, Dominique Léger, Corinne Mailhes. Comparison and evaluation of quality criteria for hyperspectral imagery. In Image Quality and System Performance II, Volume 5668, Pages 204-213, January 2005.

National Conferences and Workshops

1. Emmanuel Christophe, Corinne Mailhes, Pierre Duhamel. Décorrelation des images hyperspectrales avec une décomposition 3D en ondelettes. In Workshop on Transform Based on Independent Component Analysis for Audio, Video and Hyperspectral Images Data Reduction and Coding, July 2006.
2. Emmanuel Christophe, Dominique Léger, Corinne Mailhes. Images hyperspectrales et critères qualité. In Colloque annuel des Doctorants EDIT’05, Pages 132-136, April 2005.

Thesis

1. Emmanuel Christophe. Compression des images hyperspectrales et son impact sur la qualité des données. PhD Thesis École Nationale Supérieure de l’Aéronautique et de l’Espace, October 2006.