Prof. Dr. Zhichun Lei

Since August 2011
Professor at Hochschule Ruhr West (Field of Expertise: Signal and Image Processing)

May 2001 – June 2011
Engineer and Senior Engineer (from 1 October 2007) at Sony’s Stuttgart Technology Centre

November 1998 – May 2001
Research Associate at Philips Research Laboratories, Aachen

April 1994 – October 1998
Doctorate (Dr.-Ing.) at the Chair of Communications Engineering, Information Processing Circuits Group (Prof. Dr H. Schröder), University of Dortmund

November 1993 – March 1994
Attended German language course at the Goethe-Institut, Mannheim

August 1993 – November 1993
Research Associate, Faculty of Electrical Engineering, Tianjin University, China

August 1992 – July 1993
Attended German language course at the German College, Tongji University, Shanghai, China

March 1989 – August 1992
Research Associate, Faculty of Electrical Engineering, Tianjin University, China

Additional Activities

• Second Professorship at the School of Microelectronics, Tianjin University, China
• Mentor for the Friedrich Ebert Foundation

• Fundamentals of Image Processing
• Fundamentals of Signal Processing
• Fundamentals of Computer Science and Programming Languages
• Industrial Signal Processing
• Industrial Imaging and Image Processing

Selected Journal and Conference Papers

Book and Book Chapters (in reverse chronological order):

• Zhichun Lei, Xin Yu, Markus Strobel, “High-Dynamic-Range and Wide Color Gamut Video,“ in NANO-CHIPS 2030: On-Chip AI for an Efficient Data-Driven World, Springer International Publishing, ISBN-10: 3030183378, ISBN-13: 978-3030183370, June 2020
• Zhichun Lei, “Kantenadaptive Verfahren zur Verbesserung der Bildschaerfe,“ Kapitel 11 für das Buch Mehrdimensionale Signalverarbeitung von Prof. Dr.-Ing. Hartmut Schroeder, Band II, B.G. Teubner Verlag, Stuttgart, ISBN 3-519-06197-X, 2000
• Zhichun Lei, “Blinde Echoentzerrung zum Empfang von Videosignalen,” Shaker Verlag, ISBN 3-8265-7943-7, Dissertation der Universitaet Dortmund, 2000

Patents (in reverse chronological order):

1. Zhichun Lei, “Method for Edge-based Multi Rate Image Sharpness Enhancement”, patent number:US 7,856,151, granted on 21/12/2010
2. Zhichun Lei, “Adaptive Histogram Equalization for Images with Strong Local Contrast”, patent number:US 7,822,272, granted on 26/10/2010
3. Zhichun Lei, “Method for Processing Digital Image Data”, patent number: EP 1 821 257, granted  on 04/08/2010
4. Zhichun Lei, Christian Unruh, “Method for Classifying a Signal”, patent number: EP 1 821 417, granted on 30/12/2009
5. Zhichun Lei, Piergiorgio Sartor, Yalcin Inescu, Peter Wagner: “Contrast Enhancement for Digital Images”, patent number: US 7,102,697, granted on 05/09/2006; patent number: JP 4 339 611, granted on 10/07/2009
6. Zhichun Lei: “Correction of Non-uniform Image Display”, patent number: US 7,365,800, granted on 29/04/2008
7. Hartmut Schröder, Zhichun Lei: "Verfahren zur Entzerrung eines Farbfernsehsignals", Patentnummer: DE 198 39 644, erteilt am 15.2.2001.

Publications (in reverse chronological order)

1. A. Pare, S. Zhang, Z. Lei,  "Multipath Interference Suppression in Time-of-Flight Sensors by Exploiting the Amplitude Envelope of the Transmission Signal," IEEE Access, September 2020.
2. L. Duan, K. Debattista, Z. Lei, A. Chalmers, “Subjective and Objective Evaluation of Local Dimming Algorithms for HDR Images,” IEEE Access, vol. 8, Issue 1, 2020.
3. H. Li, H. Gao, G. Kirca and Z. Lei, "Energy-Saving Display by Color Pixel Re-representation," IEEE Transactions on Circuits and Systems for Video Technology, December 2020.
4. T. Zhang  Y. Wang  H. Wu, M. Li, Z. Lei, “High-Performance Local Dimming Algorithm Based on Image Characteristic and Logarithmic Function,” Journal of the Society for Information, November 2018.
5. T. Zhang, X. Zhao, X. Pan, X. Li, Z. Lei, “Optimal Local Dimming Based on an Improved Shuffled Frog Leaping Algorithm,” IEEE Access, July 2018.
6. T. Zhang, H. Wang, Y. Chen, Q. Liu, M. Li, Z. Lei, “A rapid local backlight dimming method for interlaced scanning video,” Journal of the Society for Information, vol. 26, issue 7, July 2018.
7. L. Duan, Z. Lei, “Wide Color Gamut Display with White and Emerald Backlighting,” Applied Optics, Vol. 57, No. 6, Feb. 2018.
8. T. Zhang, H. Jiao, Z. Lei, “Individual-Activation-Factor Memory Proportionate Affine Projection Algorithm With Evolving Regularization,” IEEE Access, March 2017.
9. T. Zhang, X. Zhao, X. An, H. Quan, Z. Lei, “Using Blind Optimization Algorithm for Hardware/Software Partitioning,” IEEE Access, Feb. 2017.
10. M. Xiao, G. Sun, X. Li, Z. Lei, “The Equivalent Circuit Modeling and Application in Band-Pass Filter of Spiral-Shaped Defect Ground Structure,” Microwave and Optical Technology Letters, Feb. 2016.
11. Z. Lei, O. Franzen, J. Brakensiek, H. Schröder, “Constant Modulus Algorithm for blind Equalisation of Multipath Transmitted Video Signals,” Signal Processing: IMAGE COMMUNICATION, 2001, Vol. 16, No. 5, pp. 413-420.
12. Z. Lei, H. Schröder, "Adaptive Equalisation of Multipath Interference for Mobile Video Signal Reception," IEEE Trans. on Broadcasting, 1998, Vol. 44, No. 2, pp. 172-181.
13. Z. Lei, P. Appelhans, H. Schröder, “Image Processing Techniques for Blind TV Ghost Cancellation,” Proceedings of IEEE 1997 International Conference on Acoustics, Speech, and Signal Processing (ICASSP 97), 1997, Munich, Vol. 4, pp. 2561-2564.