B.Sc.(CUHK) M.Phil.(CUHK) Ph.D.(CUHK)
Chi-Sing
Leung has been working on
image-based rendering and neural networks for
10 years. He has published over 50 international journal papers and 4 book
chapters. He received the IEEE Transactions
on Multimedia 2005 Prize Paper Award for the paper titled, “The Plenoptic Illumination Function” in IEEE Trans. on Multimedia, Vol. 4, Issue
3, September, 2002.
He proposed a two-level compression method for illumination adjustable images and the
corresponding real-time rendering methods. He has written several game development related articles in
“Shader X3” and
“Shader X4”. Since 2000, he has been providing
programming consultancy services to Development Bank of
Phone: (852)-2788 7378 Email: eeleungc@cityu.edu.hk
Course Page
Research Interests
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1.
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Liang Wan+, Tien-Tsin Wong, and Chi-Sing Leung, “Isocube: Exploiting the Cubemap
Hardware,” IEEE Transactions on Visualization and Computer Graphics, vol. 13, 2007, pp. 720-731. |
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2.
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P.M. Lam+, C.S. Leung, and T.T. Wong, “Noise-resistant fitting for spherical harmonics,” IEEE Transactions on Visualization and Computer Graphics, vol. 12, 2006, pp. 254-265. |
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3.
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C.S. Leung, T.T. Wong, P.M. Lam+, and K.H. Choy+, “An
RBF-based image compression method for image-based rendering", IEEE Transactions on Image Processing, vol. 15, 2006, pp. 1031-1041. |
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4.
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P.M. Ho+, T.T. Wong, and C.S. Leung, “Compressing the illumination-adjustable images with
principal component analysis,” IEEE
Transactions on Circuits and Systems for Video Technology, March 2005,
pp. 355-364. |
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5.
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T.T.
Wong, and C.S. Leung, “Compression of illumination adjustable
image,” IEEE
Transactions on Circuits and Systems for Video Technology, vol. 13,
Nov. 2003, pp. 1107 -1118. |
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6.
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T.T. Wong, C.S. Leung, P.A. Heng, J.
Wang, “Discrete Wavelet Transform on Consumer-Level Graphics
Hardware,” IEEE Transactions on Multimedia. Vol. 9, No. 3, April 2007, pp. 668-673. |
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7.
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T.T.Wong, C.W. Fu+, P.A. Heng,
C.S. Leung, “The
plenoptic-illumination function,” IEEE
Transactions on Multimedia, vol. 3, 2002, pp. 361-371. (IEEE Transactions on
Multimedia 2005 Prize Paper Award) |
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8.
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C.S. Leung, “Optimum learning for bidirectional associative
memory in the sense of
capacity,” IEEE Transactions on Systems, Man, and Cybernetics, vol.24, 1994, pp.791-796. |
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9.
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C.S. Leung, L.W. Chan, and Edmund Lai, “Stability, capacity, and statistical dynamics of second-order bidirectional associative memory,” IEEE Transactions on Systems, Man, and Cybernetics, vol.25, 1995, pp.1414-1423. |
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10. |
C.S. Leung, “Encoding method for bidirectional associative memory using
projection on convex sets,” IEEE Transactions on Neural Networks, vol.4, 1993, pp.879-881. |
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11. |
C.S.Leung and John Sum+, “A fault tolerant regularizer for RBF networks,” IEEE Transactions on Neural Networks (accepted). |
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12. |
C.S. Leung, L.W. Chan, and Edmund Lai, “Stability
and statistical properties of
second-order bidirectional associative memory,” IEEE Transactions on Neural Networks, vol.8, 1997, pp.267-277. |
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13. |
J. Sum+,
Chi Sing Leung, L.W. Chan, L. Xu, “Yet
another algorithm which can generate topography map,” IEEE Transactions on
Neural Networks, Vol. 8, 1997, pp. 1204-1207. |
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14. |
C.S. Leung and L.W. Chan,
“Transmission of vector quantization data over a noisy channel,” IEEE Transactions on
Neural Networks, vol.8, 1997, pp.582-589. |
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15. |
John Sum+, C.S. Leung, P.K.S. Tam, G.H. Young, W.K. Kan, and L.W.
Chan, “Analysis for a
class of WTA model,” IEEE Transactions on Neural Networks,
vol.10 1999, pp.64-71. |
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16. |
IEEE Transactions on
Neural Networks, vol.10, 1999, pp.161-165. |
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17. |
C.S. Leung, G.H. Young, John
Sum+, and W.K. Kan, “On the
regularization of forgetting recursive least square,” |
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18. |
C.S. Leung, A.C. Tsoi, and L.W. Chan “Two regularizers for RLS algorithms in feedforward multilayered neural networks,” IEEE Transactions on Neural Networks, vol. 12, 2001, pp. 1314-1332. |
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19. |
Yong Xu+, K.W. Wong, and C.S. Leung, “Generalized
RLS Approach to the Training of Neural Networks,” IEEE Transactions on Neural Networks, vol. 17, 2006, pp. 19-34. |
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20. |
C.S. Leung and L.W. Chan, “An error control scheme for the transmission of vector quantized data over noisy channels,” IEEE Transactions on
Signal Processing, vol.40, 1998,
pp.2767-2780. |
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21. |
John Sum+, Hong Shen, C.S. Leung, and G.H. Young, “Analysis on a mobile agent based algorithm for network routing and management,” IEEE Transactions on
Parallel and Distributed Systems, vol.14, 2003, pp. 192-202. |
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22. |
Sen Jiang+, P. Li, Hong Sun, and
C.S.Leung, “Modified
LMMSE Turbo
Equalization,” IEEE Communications
Letters, vol. |
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23. |
C.S. Leung and L.W. Chan, “The behaviour
of forgetting learning in bidirectional associative memory,” Neural Computation, vol.9, 1997,
pp.385-402. |
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24. |
John Sum+, L.W. Chan, C.S. Leung, G.
Young, “Extended kalman filter based pruning
method for recurrent neural networks,” Neural Computation, vol.10, 1998, pp.1481-1505. |
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25. |
John Sum+, C.S. Leung, L.W. Chan, W.K.
Kan, and G. Young, “An adaptive Bayesain
pruning for neural network in nonstationary
environment,” Neural Computation, vol. 11, 1999, pp. 965-976. |
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26. |
C.S. Leung and L.W. Chan, “Design
of trellis vetor quantizers
using Kohonen maps,” Neural Networks, vol. 12, 1999, pp. 907-914. |
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27. |
C.S. Leung, K.W. Wong, John Sum+, and
L.W. Chan, “A pruning method for recursive least square
algorithm,” Neural Networks,vol. 14, 2001, pp. 147-174. |
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28. |
C.S. Leung and L.W. Chan, “Dual extended Kalman
filtering algorithm in recurrent
neural networks,” Neural Networks, vol. 16, 2003, pp. 223-239. |
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29. |
Ze Wang+, C.S.
Leung, Y.S. Zhu and T.T. Wong, “Data Compression with spherical wavelets and Wavelets for
the Image-Based Relighting,” Computer Vision and Image Understanding, vol. 96, Dec, 2004, pp. 327-344. |
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30. |
Ze Wang+, C.S.
Leung, T. T. Wong, and Y.S. Zhu, “Eigen-image
based compression for the image-based relighting with cascade RLS
networks,” Pattern Recognition, vol. 37,
2004, pp. 1219-1231. |
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31. |
Ping-Man
Lam+ Tze-Yui Ho+, Chi-Sing Leung , and Tien-Tsin Wong, “Noise-proofing
the doubly SH-projected coefficients for synthesizing
images under environment lighting,” Signal Processing: Image
Communications. (accepted). |
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32. |
T.Y. Ho+, P.M. Lam+, C.S. Leung, and T.T. Wong,
“GPU-friendly rendering for illumination adjustable images,” Signal Processing: Image Communications. (accepted). |
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33. |
P.M. Lam+, C.S. Leung, and T.T. Wong, “A compression method for a massive image data set in image
based rendering,” Signal Processing: Image Communications, vol. 19, Issue 8, Sept, 2004, pp. 741-754. |
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34. |
Ze Wang+, C.S.
Leung, Y.S. Zhu and T.T. Wong, “Data compression on the illumination
adjustable images by PCA and Signal Processing: Image Communications, vol. 19, Nov, 2004, pp. 939-954. |
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35. |
X. Liao+, K.W. Wong, C.S. Leung, and Z. Wu, “Hopf bifurcation and chaos in a single delayed neuron
equation with non-monotonic activation function,” Chaos, Solitons & Fractals, vol. 12, 2001, pp.
1535-1547. |
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36. |
C.S. Leung, K.W. Wong and A.C. Tsoi, “Recursive
algorithms for principal component extraction,” Network: Computation in Neural Systems, vol.8, 1997, pp.323-334. |
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37. |
C.S. Leung, K.W. Wong, John Sum+, and L.W. Chan, “On-line
training and pruning for RLS algorithms,” Electronics Letters,
vol.32, 1996, pp.2152-2153. |
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38. |
“Recursive least squares approach to combining principal and
minor components analyses,” Electronics Letters,
1998, vol. 34, pp.1074-1076. |
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39. |
S.J. Chang+, K.W. Wong, and C.S. Leung, “Periodic activation function for fast
on-line EKF training and pruning,” Electronics Letters,
vol. 34, 1998, pp.2255-2256. |
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40. |
S. J.
Chang+, John Sum, K, W. Wong and C.S.Leung,
“Adaptive training and pruning in feedforward
networks” Electronics
Letters, vol.
37, 2001, pp. 106 –107. |
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41. |
Sen Jiang+,B.M. Bai,+
C.S. Leung, Ping Li, and Hong Sun,
“TTCM Schemes based on the time-varying trellis approach,” Electronics Letters, vol. 38,
2002, pp. 1694-1696. |
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42. |
C.S. Leung, Herbert Chan+, and W.H. Mow, “Soft-Decoding SOM
for VQ Over Wireless Channels,” Neural Processing Letters, vol.
24, 2006, pp. 179–192. |
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43. |
K.W. Wong and C.S. Leung, “On-line successive synthesis of
wavelet networks,” Neural Processing Letters, vol.7, 1998, pp.91-100. |
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44. |
“A practical sequential method for principal component
analysis,” Neural Processing Letters, vol.
11, 2000, pp. 107-112. |
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45. |
S. J.
Chang+, K, W. Wong and C.S.Leung, “Combining
DEKF algorithm and trace rule for fast on-line invariance extraction and
recognition,” Pattern Recognition Letters, vol. 21, 2001, pp. 493-501. |
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46. |
Ze Wang+, Y. Lee,
Pattern
Recognition Letters, vol. 24, 2003, pp. 1405-1415. |
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47. |
Ze Wang+, Y. Lee, C.S Leung, T.T Wong and Y-S Zhu ,
“An improved optimal bit allocation method for sub-band coding,” Pattern
Recognition Letters, vol. 24, December 2003, pp. 3007-3013. |
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48. |
John Sum+, Hong Shen,
Jie Wu, G.H. Young and C.S. Leung, “Analysis
on extended ant routing algorithm for network routing and management,” Journal of Supercomputing, vol. 24, 2003, pp. 327-340. |
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49. |
C.S. Leung, John Sum+, and Herbert Chan+, “Improved
transmission of vector quantized data over noisy channels,” Neural Computing and
Applications, (accepted). |
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50. |
C.S. Leung and A.C. Tsoi,
“Combine learning and pruning for recurrent radial basis
function networks based on recursive least Square algorithm,” Neural
Computing and Applications, vol. 15, 2006, pp. 62-79. |
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51. |
K.W. Wong and C.S. Leung, “Use of
periodic and monotonic activation functions in multi-layer feedforward neural networks trained by extended Kalman filtering algorithm,” IEE Proceedings - Vision,
Image and Signal Processing, vol.149, 2002,
pp. 217 -224. |
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52. |
Ze Wang+, C.S. Leung, T. T. Wong, P.M. Lam, and Y.S. Zhu, “Compressing an image-based relighting data set using eigen–analysis and wavelets,” IEE Proceedings - Vision,
Image and Signal Processing, vol. 151, Issue 5, OCT, 2004, pp. 378 – 388. |