Journal Papers

  1. L.M. Po, L. Feng, Y. Li, X. Xu, C.H. Cheung, K.W. Cheung, "Block-based adaptive ROI for remote photoplethysmography," Multimedia Tools and Applications, March 2017.

  2. L. Feng, L.M. Po, Y. Li, F. Yuan, "Face liveness detection using shearlet based feature descriptors," Journal of Electronic Imaging, 25(4), August 2016. (Youtube Demo)

  3. L. Feng, L.M. Po, Y. Li, X. Xu, F. Yuan, C.H. Cheung, K.W. Cheung, "Integration of Image Quality and Motion Cues for Face Anti-Spoofing: a Neural Network Approach," Journal of Visual Communication and Image Representation, Volume 38, pp. 451-460, July 2016. (Youtube Demo)

  4. M. Liu, H. Fu, L.M. Po, "Cuffless Blood Pressure Estimation Based on Photoplethysmography Signal and its Second Derivative," International Journal of Computer Theory and Engineering (IJCTE), August 2016.

  5. F. Yuan, L.M. Po, M. Liu, X. Xu, E. Jian, K.M. Wong , K.W. Chenug, "Shearlet Based Video Fingerprint for Content-based Copy Detection," Journal of Signal and Information Processing, Vol. 7, No.2, pp. 84-97, May 2016.

  6. Y. Li, L.M. Po, C.H. Cheung, X. Xu, L. Feng, F. Yuan, K.W. Cheung, "No-Reference Video Quality Assessment with 3D Shearlet Transform and Convolutional Neural Networks," IEEE Trans. on Circuits and Systems for Video Technology, Vol. 26, Issue 6, pp. 1044-1057, June 2015.

  7. Y. Li, L.M. Po, X. Xu, L. Feng, F. Yuan, C.H. Cheung, K.W. Cheung, "No-reference image quality assessment with shearlet transform and deep neural networks," Neurocomputing, Volume 154, Pages 94–109, April 2015.

  8. L. Feng, L.M. Po, X. Xu, Y. Li, R. Ma, "Motion Resistant Remote Imaging Photoplethysmography Based on Optical Properties of Skin," IEEE Trans. on Circuits and Systems for Video Technology, Vol. 25, Issue 5, pp. 879-891, October 2014.

  9. Y. Li, L.M. Po, X. Xu, L. Feng, "No-reference image quality assessment using statistical characterization in the shearlet domain," Signal Processing: Image Communication, Vol. 29, Issue 7, pp. 748-75, August 2014.

  10. X. Xu, L.M. Po, C. H. Cheung, K. W. Cheung, L. Feng, C. W. Ting, K. H. Ng, "Adaptive depth truncation filter for MVC based compressed depth image," Signal Processing: Image Communication, Vol. 29, Issue 3, pp. 316-331, March 2014.

  11. L.M. Po, C.K. Wong, C.W. Ting, H.C. Ma, K.H. Ng, "Radical-Stroke based Chinese Input Method using Dynamic Radical Keypad on Touchscreen Smartphones," The HKIE Transactions, Volume 20, Issue 3, pp. 188-193, Sept. 2013.

  12. X. Xu, L.M. Po, K. H. Ng, L. Feng, K. W. Cheung, C. H. Cheung, C. W. Ting, "Depth map misalignment correction and dilation for DIBR view synthesis," Signal Processing: Image Communication, Volume 28, Issue 9, pp. 1023-1045, October 2013.

  13. L.M. Po, K.H. Ng, X. Xu, K.W. Cheung, L.T. Feng, " An adaptive motion compensation method using superimposed inter-frame signals," Journal of Real-Time Image Processing, 5 April 2013.

  14. C. Chen, J. Chen, T. Xia, Z. Ju, L.M. Po, " An improved hybrid fast mode decision method for H.264/AVC intra coding with local information," Multimedia Tools Applications, Vol. 72, Issue 1, pp. 687-704, Feb. 2013.

  15. K. M. Wong, L. M. Po, K. W. Cheung, C. W. Ting, K. H. Ng, and X. Xu, "Horizontal Scaling and Shearing based Disparity Compensated Prediction," IEEE Trans. on Circuits and Systems for Video Technology, Vol. 22, No. 10, pp. 1457-1470, Oct. 2012.

  16. L. Zhang, Y. Zhu, L.M. Po, "A Fast Watermarking Algorithm with Low Complexity Error Compensation in H.264/AVC Bit-stream," Journal of Natural Science of Peking University, 2012.

  17. K. H. Ng, L. M. Po, K. W. Cheung and K. M. Wong, "Block-Matching Translational and Rotational Motion Compensated Prediction using Interpolated Reference Frame", EURASIP Journal on Advances in Signal Processing, Volume 2010, Article ID 385631, Dec. 2010.

  18. L. M. Po, K. M. Wong, K. W. Cheung, and K. H. Ng, "Subsampled Block-Matching for Zoom Motion Compensated Prediction," IEEE Trans. on Circuits and Systems for Video Technology, Vol. 20, No. 11, pp. 1625-1637, Nov. 2010.

  19. Y. Gao, S. Yu, L. M. Po, and J. Chen, "Collocated Macroblock based Motion Estimation for H.264/AVC on GPU," HKIE Transactions, Vol 17, No. 3, September 2010.

  20. L. M. Po, K. H. Ng, K. W. Cheung, K. M. Wong, Y. M. Salah Uddin and C. W. Ting, "Novel Directional Gradient Descent Searches for Fast Block Motion Estimation," IEEE Trans. on Circuits and Systems for Video Technology, Vol. 19, No. 8, August 2009.

  21. M. G. Sarwer, L. M. Po, and K. Guo and Q. M. Jonathan Wu, "Transform-Domain Rate-Distortion Optimization Accelerator for H.264/AVC Video Encoding," International Journal of Signal Processing, vol.5, No. 3, pp. 238-248, Summer 2009.

  22. K. H. Ng, L. M. Po, K. M. Wong, C. W. Ting, and K. W. Cheung, "A Search Patterns Switching Algorithm for Block Motion Estimation," IEEE Trans. on Circuits and Systems for Video Technology," Vol. 19, No. 5, May 2009.

  23. Y. Gao, J. Chen, S. Yu, J Zhou, and L. M. Po, "The Training of Karhunen-Loeve Transform Matrix and its Application for H.264 Intra Coding," Multimedia Tools Application, Springer Science, Vol. 41, pp.111-123, Sept. 2008.

  24. M. G. Sarwer, L. M. Po, and Q. M. Jonathan Wu, "Fast Sum of Absolute Transformed Difference based 4x4 intra-mode decision of H.264/AVC Video Coding Standard," Signal Processing: Image Communication, Vol. 23, pp. 571-580, 2008.

  25. K. Guo and L. M. Po, "A Partial Codevector Updating Scheme Based on Rate-distortion Optimisation for Adaptive Vector Quantization," The HKIE Transactions, Vol. 14, pp. 28-36, Dec 2007.

  26. M. G. Sarwer and L. M. Po, "Fast Bit Rate Estimation for Mode Decision of H.264/AVC," IEEE Trans. on Circuits and Systems for Video Technology, Vol. 17. No.10, pp. 1402-1407, Oct. 2007.

  27. L. M. Po and K. Guo, "Transform-Domain Fast Sum of the Squared Difference Computation for H.264 Rate-Distortion Optimization," IEEE Trans. on Circuits and Systems for Video Technology, vol. 17, No. 6, pp. 765-773, June 2007.

  28. L. M. Po, C. W. Ting, K. M. Wong and K. H. Ng, "Novel Point-Oriented Inner Searches For Fast Block Motion Estimation," IEEE Trans. on Multimedia, Vol. 9, No. 1, pp. 9- 15, Jan 2007.

  29. L. M. Po, C. W. Ting, and K. H. Ng, "New Enhanced Hexagon-Based Search Using Point-Oriented Inner Search for Fast Block Motion Estimation," International Journal on Signal Processing, 3(3), pp. 193-197, 2006.

  30. Z. Y. Mai, C. L. Yang, L. M. Po, and S. L. Xie, "A New Rate-Distortion Optimization Using Structural Information in H.264 I-Frame Encoder," Lecture Notes in Computer Science, Vol 3708/2005, Springer-Verlag GmbH, Oct. 2005, pp 435-441.

  31. C. H. Cheung and L. M. Po, "Novel Cross-diamond-hexagonal Search Algorithms for Fast Block Motion Estimation," IEEE Trans. on Multimedia, vol. 7, No. 1, pp. 16 - 22, Feb 2005.

  32. C. Zhu, X. Lin, L. P. Chau, and L. M. Po, "Enhanced Hexagonal Search for Fast Block Motion Estimation," IEEE Trans. on Circuits and Systems for Video Technology, vol. 14, Issue 10, pp. 1210 - 1214, Oct. 2004.

  33. C. H. Cheung and L. M. Po, "Adjustable Partial Distortion Search Algorithm for Fast Block Motion Estimation," IEEE Trans. on Circuits and Systems for Video Technology, Vol.13, No. 1, pp. 100-110, Jan. 2003.

  34. K. W. Cheung and L. M. Po, "Spatial Coefficient Partitioning for Lossless Wavelet Image Coding," IEE Proc.-Vis. Image Signal Process., Vol. 149, No. 6, pp. 365-369, Dec. 2002.

  35. C. H. Cheung and L. M. Po, "A Novel Cross-Diamond Search Algorithm for Fast Block Motion Estimation," IEEE Trans. on Circuits and Systems for Video Technology, Vol.12, No. 12, pp. 1168-1177, Dec. 2002.
    Fast Block Matching Motion Estimation Algorithms Source Code: 20040224_ME_Programs (15 Kbytes), ReadMe.

  36. S. Y. Wang and L. M. Po, "Embedded Lossless Wavelet-based Image Coder based on Successive Partition and Hybrid bit Scanning," IEICE Trans. on Fundamentals Special Section on DSP, Vol. E84-A, No. 8, pp. 1863-1868, Auguest 2001.

  37. C. Zhu, L. M. Po and Y. Hua, "Optimized feature map finite-state vector quantization for image coding," IEE Proceedings: Vision, Image and Signal Processing, Vol. 147, Issue 3, pp. 266-270, June 2000.

  38. C. K. Cheung and L. M. Po, "Normailized Partial Distortion Search Algorithm for Block Motion Estimation", IEEE Trans. on Circuits and Systems for Video Technology, Vol.10, Issue 3, pp. 417-422, April 2000.

  39. J. B. Xu, L. M. Po and C. K. Cheung, " Adaptive motion tracking block matching algorithms for video coding," IEEE Trans. on Circuits Syst. Video Technol. vol. 97, Oct.,1999, pp.1025-1029.

  40. Y. Zhang and L. M. Po, "Variable tree size fractal compression for wavelet pyramid image coding," Signal Processing: Image Communication, vol. 14, pp. 195-208, 1999.

  41. C. Zhu and L. M. Po, "Minimax partial distortion competitive learning algorithm for optimal codebook design ," IEEE Trans. on Image Processing, vol.7, No. 10, pp. 1400-1409, Oct. 1998.
    Source Code and Test Samples: mpdcla.tar.gz (492 Kbytes)

  42. K. W. Cheung and L. M. Po, "Low complexity 2-D preprocessing for discrete multiwavelet transform of image signals," IEE Electronics Letters, vol. 33, no.12, pp. 1037-1039, 5th June 1997.

  43. S. W. Chiang and L. M. Po, "Adaptive lossy LZW algorithm for palettised image compression," IEE Electronics Letters, vol. 33, no. 10, pp. 852-854, 8th May 1997.

  44. Y. Zhang and L. M. Po, "Speeding up fractal image encoding by wavelet-based block classification," IEE Electronics Letters, vol. 32, no. 23, pp. 2140-2141, Nov. 1996.

  45. C. Zhu and L. M. Po, " Partial distortion sensitive competitive learning algorithm for optimal codebook design," IEE Electronics Letters, vol. 32, no. 19, pp. 1757-1758, Sept. 1996.

  46. L. M. Po and W. C. Ma, "A novel four-step search algorithm for fast block motion estimation," IEEE Trans. Circuits Syst. Video Technol., vol. 6, No. 3, pp. 313-317, Jun. 1996.
    Fast Block Matching Motion Estimation Algorithms Source Code: 20040224_ME_Programs (15 Kbytes), ReadMe.

  47. L. M. Po, W. T. Tan and W. B. Wong, "Quadtree based colour quantization image compression," IEE Electronics Letters, vol. 31, no. 23, pp. 1988-1990, 9 Nov. 1995.

  48. L. M. Po and C. K. Chan, "Adaptive dimensionality reduction techniques for tree-structured vector quantization," IEEE Trans. on Communications, Vol. 42, No. 6, pp. 2246-2257, June 1994.

  49. L. M. Po and W. T. Tan, "Block address predictive colour quantisation image compression," IEE Electronics Letters, vol. 30, no. 2, pp. 120-121, Jan. 1994.

  50. C. K. Chan and L. M. Po, "A complexity reduction technique for image vector quantization," IEEE Trans. on Image Processing, vol. 1, no. 3, pp. 312-321, July 1992.

  51. L. M. Po and C. K. Chan, "Directionally classified image vector quantisation using Walsh Hadamard subspace distortion," IEE Electronics Letters, vol. 27, No. 21, pp. 1964-1967, 10th October 1991.

  52. L. M. Po and C. K. Chan, "Hierarchical mean-residual image vector quantiser using Gradient-Laplacian subspace distortion," IEE Electronics Letters, vol. 26, No. 17, pp. 1362-1364, 16th Aug 1990.

  53. L. M. Po and C. K. Chan "Novel subspace distortion measurement for efficient implementation of image vector quantiser," IEE Electronics Letters, vol. 26, no. 7, pp. 480 482, 29th March 1990.

  54. C. K. Chan and L. M. Po, "Multiprocessor multipath recursive filter structure with no increase in computation complexity," IEE Electronics Letters, vol. 24, no. 20, pp. 1279-1280, 29th Sept 1988.



Conference Papers

  1. Y. Li, L. M. Po, L. Feng, F. Yuan, " No-reference Image Quality Assessment with Deep Convolutional Neural Networks," Proceeding of 2016 IEEE International Conference on Digital Signal Processing (DSP), Beijing, China, 16-18 October, 2016.

  2. Y. Li, L. M. Po, X. Xu, L. Feng, F. Yuan, " Face Liveness Detection and Recognition using Shearlet based Feature Descriptiors," Proceeding of 2016 International Conference on Acoustics, Speech, and Signal Processing, ICASSP2016, Shanghai, China, pp. 874 - 877, March 2016.

  3. F. Yuan, L. M. Po, L. Feng, Y. Li, X. Xu, "A Robust MEL-Bands Audio Fingerprint based on Spectral Local Maximum Energy for Content based Copy Detection," International Congress on Engineering and Information (ICEAI 2016), Osaka, Japan, May 2016.

  4. Y. Li, L. M. Po, X. Xu, L. Feng, F. Yuan, C. H. Cheung, K. W. Cheung, " No-Reference Image Quality Assessment Using Shearlet Transform and Stacked Autoencoders," Proceeding of 2015 IEEE International Symposium on Circuits and Systems, ISCAS2015, Lisbon, Portugal, May 2015.

  5. L. M. Po, X. Xu, L. Feng, Y. Li, K. W. Cheung, C. H. Cheung, "Frame Adaptive ROI for Photoplethysmography Signal Extraction from Fingertip Video Captured by Smartphone," Proceeding of 2015 IEEE International Symposium on Circuits and Systems, ISCAS2015, Lisbon, Portugal, May 2015.

  6. L. Feng, L. M. Po, X. Xu, Y. Li, C. H. Cheung, K. W. Cheung, Y. Fang, "Dynamic ROI Based on K-Means for Remote Photoplethysmography," Proceeding of 2015 International Conference on Acoustics, Speech, and Signal Processing, ICASSP2015, April 2015.

  7. L. Feng, L. M. Po, X. Xu, Y. Li, " Motion artifacts suppression for remote imaging photoplethysmography ," 9th International Conference on Digital Signal Processing 2014, August 2014.

  8. X. Xu, L. M. Po, K. W. Cheung, K. H. Ng, K. M. Wong, C. W. Ting, " Adaptive block truncation filter for MVC depth image enhancement," Proceeding of 2014 International Conference on Acoustics, Speech, and Signal Processing, ICASSP2014, pp. 544-548, May 4-9, 2014, Florence, Italy.

  9. X. Xu, L. M. Po, K. W. Cheung, L. Feng, C. H. Cheung," WATERSHED BASED DEPTH MAP MISALIGNMENT CORRECTION AND FOREGROUND BIASED DILATION FOR DIBR VIEW SYNTHESIS," Proceeding of 2013 IEEE International Conference on Image Processing ICIP 2013, September 15 - September 18, 2013, Melbourne, Australia.

  10. L. Feng, L. M. Po, X. Xu, K. H. Ng, K. W. Cheung, " An adaptive background biased depth map hole-filling method for Kinect," The 39th Annual Conference of the IEEE Industrial Electronics Society (IECON 2013), November 11-13, 2013, Vienna, Austria.

  11. X. Xu, L. M. Po, C. H. Cheung, L. Feng, K. H. Ng, K. W. Cheung, " Depth-aided Exemplar-based Hole Filling for DIBR View Synthesis," Proceeding of 2013 IEEE International Symposium on Circuits and Systems, May 2013, Beijing.

  12. L. M. Po, L. Wang, L. Feng, K. H. Ng, K. W. Cheung, "Enhanced Adaptive Intra Mode Bit Skip For H.264/AVC," Proceeding of 2012 International Conference on Signal Processing, Communications and Computing, ICSPCC2012, Hong Kong, August 2012.

  13. X. Xu, L. M. Po, K. H. Ng, K. W. Cheung, K. M. Wong, C. W. Ting, "Watershed and Random Walks based Depth Estimation for Semi-Automatic 2D to 3D Image Conversion," Proceeding of 2012 International Conference on Signal Processing, Communications and Computing, ICSPCC2012, Hong Kong, August 2012.

  14. X. Xu, L. M. Po, K. W. Cheung, K. H. Ng, K. M. Wong, C. W. Ting, "A Foreground Biased Depth Map Refinement Method For DIBR View Synthesis," Proceeding of 2012 International Conference on Acoustics, Speech, and Signal Processing, ICASSP2012, pp. 805-808, Kyoto, Japan, March 24-30, 2012.

  15. K. H Ng, L. M. Po, K. W. Cheung, X. Xu, K. M. Wong, "A New Motion Compensation Method using Superimposed Inter-Frame Signals," Proceeding of 2012 International Conference on Acoustics, Speech, and Signal Processing, ICASSP2012, pp. 1213-1216, Kyoto, Japan, March 24-30, 2012.

  16. L. M. Po, S. Zhang, X. Xu, Y. Zhu, "A New Multidirectional Extrapolation Hole-Filling Method for Depth-Image-Based Rendering," Proceeding of 2011 IEEE International Conference on Image Processing (ICIP2011), pp. 2637-2640, Brussels, Belgium, September 11-14, 2011.

  17. C. L. Yang, D. Q. Xiao, L. M. Po, W. H. Mo, "Adaptive quantization in DCT domain for distributed video coding," 2011 Data Compression Conference, DCC 2011, p 484, 29-31 March 2011

  18. K. M. Wong, L. M. Po, K. W. Cheung, K. H. Ng, X. Xu, "Streching, Compression and Shearing Dispartity Compensated Prediction Techniques for Stereo and Multiview Video Coding," Proceeding of 2011 International conference on Acoustics, Speech, and Signal Processing, ICASSP2011, pp. 841-844, Prague, Czech Republic, May 22-27, 2011.

  19. L.M. Po, C.K. Wong, C.W. Ting, K.H. Ng, K.M. Wong, C.H. Cheung, K.W. Cheung, "Dynamic Candidate Keypad for Stroke-based Chinese Input Method on Touchscreen Devices," 2011 IEEE Symposium on Computers & Informatics, Kuala Lumpur, Malaysia, March 20-22, 2011.

  20. L. M. Po, X. Xu, Y. Zhu, S. Zhang, K. W. Cheung, and C. W. Ting, "Automatic 2D-to-3D Video Conversion Technique based on Depth-from-Motion and Color Segmentation," Proceeding of 2010 IEEE 10th International Conference on Signal Processing, Vol. II, pp. 1000-1003, Beijing, China, 24-28 October 2010.

  21. L. M. Po, L. Wang, K. W. Cheung, K. M. Wong, K. H. Ng, S. Li and C. W. Ting, "Distance-based Weighted Prediction for Adaptive Intra Mode Bit Skip in H.264/AVC," Proceeding of 2010 IEEE International Conference on Image Processing, pp. 2869-2872, Hong Kong, 26-29 September 2010.

  22. L. Wang, L. M. Po and S. Li, "Enhanced SAITD Cost Function for H.264/AVC Intra 4x4 Mode Decision," The 4th International Conference of Multimedia and Ubiquitous Engineering (MUE 2010), Cebu , Philippines, Aug 2010.

  23. K. H. Ng, L. M. Po, S. Li, K. M. Wong, and L. Wang"A Linear Prediction Based Fractional-Pixel Motion Estimation Algorithm," The 4th International Conference of Multimedia and Ubiquitous Engineering (MUE 2010), Cebu, Philippines, Aug 2010.

  24. L. Zhang, Y. Zhu and L. M. Po, "A Novel Watermarking Scheme with Compensation in Bit-Stream Domain for H.264/AVC," Proceeding of IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP2010), Dallas, Texas, USA, March 2010.

  25. K. M. Wong, L. M. Po, K. W. Cheung and K. H. Ng, "Block-Matching Translation and Zoom Motion-Compensated Prediction by Sub-Sampling," Proceeding of IEEE International Conference on Image Processing (ICIP2009), pp. 1597-1600, Cairo, Egypt, November 7-10, 2009.

  26. K. H. Ng, L. M. Po, K. M. Wong, C. W. Ting, K. W. Cheung, "Multiple Block-Size Search Algorithm for Fast Block Motion Estimation," International Conference on Information, Communications and Signal Processing, Macao, China, 8-10 Dec 2009.

  27. C. L. Yang, R. K. Leung, L. M. Po and Z. Y. Mai, "An SSIM-Optimal H.264/AVC Inter Frame Encoder," Proceeding of 8th IEEE/ACIS International Conference on Computer and Information Science (ICIS 2009), pp. 291-295, Shanghai, China, June 2009.

  28. L. M. Po, C. K. Wong, Y. K. Au, K. H. Ng and K. M. Wong, "Six-digit Stroke-based Chinese Input Method," 2009 International Conference on Systems, Man, and Cybernetics, San Antonio, Texas, USA, October 2009.

  29. K. M. Wong, L. M. Po and K. W. Cheung, "Block-Matching Translation and Zoom Motion-Compensated Prediction," Proceeding of 2009 International conference on Multimedia and expo, ICME 2009, pp. 33-36, New York, USA, June 2009.

  30. L. Wang, L. M. Po, Salah Uddin, K. M. Wong and S. Li, "A Novel Weighted Cross Prediction for H.264 Intra Coding," Proceeding of 2009 International conference on Multimedia and expo, ICME 2009, pp. 165-168, New York, USA, June 2009.

  31. L. M. Po, K. H. Ng, K. M. Wong, K. W. Cheung, "Multi-Direction Search Algorithm for Block-based Motion Estimation," Proceeding of 2008 IEEE Asia Pacific Conference on Circuits and Systems (APCCAS), pp. 1466-1469, Macao, China, Nov 2008.

  32. M. G. Sarwer, and L. M. Po, "Complexity Reduction Mode Selection of H.264/AVC Intra Coding," Proceeding of 2008 International Conference on Audio Language and Image Processing (ICALIP), pp. 1486-1491, Shanghai, China, July 2008.

  33. L. M. Po, Y. M. Salah Uddin, K. Guo, L. Wang, "Compensated Sum of Absolute Difference for Fast H.264 Inter Mode Selection," Proceeding of 2008 International Conference on Audio Language and Image Processing (ICALIP), pp. 1486-1491, Shanghai, China, July 2008.

  34. K. M. Wong, L. M. Po and K. W. Cheung, "Dominant color structure descriptor for image retrieval," Proceeding of 2007 International Conference on Image Processing, pp. VI-365 � VI-368, San Antonio, Texas, USA, Sep. 2007.

  35. C. L. Yang, H. X. Wang and L. M. Po, "Improved Inter Prediction based on Structural Similarity in H.264," 2007 International Conference on Signal Processing and Communications (ICSPC 2007), pp. 340-343, Nov. 2007.

  36. K. Guo, and L. M. Po, "A new partial codeword updating scheme based on rate-distortion optimization for adaptive vector quantization," Proceeding of 2007 International Conference on Multimedia and Expo ICME 2007, pp. 751-754, Beijing, China, July 2007.

  37. K. W. Wong, L. M. Po and K. W. Cheung, "A compact and efficient color descriptor for image retrieval," Proceeding of 2007 International Conference on Multimedia and Expo ICME 2007, pp. 611-614, Beijing, China, July 2007.

  38. M. G. Sarwer, and L. M. Po, "Bit rate estimation for cost function of 4x4 intra mode decision of H.264/AVC," Proceeding of 2007 International Conference on Multimedia and Expo ICME 2007, pp. 1579-1582, Beijing, China, July 2007.

  39. K. H. Ng, L. M. Po and K. M. Wong, "Search pattern switching form motion estimation using rate of error descent," Proceeding of 2007 International Conference on Multimedia and Expo ICME 2007, pp. 1583-1586, Beijing, China, July 2007.

  40. L. M. Po, C. W. Ting, K. M. Wong and K. H. Ng, "Point Oriented Hexagonal Inner Search For Fast Block Motion Estimation," Proceeding of 2006 International Conference on Image Processing, pp. 2349 - 2352, Atlanta, GA, USA, October 2006.

  41. L. M. Po, C. W. Ting, and K. H. Ng, "Enhanced Diamond Search Using Four-Corner-Based Inner Search for Fast Block Motion Estimation," Proceeding of IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol. 2, pp. 901-904, May 2006, Toulouse, France.

  42. Z. Y. Mai, C. L. Yang, K. Z. Kuang and L. M. Po, "A Novel Motion Estimation Method based on Structural Similarity for H.264 Inter Prediction," Proceeding of IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol. 2, pp. 913-916, Toulouse, France, May 2006.

  43. G. H. Chen, C. L. Yang, L. M. Po and S. L. Xie, "Edge-based Structural Similarity for Image Quality Assessment," Proceeding of IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol. 2, pp. 933-936, Toulouse, France, May 2006.

  44. K. W. Wong, K. W. Cheung, L. M. Po, "MIRROR: An interactive content based image retrieval system," Proceeding of IEEE International Symposium onCircuits and Systems, pp. 1541-1544, 2005.

  45. C. W. Ting, W. H. Lam, and L. M. Po, "Fast block-Matching Motion Estimation by Recent-Biased Search for Multiple Reference Frames," Proceeding, of IEEE International Conference on Image Processing, pp. 1445-1448, Oct. 2004, Singapore.

  46. C. W. Ting, C. W. Lam, and L. M. Po,"A novel early-accepted partial distortion algorithm for fast block motion estimation," Proceedings of 2004 International Symposium on Intelligent Multimedia, Video and Speech Processing, pp. 444-447, Oct. 2004, Hong Kong.

  47. C. W. Lam, L. M. Po and C. H. Cheung, "A Novel Kite-Cross-Diamond Search Algorithm For Fast Block Matching Motion Estimation", Proceeding of IEEE International Symposium on Circuits and Systems, Vancouver, Canada, May 2004.

  48. C. W. Lam, L. M. Po and C. H. Cheung, "A Novel Kite-Cross-Diamond Search Algorithm For Fast Video Coding and Videoconferencing Applications", Proceeding ofEE International Conference on Acoustics, Speech, and Signal Processing, Montreal, Quebec, Canada, May 2004.

  49. K. M. Wong and L. M. Po, "MPEG-7 Dominant Color Descriptor Based Relevance Feedback Using Merged Palette Histogram", Proceeding IEEE International Conference on Acoustics, Speech, and Signal Processing, Montreal, Quebec, Canada, May 2004.

  50. C. W. Lam, L. M. Po and C. H. Cheung, "A New Cross-Diamond Search Algorithm for Fast Block Matching Motion Estimation", Proceeding of 2003 IEEE International Conference on Neural Networks and Signal Processing, pp. 1262-1265, Nanjing, China, Dec. 2003.

  51. C. W. Ting, L. M. Po and C. H. Cheung, "Center-Biased Frame Selection Algorithms For Fast Multi-Frame Motion Estimation in H.264", Proceeding of 2003 IEEE International Conference on Neural Networks and Signal Processing, pp. 1258-1261, Nanjing, China, Dec. 2003.

  52. C. L. Yang, L. M. Po, C. H. Cheung and K. W. Cheung, "A Novel Ordered-SPIHT For Embedded Color Image Coding", Proceeding of 2003 IEEE International Conference on Neural Networks and Signal Processing, pp. 1087-1090, Nanjing, China, Dec. 2003.

  53. K. M. Wong, C. H. Cheung, T. S. Liu and L. M. Po, "Dominant Color Image Retrieval using Merged Histogram", Proceeding of 2003 IEEE International Symposium on Circuits and Systems, Vol. 2, pp. 908-911, Bangkok, Thailand, May 2003.

  54. C. H. Cheung and L. M. Po, "A Novel Histogram-biasing Factor for Fast Sorted Histogram-based Measurement in Large Image Database Retrieval System," Proceeding of 2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol.-III, pp. 601-604, April 2003, Hong Kong, China.

  55. K. M. Wong, C. H. Cheung and L. M. Po, "Merged-Color Histogram for Color Image Retrieval," Proceeding of 2002 IEEE International Conference on Image Processing, Vol. 3, pp. 949-952, New York, USA, Sept. 2002.

  56. C. H. Cheung and L. M. Po, "A Novel Block Motion Estimation Algorithm with Controllable Quality and Searching Speed", 2002 IEEE International Symposium on Circuits and Systems, vol. 2, pp. 496-499, Scottsdale, Arizona, May 2002.

  57. K. W. Cheung and L. M. Po, "Lossless Wavelet Image Coding using Layered coefficient Partitioning,", 2002 IEEE International Symposium on Circuits and Systems, vol. 1, pp. 789-792, May 2002, Scottsdale, Arizona.

  58. K. W. Cheung and L. M. Po, "Spatial Coefficient Partitioning for Lossless Wavelet Image Coding," 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing, Vol. 4, pp. 3509-3512, May 2002, Orlando, Florida, USA.

  59. C. H. Cheung and L. M. Po, "Generalized Partial Distortion Search Algorithm For Block-Matching Motion Estimation," 2001 IEEE International Conference on Image Processing, vol. 3, pp. 510-513, Oct 2001, Greece.

  60. C. H. Cheung and L. M. Po, "A Fast Block Motion Estimation Using Progressive Partial Distortion Search", 2001 International Symposium on Intelligent Multimedia, Video and Speech Processing, pp. 506-509, May 2001, Hong Kong.

  61. K. W. Cheung and L. M. Po, "Integer Multiwavelet Transform for Lossless Image Coding", 2001 International Symposium on Intelligent Multimedia, Video and Speech Processing, pp. 117-120, May 2001, Hong Kong.

  62. C. H. Cheung, L. M. Po and K. M. Wong, "Web-based Beowulf-Class Parallel Computing on Image Database Indexing and Retrieval System", 2001 International Symposium on Intelligent Multimedia, Video and Speech Processing, pp. 457-460, May 2001, Hong Kong.

  63. C. H. Cheung and L. M. Po, "Generalized Partial Distortion Search Algorithm For Fast Block Motion Estimation," 2001 IEEE International conference on Acoustics, Speech, and Signal Processing, vol. 3, pp. 1601-1604, May 2001, Salt Lake City, USA.

  64. C. H. Cheung, S. W. Chiang and L. M. Po, "Lossy Lempel-Ziv Compression for Speech Coding", The First IEEE Pacific Rim Conference on Multimedia, University of Sydney, Australia, Dec. 2000.,

  65. C. H. Cheung, S. W. Chiang and L. M. Po, "Predictive Lossy LZSS Algorithm for Fidelity-Constrained Image Coding", International Forum cum Conference on Information Technology, Bangkok, Thailand, Aug. 2000.,

  66. J. H. Fan, S. T. Yiu, and L. M. Po, "Image Retrieval Using Parallel Algorithm on the Beowulf Class Supercomputer", International Workshop on Multimedia Data Storage, Retrieval, Integration and Applications, Hong Kong, Jan. 2000, pp.188-191,

  67. L. M. Po and C. K. Cheung "A New Fast Block Motion Estimation Algorithm Using Normalized Partial Distortion Measure", International Workshop on Multimedia Data Storage, Retrieval, Integration and Applications, Jan. 13-15, 2000 pp.34-39,

  68. C. H. Cheung, S. Y. Wang, K. W. Cheung and L. M. Po, "Embedded Lossless Wavelet Coder using Multi-Partitioning Algorithm with Bit-Truncking", 1999 IEEE International Conference on Image Processing, vol. 4, pp. 44-47, Oct 1999.

  69. K. W. Cheung, C. H. Cheung and L. M. Po, "A Novel Multiwavelet-based Integer Transform for Lossless Image Coding", 1999 IEEE International Conference on Image Processing, vol. 1, pp. 444-447, Oct 1999.

  70. S. Y. Wang, C. H. Cheung, K. W. Cheung and L. M. Po, "Successive Partition Zero Coder for Embedded Lossless Wavelet-Based Image Coding", 1999 IEEE International Conference on Image Processing, vol. 4, pp. 40-43, Oct 1999.

  71. S. Y. Wang, C. H. Cheung, K. W. Cheung and L. M. Po, "Adaptive Oriental Lossless Wavelet Coder", TENCON'99, 15-18 Sept. 1999.

  72. S. Y. Wang, C. H. Cheung, K. W. Cheung and L. M. Po, "Embedded Lossless Wavelet-Based Image Coding Algorithm With Successive Partition and Hybrid Bit Scanning", IEEE 1999 International Workshop on Multimedia Signal Processing, 13-15 Sept 1999 pp.383-388.

  73. C. H. Cheung, S. Y. Wang, K. W. Cheung and L. M. Po, "Embedded Lossless Wavelet Coder Using Multi-Partitioning Algorithm", ISCA CATA'99, Proceedings of the ISCA 14th International Conference, ISBM:1-880843-27-7, pp.99-102, Apr. 7-9, 99.

  74. C. H. Cheung, S. Y. Wang, K. W. Cheung and L. M. Po, " A Lossless Multi-Partitioning Successive Zero Coder for Wavelet-based Progressive Image Transmission", 1999 IEEE International Conference on Acoustics, Speech, and Signal Processing (IEEE ICASSP'99) vol.6 1999 pp.3209-3212.

  75. K. W. Cheung, C. H. Cheung and L. M. Po, "Embedded zerotree image coding based on integer cosine transform", Proceeding of the 1998 International Symposium on Image, Speech, Signal Processing and Robotics, vol. II, pp. 157-161, The Chinese University of Hong Kong, Hong Kong, Sep. 1998.

  76. C. K. Cheung and L. M. Po, "A novel distortion comparison method using normalized partial distortion measure for block motion estimation", Proceeding of the 1998 International Symposium on Image, Speech, Signal Processing and Robotics, vol. II, pp. 163-167, The Chinese University of Hong Kong, Hong Kong, Sep. 1998.

  77. L. M. Po, Y. Zhang, K. W. Cheung and C. H. Cheung, "A novel subtree partitioning algorithm for wavelet-based fractal image coding", Proceeding of IEEE International Conference on Acoustics, Speech and Signal Processing, vol. V, pp. 2677-2680, Seattle, Washington, USA, May. 1998.

  78. L. M. Po, Y. Zhang, K. W. Cheung and C. H. Cheung, "Efficient subtree splitting algorithm for wavelet-based fractal image coding," Proceeding of IEEE International Symposium on Circuits and Systems, vol. IV, pp. 106-109, Monterey, CA, USA, May. 1998.

  79. C. K. Cheung and L. M. Po, "Hybrid search algorithm for block motion estimation," Proceeding of IEEE International Symposium on Circuits and Systems, vol. IV, pp. 297-300, Monterey, CA, USA, May. 1998.

  80. Y. Zhang, L. M. Po, and Y. L. Yu, "Wavelet Transform Based Variable Tree Fractal Video Coding," Proceeding of IEEE International Conference on Image Processing, vol. II, pp. 294-297, Santa Barbara, CA, USA, Oct. 1997.

  81. J. B. Xu and L. M. Po, "A New Prediction Model Search Algorithm for Fast Block Motion," Proceeding of IEEE International Conference on Image Processing, vol. III, pp. 610-613, Santa Barbara, CA, USA, Oct. 1997.

  82. C. K. Cheung and L. M. Po, "A hierarchical block motion estimation algorithm using partial distortion measure," Proceeding of IEEE International Conference on Image Processing, vol. III, pp. 606-609, Santa Barbara, CA, USA, Oct. 1997.

  83. K. W. Cheung and L. M. Po, "Preprocessing for Discrete Multiwavelet Transform of Two-dimensional Signals," Proceeding of IEEE International Conference on Image Processing, vol. II, pp. 350-353, Santa Barbara, CA, USA, Oct. 1997.

  84. C. H. Cheung, and L. M. Po, "Text-Driven Automatic Frame Generation Using MPEG-4 Synthetic/Natural Hybrid Coding for 2-D Head-and-Shoulder Scene," Proceeding of IEEE International Conference on Image Processing, vol. II, pp. 69-72, Santa Barbara, CA, USA, Oct. 1997.

  85. L. T. Leung and L. M. Po, "Low bit-rate video coding using 2-D adaptive sampling motion compensation," Proceeding of IEEE International Symposium on Circuits and Systems, vol. 2, pp. 1169-1172, Hong Kong, June 1997.

  86. C. H. Cheung, H. W. Wong and L. M. Po, "Text-driven automatic image sequence generation using facial modeling for digital TV news production system," Proceeding of IEEE International Symposium on Circuits and Systems, vol. 2, pp. 1409-1412, Hong Kong, June 1997.

  87. K. W. Cheung and L. M. Po, "Low complexity preprocessing for 2D discrete multiwavelet transform," Proceeding of 1997 International Symposium on Circuits and Systems, vol. 1, pp. 373-380, Hong Kong, June 1997.

  88. C. K. Cheung and L. M. Po, " A hierarchical block matching algorithm using partial distortion measure," Proceeding of IEEE International Symposium on circuits and systems, vol. II, pp. 1237-1240, Jun. 1997.

  89. L. M. Po and C. K. Cheung, " A new center-biased orthogonal search algorithm for fast block motion estimation," Proceeding of IEEE TENCON' 96, vol. 2, pp. 874-877, Nov. 1996.

  90. C. K. Cheung and L. M. Po, " A hybrid adaptive search algorithm for fast block motion estimation," Proceeding of the Fourth IEEE International Symposium on Signal Processing and its Applications, vol. 1, pp. 365-368, Aug. 1996.

  91. S. W. Chiang and L. M. Po, " Lossy LZW algorithm with adaptive threshold for palettized image compression," Proceeding of the Fourth IEEE International Symposium on Signal Processing and its Applications, vol. 1, pp. 144-147, Aug. 1996.

  92. L. T. Leung and L. M. Po, "Hierarchical predictive VQ for color image compression," Proceeding of Fourth IEEE International Symposium on Signal Processing and its Applications, vol. 1, pp. 148-151, Gold Coast Australia, Aug. 1996.

  93. L. M. Po, C. K. Cheung and W. C. Ma, " A novel fast block motion estimation algorithm using center-biased search pattern" Proceeding of IEEE International Conference on Neural Networks and Signal Processing, pp. II-1616 to II-1619, Nanjing, China, Dec. 1995.

  94. Y. Zhang and L. M. Po, " Fast fractal image coding using quadrant sub-block variances classification" Proceeding of IEEE International Conference on Neural Networks and Signal Processing, II-1540 to II-1543, Nanjing, China, December 1995.

  95. L. T. Leung and L. M. Po, "Variable block size predictive vector quantization for image coding," Proceeding of Second Asian Conference on Computer Vision ACCV'95, pp. III-218 to III-222, Singapore, December 1995.

  96. Y. Zhang and L. M. Po, " Fractal image coding in multi-dimensional color space using weighted vector distortion measure" Proceeding of Second Asian Conference on Computer Vision ACCV'95, pp. I-450 to I-453, Singapore, December 1995.

  97. L. M. Po and W. C. Ma, "A new center-biased search algorithm for block motion estimation," Proceeding of IEEE International Conference on Image Processing, Washington, D.C., U.S.A., October 1995.

  98. Y. Zhang and L. M. Po, " Fractal color image compression using vector distortion measure," Proceeding of IEEE International Conference on Image Processing, Washington, III-276 to III-279, D.C., U.S.A., October 1995.

  99. L. M. Po, W. T. Tan, and C. H. Chan, "Address predictive color quantization image compression for multimedia applications," Proceeding of IEEE International Conference on Acoustics, Speech and Signal Processing, Adelaide, South Australia, April 1994.

  100. L. M. Po, C. K. Chan and W. H. Lau, "A low complexity dimensionality selection method for subspace image vector quantization," Proceeding of Asian Conference on Computer Vision, pp. 117-120, Osaka, Japan, November ,1993

  101. L. M. Po, C. K. Chan and W. H. Lau, "Dimensionality selection of subspace vector quantization based on intraset distortions error," Proceeding IEEE Workshop on Visual Signal Processing and Communication, Melbourne, Australia, Sept. 1993

  102. L. M. Po, "Multi-subspace tree-structured vector quantizer design algorithms," Proceeding of International Conference on Acoustics, Speech and Signal Processing, vol. 5, pp. V-257 to V260, Minneapolis, U.S.A., April 1993.



Book Chapters

  1. L. M. Po and C.K. Chan, "Data compression techniques in image processing systems," Medical Imaging Techniques and Applications, Leondes C.T. (Ed), Chapter 4, pp. 169-213, Vol. 6 Gordon and Breach International Series in Engineering, Technology and Applied Science, Gordon and Breach Science Publishers, 1998.

  2. M. G. Sarwer, L. M. Po and Q. M. J. Wu, "Bit Rate Estimation for Cost Function of H.264/AVC," Multimedia, pp. 257-280, Book edited by: Kazuki Nishi, ISBN: 978-953-7619-87-9, INTECH, February 2010.


Patents

  1. L.M. Po and M.G. Sarwer, "Bit Rate Estimation in Data or Video Compression", United State Patent, US 8,798,137 B2, Aug. 2014.
  2. L.M. Po, K M Wong, K W Cheung, K H Ng, Y Liu, "Method and Apparatus for Zoom Motion Estimation", United State Patent, US8,170,110 B2, May 2012.
  3. L.M. Po, K M Wong, K W Cheung, K H Ng, Y Liu, "Method and Apparatus for Multiview Video Coding", United State Patent, US 2012/0114036 A1, May 2012.
  4. L.M. Po and K. Guo, "Method and apparatus for calculating an ssd and encoding a video signal ", United State Patent, US US 20080243971 A1, Aug. 2008.
  5. L.M. Po and K.H. Ng, "Motion estimation method", United State Patent, US 8055025 B2, June 2008.


Others

  1. L. M. Po, "Semi-Automatic 2D-to-3D Image Conversion Techniques for Touchscreen Device," Invited Seminar on "Latest Market Development on Display Technologies for Smart TV", at Hong Kong Convention and Exhibition Centre on 15 October 2012 which is jointly organized by Hong Kong Electronics Industry Council and Hong Kong Trade Development Council.

  2. L. M. Po, "Automatic 2D to 3D Conversion Techniques for 3D TV," Invited Seminar on "Latest Technological Developments and Applications of 3D Display", at Hong Kong Convention and Exhibition Centre on 14 Aril 2010 which is jointly organized by Hong Kong Electronics Industry Council.

  3. L. M. Po, "Lenna 97: A Complete Story of Lenna", CityU Image Processing Lab, Department of Electronic Engineering, City University of Hong Kong, July, 1998.

  4. Motion Estimation Research Development Package (Include source codes of 4SS, CDS, KCDS): 20051105_ME_Programs (60 Kbytes), ReadMe.

  5. Vector Quantization Design Algorithms Source Code (MPDCLA): mpdcla.tar.gz (492 Kbytes)